007 James Bond 007 1TR6 (Ger) FTZ regulation (close to CCITT Q.930/931) 2044 Superhero 2044 2B1Q 2 binary data, 1 quarternary redundance 2D 2-Dimensional 3ACC 3A Central Control 3D 3-Dimensional 3M Minnesota Mining and Manufacturing Company Ltd 3PTY Three Party Service (I.254 B) 4B3T 4 binary data, 3 ternary redundance (MMS43) 4GL Fourth Generation Language 4H Head, Heart, Hands, Health 5B6B 5 binary data, 6 binary redundance (code for OFT lines) 5XB COER 5 X-Bar Central Office Equipment Reports system A Aftermath AA Affirmative Action committee AA Alcoholics Anonymous AA Antiaircraft Artillery AA Associate in Accounting AA Auto Answer AA Automobile Association [England] AAA American Automobile Association AAAAAA Association for the Abolition of Abused Abbreviations and Assinine Acronyms AAAL American Academy of Arts and Letters AAAS American Association for the Advancement of Science AAII American Association of Individual Investors AAMSI American Association for Medical Systems Informatics AAP Affirmative Action Program AAP Applications Access Point [DEC] AARC Anglo-American Cataloguing Rules AARP American Association of Retired Persons AASP ASCII Asynchronous Support Package AAT Average Access Time AAX Automated Attendant eXchange AB ABle seaman a/b two wire phone connection (T&R) ABA American Bar Association ABA American Basketball Association ABA American Booksellers Association ABATS Automatic Bit Access Test System ABBR ABBReviation ABC American Broadcasting Company ABEND Abnormal End ABEND ABnormal END (of program execution) ABHC Average Busy Hour Calls ABI Application Binary Interface ABIOS Advanced BIOS ABM Asynchronous Balanced Mode ( -> SABME) ABME ABM extended ABRC Advisory Board for the Research Councils ABS Absolute ABS Acrylonitrile Butadiene Styrene (the plastic that computer cases, etc, are made of) ABS Alternative Billing Service ABSBH Average Busy Season Busy Hour ABT Abort AC Alternating Current AC Alternating Current (ac, see also DC) AC Ante Christum (before Christ) AC Ante Cibum (before meals) AC Automatic Computer ACA Asynchronous Communication Adapter ACAA Agricultural Conservation and Adjustment Administration ACAL Association of Computer Assisted Learning ACARD Advisory Council for Applied Research & Development ACAWS Advisory, Caution, And Warning System ACB Annoyance Call Bureau ACBL American Contract Bridge League ACC Accumulator ACC Argonne Code Center ACC Audio Communications Controller ACCO ACCOunting module [GEC] ACCS Army Command and Control System ACCS Automated Calling Card Service ACD Atlas Computing Division [RAL] ACD Automated Call Distribution ACD Automatic Call Distributing system ACD Automatic Call Distribution ACD Automatic Call Distributor [telephony] ACDA Automatic Call Disposition Analyzer ACE Advanced Computing Environment [SCO] ACE Advanced Computing Environments [Corporate name] ACE Adverse Channel Enhancements [Microcom] ACE Automatic Calibration and Equalization ACE Automatic Calling Equipment ACF Access Control Field ACF Advanced Communications Function ACF Advanced Communications Functions ACF2 Access Control Facility - 2 ACF-2 Access Control Facility - 2 ACFA Advanced CMOS Frame Aligner PEB2030 ACH Attempt per Circuit per Hour ACHEFT Automated ClearingHouse Electronic Funds Transfer ACI Answer Controller Interface (IOM2 Monitor Command) ACIA Asynchronous Communications Interface Adapter ACIAS Automated Calibration Internal Analysis System ACIS American Committee for Interoperable Systems ACK Acknowledge ACK Acknowledgment ACL Advanced Cmos Logic ACM Address Complete Message (SS7: in ISUP) ACM Association for Computing Machinery ACM Association for Computing Machinery [USA] ACMS Application Control Management System ACO Acronym Control Officer ACOF Attendant Control Of Facilities ACP ACtion Point ACP Ancillary Control Program ACP Auxillary Control Process ACROSS Automated Cargo Release and Operations Service System ACS Access ACS Access Control Set ACS Access Control System ACS Advanced Communications System ACS Asynchronous Communication Server ACSE Association Control Service Element ACSE Association Control Service Entity (ISO/CCITT layer 7) ACSL Advanced Control & Simulation Language [ICL] ACSNET Acedemic Computing Services NETwork ACSU Advanced t-1 Channel Service Unit ACTS Advanced Communications Technology Satellite ACTS Automated Coin Toll Service ACTS Automatic Coin Telephone Service [telephony] ACU Alarm Control Unit ACU Automatic Call Unit [telephony] ACU Automatic Calling Unit ACU Automatic Calling Unit ACW Alternating Continuous Waves AD After Date AD Anno Domini (in the year of our Lord) AD Application Development A/D Analog to Digital A/D Analog to Digital converter (see ADC) Ad Astra To the stars [Latin; Space] ADA Automatic Data Acquisitions ADA not an acronym, but the name of a new Pascal-like language ADA (Programming Language named after Agusta Ada Lovelace) ADAP Alzheimer's disease-associated protein ADAP American Discount Auto Parts [Corporate name] ADB A DeBugger ADB Apple Desktop Bus ADC Adaptive Data Compression (protocol) [Hayes] ADC Add with Carry ADC American Digital Cellular ADC Analog to Digital Converter ADC Analog to Digital Convertor ADC Analogue to Digital Converter ADCCP Advanced Data Communication Control Procedure ADCCP Advanced Data Communication Control Procedures ADCI Automatic Display Call Indicator AD&D Advanced Dungeons & Dragons ADE Automated Design Engineering ADF Automatic Direction Finder ADF Automatic Document Feed .ADF Adapter Description File (file name extension) [IBM] ADL Address Data Latch ADLAT Adaptive Lattice Filter ADLC Advanced Data Link Controller ADLE Active iDLE ? [GEC] ADM ADMiral ADMA Advanced DMA Controller SAB82258 ADMD Administrative Management Domain [X.400] ADN Abbreviated Dialing Number .ADN Add In Utility (file name extension) [Lotus 1-2-3] [LDC] ADP Adenosine Di-Phosphate ADP Administrative Data Processing ADP Advanced Data Processing ADP Automatic Data Processing ADPCM Adaptive Differential Pulse Code Modulation ADPCM Adaptive PCM ADPCM Pulse Code Modulation with Adaptive Quantization ADR Address ADS Advanced Digital System ADS Application Development System ADS Application Development System ADS Audio Distribution System ADS Automatic Distribution System ADS Automatic Voice System ADS Auxilary Data System ADSC Address Status Changed ADSR Attack Decay Sustain Release ADSR Attack, Decay, Sustain, Release ADT Abstract Data Type ADT Application Data Types ADT Atlantic Daylight Time ADU Automatic Dialing Unit AE Above or Equal AE Application Execution AEA American Electronics Association AEA Atomic Energy Authority AEB Analog Expansion Bus [Dialogic] AEC Atomic Energy Commission AEF American Expeditionary Force (see BEF) AEGIS Advanced Electronic Guidance and Instrumentation System AERE Atomic Energy Research Establishment [UK] AERM Alignment Error Rate Monitor AF Adventures in Fantasy AF Air Force AF Audio Frequency AF Auxilary carry Flag AFACTS Automatic FACilities Test System AFADS Automatic Force Adjustment Data System AFAIK as far as I know AFATDS Advanced Field Artillery Tactical Data System AFB Air Force Base AFC American Football Conference AFC Automatic Flight Control AFC Automatic Font Change AFC Automatic Frequency Control AFCAC Air Force Computer Acquisition Center AFCC Air Force Communications Command AFE Analog Front End AFGE American Federation of Government Employees AFI Authority and Format Identifier (ISO 7498) AFII Association for Font Information Interchange AFIPS American Federation of Information Processing Societies AFL American Federation of Labor AFL American Football League AFLCIO American Federation of Labor and Congress of Industrial Organizations .AFM Adobe Font Metrics (file name extension) [Adobe Systems] AFNOR Association Francaise de NORmalization AFP Appletalk Filing Protocol AFS Andrew File System AFSC Air Force Systems Command AFSCME American Federation of State, County and Municipal Employees AFSK Automatic Frequency Shift Keying AFTRA American Federation of Television and Radio Artists AG Adjutant General AG Arcade Game AG Attorney General AGC Automatic Gain Control AGCT Army General Classification Test AGND Analog Ground AGR Advanced Gas-cooled Reactor AH Avalon Hill (major war game manufacturer) AH Avalon Hill (major wargame manufacturer) AHL American Hockey League AHQ Air HeadQuarters AHQ Air HeadQuaters AI Activate Indication (C/I channel code) AI Analog Input AI Artificial Insemination AI Artificial Intelligence AI Artificial Intelligence AIA Applications Integration Architecture [DEC] AIAA American Institute of Aeronautics and Astronautics AIC Automatic Intercept Center AICC Automatic Intercept Communications Controller AID Agency for International Development AIDA An Interactive Debugging Aid [GEC] AIDDE Ames' Interactive Dynamic Display Editor AIDS Acquired ImmunoDeficiency Syndrom AIIM Association for Information and Image Management AIOD Automatic Identificated Outward Dialing AIOD Automatic Identification Outward Dialing AIS Alarm Indication Signal AIS Automatic Intercept System AISB Association of Imaging Service Bureaus AISP Association of Information Systems Professionals AIT Advanced Information Technology AIU AI Upstream AIX Advanced Interactive Executive [IBM] AIX Advanced Interactive eXecutive (IBM's name for UNIX) AIX Advanced Interactive eXecutive (unix) AK Alaska AKA Also Known As AL Alabama AL American League (baseball) ALA American Library Association ALA Automobile Legal Association ALBM Air-to-Land Ballistic Missile ALBO Automatic Line BuildOut ALC Arithmetic and Logic Circuits ALC Automatic Level Control ALC Automatic Load Control ALE Address Latch Enable ALE Adress Latch Enable ALFE Analog Line Front End ALGOL ALGOrhythmic computer Language ALGOL ALGOrithmic Language ALGOL Algorithmic Language (see IAL) ALI Automatic Location Indentification ALIT Automatic Line Insulation Testing [telephony] ALPAQ Active Link Pack Area Queue[MVS] ALR Advanced Logic Research, Inc. ALRU Automatic Line Record Update ALS Advanced Launch System [Space] ALS Automated List Service ALT Alternate (mode) ALU Arithmetic Logic Unit ALU Arithmetic Logic Unit AM Administrative Module AM Amplitude Modulation AM Ante Meridiem (before noon) A&M Agricultural and Mechanical AMA American Medical Association AMA Automatic Message Accounting [telephony] AMACS AMA Collection System AMANDDA Automated Messaging and Directory Assistance AMARC AMA Recording Center AMARC Automatic Message Accounting Recording Center AMASE AMA Standard Entry AMAT AMA Transmitter AMATPS AMA TeleProcessing System AMBA Association of Master of Business Administration AMC Add-on Module Connector (-> SIPB) AMC Albany Medical College AMD Active Matrix Display AMD Advanced Micro Devices [Corporate name] AMD Advanced Micro Devices, Inc. AMEX AMerican EXpress [Corporate name] AMI Alternate Mark Inversion Code AMI Alternate Mark Inversion (see also NRZ, NRZI, B8ZS) AMMA Advanced Memory Management Architecture [Everex Systems] AMORC Ancient Mystic Order Rosae Crucis AMP Adenosine MonoPhosphate AMPAS Academy of Motion Picture Arts and Sciences AMPAS Acedemy of Motion Picture Arts and Sciences AMPS Advanced Mobile Phone Service (standard analog cellular telephone technology used in North America and elsewhere) AMRAAM Advanced Medium Range Air-To-Air Missile AMROC American Rocket Company [Space] AMSAT radio AMateur SATellite Corporation AMU Atomic Mass Unit AMVET AMerican VETeran AN Associated Number ANA American Nurses Association ANA Automatic Number Announcement ANAC Automatic Number Announcemnt Circuit [telephony] ANC All Number Calling [telephony] ANC Army Nurse Corps ANCOVA Analysis of Covariance ANDF Architecture-Neural Distribution Format ANF Automatic Number Forwarding [telephony] ANG Air National Guard ANI Automatic Number Identification ANI Automatic Number Identification (see also: CLID) [telephony] ANIF Automatic Number Identification Failure ANL Argonne National Laboratory ANM Answer Message (SS7: in ISUP) ANOVA ANalysis Of VAriance ANOVA Analysis Of Variance ANPA American Newspaper Publishers Association ANS Answer Message ANSI American National Standards Institute ANSI American National Standards Institute ANZUS Australia, New Zealand, United States AO Account Of AO Analog Output AOA Abort Once Around [NASA, Shuttle] AOC Advice of Charge (I.256 B) AOE Application Operating Environment [AT&T] AOF Advanced Operating Facilities [CTL Modular One] AOL Absent Over Leave (see AWOL) AOS Academic Operating System AOS Add Or Subtract AOS Alternate Operator Service [telephony] AOSS Auxilliary Operator Service System AP Additional Premium AP Adjunct Processor AP All Points AP Application (OSI Layer 7) AP Application Processor AP Associated Press [Corporate name] AP Attached Processor A/P Accounts Payable A/P Accounts Payable APA Adaptive Packet Assembly APA All Points Addressable APA All Points Addressable APA American Psychological Association APA Arithmetic Processing Accelerator APAL Array Processor Assembly Language [ICL] APAR Authorized Program Analysis Report [IBM] APAREN Address Parity Enable [IBM] APB All Points Bulletin APC AMARC Protocol Converter APCUG Association of PC User Groups APD Avalanche Photo Diode APDA Apple Programmers and Developers Association API Application Interface API Application Program Interface API Application Programming Interface API Application Programming Interface APICS American Production and Inventory Control Society ApJ Astrophysical Journal APL A Programming Language APL A Programming Language (Mathematics) APM Advanced Power Management [IBM OS2] APO Alpha Pi (?) Omega, service fraternity APO Army Post Office APP Applications Portability Profile .APP Application (file name extension) [R:Base] APPC Advanced Peer-to-Peer Communications APPC Advanced Program to Program Communication (IBM) APPC Advanced Program-to-Program Communication (protocol) [IBM] APPI Advanced Peer-to-Peer Internetworking APPN Advanced Peer-to-Peer Networking [IBM] APR Annual Percentage Rate (as in loan interest) APS Asynchronous Protocol Specification APS Automatic Protection Switch APSE ADA Programming Support Environment APSE Ada Programming Support Environment APT Address Pass Through APT Automatically Programmed Tools AQ Accumulator-Quotient register AR Activation Request (C/I channel code) AR Address Register AR Alarm Report AR Arkansas A/R Accounts Receivable A/R Accounts Receivable ARC Agricultural Research Council ARC AIDS-related complex ARC American Red Cross ARC Applied Research of Cambridge ARC Audio Response Controller .ARC Archive (file name extension) ARCA Advanced RISC Computing Architecture ARCNET Attached Resource Computer local area NETwork ARCOFI Audio Ringing Codec Filter PSB2160 ARCOS ARCOFI Coefficient Support Program ARCOTI SIPB Telephone Module ARD AR Downstream ARGS Advanced Raster Graphics System [Sigma] ARIS Audichron Recorded Information System ARL Activation Request Local loop (C/I channel code) ARL Adjusted Ring Length ARLL Advanced Run Length Limited ARM Activation Request Maintenance (C/I channel code) ARM Asynchronous Response Mode ARM Asynchronous Response Mode ARMA Association of Records Managers and Administrators ARN Activation Request ARO After Receipt of Order ARP Address Resolution Protocol ARP Address Resolution Protocol [Novell] ARPA Advanced Research Projects Agency ARPA Advanced Research Projects Agency (of the USA DoD, see DARPA) ARPANET ARPA NETwork [USA] ARPL Adjust Requested Privilege Level ARQ Automatic Repeat Request ARQ Automatic Repeat Request ARRL Amateur Radio Relay League ARS Alternate Route Selection ARSB Automated Repair Service Bureau ARTIC A Real-Time Interface Copressor [IBM] ARU Activation Request Upstream ARU Audio Response Unit ARU Audio Response Unit ARV American Revised Version AS Anglo-Saxon AS3AP ANSI SQL Standard Scalable and Portable ASA Acetyl Salicylic Acid ASA Advertising Standards Association ASA American Standards Association ASAP As Soon As Possible ASAP As Soon As Possible ASAP Automatic Switching And Processing ASAS Atkins Stress Analysis System ASC Accredited Standards Committee .ASC ASCII text (file name extension) ASCAP American Society of Composers, Authors, and Publishers ASCC Automatic Sequence-Controlled Calculator ASCC2 Advanced Serial Communication Controller SAB825?? ASCII American National Standard Code for Information Interchange ASCII American Standard Code for Info'n Interchange [character code] ASCII American Standard Code for Information Interchange ASCII American Standard Code for Information Interchange ASCOP Editing and statistical analysis package ASDIC Anti-Submarine Detection Investigation Committee (British for sonar) ASDSP Application-Specific Digital Signal Processor ASE Application Service Element ASG Automated Sciences Group ASHRAE American Society of Heating, Refrigerating and Air-conditioning Engineers, inc. ASIC Application Specific Integrated Circuit ASIC Application-Specific Integrated Circuit ASIS American Society for Information Science ASIT Advanced Security and Identification Technology ASL Adaptive Speed Levelling ASM Analog Subscriber Module ASM Auxilary Storage Manager .ASM Assembler Source Language (file name extension) ASM2 Auxilary Storage Manager 2 ASM-2 Auxilary Storage Manager 2 ASME American Society of Mechanical Engineers ASN Abstract Syntax Notation One (ISO/CCITT ASN.1) ASOC Administrative Service Oversight Center ASP Aggregated Switch Procurement ASP ARCOFI Signal Processor ASP Association of Shareware Professionals ASP ASynchronous Protocol ASPEN Automatic System for Performance Evaluation of the Network ASPI Advanced SCSI Programming Interface [Adaptec] ASPS Advanced Signal Processing System ASR Automatic Send-Receive ASR Automatic Send/Receive ASR Automatic Speech Recognition ASRB Astronomy Space & Radio Board [SERC] ASSR Autonomous Soviet Socialist Republic AST AST Research, Inc. (initials of founders: Albert Wong, Safi Qureshey, Thomas Yuen) AST Atlantic Standard Time ASV American Standard Version ASYNC Asynchronous AT Access Tandem AT Advanced Technology AT Atlantic Time AT Attention ATA AT Bus Attachment ATA Automatic Trouble Analysis ATACC Advanced Tactical Air Command Central ATB Advanced Technology Bomber (stealth bomber) ATB All Trunks Busy ATC Air Traffic Control ATC Automatic Transmission Control ATD Asynchronous TDM ATDP Attention Dial Pulse ATDT Attention Dial Tone ATE Automated Test Equipment ATE Automatic Test Equipment ATF Advanced Technology Fighter ATG Advanced Technology Group ATH Abbreviated Trouble History ATH Attention Hang-Up ATI Automatic Test Inhibit ATI Awake TI ATIS Atherton Tools Interface Specification ATIS Automatic Transmitter Identification System ATLAS Pioneering computer designed at Manchester Univ'y in the 1960s ATM Adobe Typeface Manager ATM Analog Trunk Module ATM Asynchronous Transfer Mode ATM Asynchronous Transfer Mode ATM Automated Teller Machine ATM Automatic Teller Machine ATMS Automated Trunk Measurement System ATN Augmented Transition Network ATO Abort To Orbit [NASA, Shuttle] ATOMS AT&t Optimized Materials Simulator ATP Adenosine TriPhosphate ATP All Tests Pass ATPCO Airline Tariff Publishing COmpany ATR Alternate Trunk Routing ATR Automatic Terminal Recognition ATRS Automated Trouble Reporting System ATS Administrative Terminal System ATS Apple Terminal Services ATT American Telephone & Telegraph (normally written AT&T when seperate) ATT Atlantic Telegraph & Telephone AT&T American Telephone and Telegraph AT&T American Telephone and Telegraph ATTC Automatic Transmission Test and Control circuit ATTCOM AT&T COMmunications ATTIS American Telephone and Telegraph Information Systems [Division of AT&T?] ATTIS AT&T Information System ATTN Attention ATTRIB Attribute (also ATR) ATV All Terrain Vehicle AU Access Unit AU Allocation Unit [SERC] AU Astronomical Unit (93,000,000 miles) [Space] AUCBE Advisory Unit for Computer Based Education AUDIT Automated Data Input Terminal AUDIX AUDio Information eXchange AUI Attached Unit Interface AUI Attachment Universal Interface AUP Access Unit Port AUP Appropriate Use Policies [Internet] AUS Allocation UnitS AUS Army of the United States AUTO Automatic AUTODIN AUTOmatic DIgital Network AUTOVON AUTOmatic VOice Netework AUTOVON AUTOmatic VOice Network AUX Auxiliary AUXF AUXillary Frame AV AudioVisual AVA Audio Visual Authoring [IBM] AVC Audio Visual Connection [IBM] AVD Alternate Voice Data AVG Average AVI Audio Visual Interleaved [Microsoft] AVLIS Atomic Vapor Laser Isotope Separation AW (Ger) termination resistor AWACS Airborne Warnings And Control Systems AWEA American Wind Energy Association AWI Awake Indication AWK al Aho, peter Weinberger, brian Kernighan (pattern scanning language) AWOL Absent WithOut Leave (also Absent Without Official Leave) (see AOL) AWRE Atomic Weapons Research Establishment [UK] AX Architecture Extended AX Automatic Transmission AXAF Advanced X-ray Astrophysics Facility [Space] AZ Arizona B Book B1302 Benson 1302, a popular drum plotter on SERCnet MUMs B42S Board 42 Simulator [GEC] B6ZS Bipolar with 6 Zero Subsitution B8ZS Binary 8 Zero Substitution (see also NRZ, NRZI, AMI) B8ZS Bipolar with 8 Zeros Substitution (T1 PRI) B911 Basic 911 BA Bachelor of Arts BA Basic Access BA British Aerospace BAA British Airports Authority BABBAGE not an acronym, but the GEC language named after Charles Babbage BABS British Airways Booking System BACH Business Alliance for Commerce in Hemp BAFO Best And Final Offer BAK Binary Adaption Kit [Microsoft] .BAK Backup (file name extension) BAKT (Ger) Basic Access Concentrator BAL Basic Assembly Language BAM Boyan Action Module BAMAF BELLCORE AMA Format BAMX (Ger) Basic Access MUX BAN Binary Addressable Network BANCS Bell Administrative Network Communications System BAPCO Bellsouth Advertising & Publishing COmpany BARRNet Bay Area Regional Research Network (SF Bay Area) BARTS Bell Atlantic Regional Timesharing BAS Basic Activity Subset (T.62, BAS of OSI session layer) .BAS Basic Language (file name extension) BASIC Beginner's All-purpose Symbolic Instruction Code BASIC Beginner's All-purpose Symbolic Instruction Code BASIC Beginners All-purpose Symbolic Instruction code BASM Built-In Assembler .BAT Batch Processing (file name extension) BB Bases on Balls BB Best of Breed BB Bunnies and Burrows BBA Bachelor of Business Administration BBB Better Business Bureau BBC British Broadcasting Corporation BBD0/1 Binary 0s or 1s detected in B and D channels BBL Barrel BBN Bolt, Beranek, and Newman, Inc. [Corporate name] BBP Basic Block Protocol BBS Bulletin Board System BC Battlecars BC Before Christ BC British Columbia BC/BS Blue Cross/Blue Shield BCC Block Check Character BCC Blocked Call Cleared BCCP Bearer CCP BCD Bad Conduct Discharge BCD Binary Coded Decimal BCD Binary Coded Decimal [character code] BCD Blocked Call Delayed BCDIC Binary Coded Decimal Interchange Code BCE Before the Common Era (substitute for BC) BCL Batch Command Language BCNU Be Seeing You [Net Jargon] BCP Bulk Copy Program BCP Byte Control Protocol BCP Byte Controlled Protocals BCP Byte Controlled Protocols BCPL Basic Combined Programming Language BCPL Basic Computer Programming Language BCPL Bootstrap Combined Programming Language BCR Byte Count Register BCRG Bubble Chamber Research Group [RAL] BCS Bachelor of Commercial Science BCS Batch Change Supplement BCS Binary Compatibility Standard BCS Boston Computer Society BCS British Computer Society BD Bachelor of Divinity BD Bank Draft BD Bills Discounted BDAM Basic Direct Access Method [IBM] BD&D Basic Dungeons & Dragons BDF Binary Distribution Format BDOS Basic Disk Operating System BDS Basic Data Service BDS Building Design Scheme [ARC] BDT Billing Data Transmitter BE Below or Equal BE Bill of Exchange BEF Band Elimination Filter BEF British Expeditionary Force (see AEF) BEL Bell BELCORE BELL COmmunications REsearch BELLCORE Bell Communications Research BEM Bug Eyed Monster BENELUX BElgium, NEtherlands, and LUXembourg BENSON not an acronym, makers of plotters etc. BER Bit Error Rate BERA British Educational Research Association BERDYNE a program for analysis of linear dynamic behaviour of structures BERSAFE a program suite for finite element analysis BERT Bit Error Rate Test BERT Bit Error Rate Test/Tester BEST Borland Enhanced Support and Training BETRS Basic Exchange Telecommunications Radio Service BF Bad Flag BF Brought Forward B/F Background/Foreground BFA Bachelor of Fine Arts BFD Big F***ing Deal BFHD Big Fat Hairy Deal BGE Branch if Greater or Equal .BGI Borland Graphic Interface (file name extension) BGT Branch if Greater Than BH Boot Hill BHC Busy Hour Call(s) BHI Branch if Higher BHIS Branch if Higher or Same BHP Brake HorsePower BI Binary Input BIB Backward Indicator Bit (SS7) .BIB Bibliography (file name extension) BICS Building Industry Consulting Services [telephony] BICU Bus Interface Control Unit BID Bis In Die (twice a day) BIFIFO Bidirectional FIFO BIM Beginning of Information Marker .BIN Binary (file name extension) BINAC Binary Automatic Computer BIOC Break Into Other Computers BIOS Basic Input Output System BIOS Basic Input/Output System BIR Bit Receiver BIR Bus Interface Register BIS Business Information System BIS Business Information System BISDN Broadband ISDN [telephony] BISP Business Information System Program BISYNC Binary Synchronous Communications BiSync Binary Synchronous Communications (BSC is preferred) [IBM] BiSYNC (See BSYNC) BIT BInary digiT BIT Binary digit Bit BInary digiT BIT Bit Transmitter BITNET Because It's Time Network BITNET Because It's Time Network BITNET Because-It's-Time NETwork BITR Bit Transceiver BIU Bus Interface Unit BIX Byte Information Exchange (BBS) .BK! Backup (file name extension) [WordPerfect] BKSP Backspace BL Backlit BL British Leyland BLA Blocking Acknowledgement (SS7: in ISUP) BLAST BLocked ASynchronous Transmission BLAST Blocked Asynchronous Transmission (protocol) [Communications Research Group] .BLD BASIC Bload Graphics (file name extension) BLDL BuiLD a List[MVS] BLDR process loader service module [GEC] BL/DS Busy Line/Don't Answer BLE Branch if Less or Equal BLERT BLock Error Rate Test BLF Busy Lamp Field [telephony] BLF Busy Line Field BLK Block BLMC Buried Logic Macrocell BLO Blocking (SS7: in ISUP) BLOB Binary Large Object BLOS Branch if Lower Or Same BLS Business Listing Service BLT Bacon Lettuce & Tomato BLT Bacon, Lettuce, and Tomato (sandwich) BLT Becon, Lettuce and Tomato BLT BLock Transfer [raster graphics operation] BLV Busy Line Verification BM Basal Metabolism BM Bowel Movement BMA Bank Marketing Association BMA British Medical Association BMC Basic Multiplexer Channel[GEC] BMDP BioMeDical computer Programs for data analysis [UCLA] BMEWS Ballistic Missile Early Warning BMI Branch if Minus BMIC BusMaster Interface Controller [Intel] BMO Ballistic Missile Office BMOC Big Man On Campus BMP Batch Message Processing Program .BMP Bitmap Graphics (file name extension) [Windows] BMR Basal Metabolism Rate BMU Basic Measurement Unit (DIP) BNC Bayonet Neill Concelman (connector) [electronics] (see also TNC) BNE Branch if Not Equal BNF Bachus-Naur Form BNF Backus-Naur Form BNF British Nuclear Fuels BNOC British National Oil Corporation BNS Billed Number Screening BNW BensoN Writer module [on some SERCnet GEC computers] BO Binary Output BO Body Odor BO Branch Office BO Buyer's Option BOC Bell Operating Companies BOC Bell Operating Company BOC British Oxygen Company BOD Board Of Directors BOF Birds Of a Feather BOM Beginning Of Message BOM Bill Of Materials BOMP Bill Of Materials Processor BOOTP Bootstrap Protocol [Internet] BOOTP Bootstrap Protocol [Internet] BOP Bit Oriented Protocol BOP Byte Oriented Protocol BOQ Bachelor Officers' Quarters BOQ Bachelor Oficers' Quarters BOR Basic Output Report BORPQU Borland Pro Quattro BORQU Borland Quattro BORSCHT Battery, Overvoltage, Ringing, Supervision, Coding, Hybrid Test BORSCHT Battery, Overvoltage, Ringing, Supervision, Coding, Hybrid, Testing BOS Basic Operating System BOS Bit Oriented Signaling BOS Business Office Supervisor BOSIX Biin Open System Interface eXtension BOSS Billing and Order Support System BOT Beginning Of Table BOT Beginning Of Tape BOT Beginning of Tape BOT Board of Trade BP Base Pointer BP Blood Pressure BP British Petroleum BP British Pharmacopoeia BPAM Basic Partitioned Access Method [IBM] BPB BIOS Parameter Block BPI Bits Per Inch BPI Bits Per Inch BPI Bytes Per Inch BPL Branch if Plus BPOC Bell Point Of Contact BPOE Benevolent and Protective Order of Elks BPS Bits Per Second BPS Bits Per Second BPS British Psychological Society BPS Bytes Per Second BPSK Binary PSK BPSS Basic Packet-Switching Service BR Bad Register BR Bills Receivable BR Bit Robbing (CAS-BR) BR British Rail BRAT Business Residence Account Tracking system BRCS Business Residence Custom Service BRG Baud Rate Generator BRI Basic Rate Interface BRI Basic Rate Interface (ISDN) [telephony] BRI Brain Response Interface BRIEF Basic Reconfigurable Interactive Editing Facility BRL army Ballistic Research Laboratory BRM Basic Remote Module BRS Bibliographic Retrieval Service BRS Bibliographic Retrival Service BS Bachelor of Science BS Backspace BS Banded Signaling BS Batch Service module [GEC] BS Bill of Sale BSA Basic Serving Arrangements BSA Birmingham Small Arms BSA Boy Scouts of America BSAM Basic Sequential Access Method BSAM Basic Sequential Access Method [IBM] BSBH Busy Season Busy Hour BSc Bachelor of SCience BSC Binary Synchronous Communication BSC Binary Synchronous Communications (also sometimes BiSync) [IBM] BSC British Steel Corporation BSC Business Service Center .BSC Boyan Script (file name extension) [Boyan Communications] BSCM BiSynchronous Communications Module BSCS Bachelor of Science (Degree) in Computer Science BSD Berkeley Software Distribution BSD Berkely Standard Distribution BSE Basic Service Elements BSF Bell Shock Force BSF Bit Scan Forward BSI British Standards Institute BSI British Standards Institute BSI British Standards Institution BSN Bachelor of Science in Nursing BSN Backward Sequence Number (SS7) BSOC Bell Systems Operating Company BSP Bell System Practice BSR Bit Scan Reverse BSRFS Bell System Reference Frequency Standard BSS Block Started by Symbol BST Basic Services Terminal BST British Summer Time BSTJ Bell System Technical Journal BSV BASIC Bsave Graphics (file name extension) BSY Busy BSYNC Binary Synchronous Communications (protocol) BT Bit Test BT British Telecom(unications) BT Bus Terminator BTAM Basic Telecommunications Access Mathod BTAM Basic Telecommunications Access Message BTAM Basic Telecommunications Access Method [IBM] BTAM Basic Telecommunications Access Method [IBM] BTB Branch Target Buffer BTC Bit Test and Complement BTG British Technology Group BThU British Thermal Unit (BTU is preferred) BTHU BThU, British Thermal Unit BTL Bell Telephone Laboratories BTM Batch and Timesharing Monitor [Xerox Sigma] BTN Billing Telephone Number BTO Bachman Turner Overdrive BTP Batch Transfer Program BTR Bit Test and Reset BTS Bit Test and Set BTU Board of Trade Unit BTU British Thermal Unit BTW By The Way [net jargon] BU Bushido BUF Buffer BV Blessed Virgin BVA Billing Validation Application BVC Billing Validation Center BVS Basic Voice Service BWI Baltimore-Washington International (airport) BWI Baltimore-Washington Internationmal (airport) BWI British West Indies BWM Block-Write Mode BWM Broadcast Warning Message BWT Broadcast Warning TWX BWTS BandWidth Test Set BX Base eXchange (see also PX) BX Base eXchange (see PX) BYTE basic unit of data, character BYTE Binary Element String BYTE name of an American computing magazine C C Programming Language C Computer Game C programming language (successor to B, which was based on BCPL) C programming language, successor to BCPL C The C programming language [Unix] .C C source code (file name extension) [C] CA CAble CA California CA Chartered Accountant CA Chief Accountant CA Chronological Age CA Collision Avoidance (as in CSMA/CA) CA Computer Automation [the Company] CAA Civil Aviation Authority CAB Civil Aeronautics Board CABS Carrier Access Billing System CAC Calling-card Authorization Center CAC Carrier Access Code CAC Circuit Administration Center CAC Customer Administration Center CACM Communications of the Association for Computing Machinery CAD Computer Aided Design CAD Computer Aided Design (also CAD/CAM) CAD Computer Aided Dispatch CADC Computer Aided Design Centre [Cambridge] CADCAM Computer Aided Design Computer Aided Manufacture CAD/CAM Computer Aided Design Computer Aided Manufacture CADD Computer Aided Design and Drafting CADMAT Computer Aided Design, Manufacture and Test CADV Combined Alternate Data/Voice CAE Common Applications Environment CAE Common Applications Environment CAE Computer Aided Engineering CAE Computer Aided Engineering CAFS Content Addressable File Store [ICL] CAG Column Address Generator CAI Call Assembly Index CAI Computer Aided Instruction CAI Computer Aided Instruction CAIS Colocated Automatic Intercept System CAIS Common Apse Interface Specification CAL Calendar CAL Computer Aided Learning CAL Computer Assisted, or Aided Learning CALCOMP CALifornia COMputer Products Inc., makers of plotters etc. CALRS Centralized Automatic Loop Reporting System CALS Computer-aided Acquisition and Logistics Support CAM Common Access Method CAM Communication Access Method CAM Computer Aided Management CAM Computer Aided Manufacturing CAM Computer Aided Manufacturing (also CAD/CAM) CAM Content Addressable Memory CAM Content Adressable Memory CAM Contents Addressable Memory CAM Control Administration Module CAMA Centralized Automatic Message Accounting [telephony] CAMAC an equipment interface standard? CAMOL Computer assisted management of learning [ICL] CAMP Campaign Against Marijuana Planting CAN Cancel CAN Cancel CAN Consumer Advise Network CANC Cancel (I.451) CAP Central Arbitration Point CAP Civil Air Patrol CAP Columbia Appletalk Package CAP Common Agricultural Policy CAP Communication Application Platform CAP Computer Aided Publishing CAP Computer Analysts & Programmers [the Company] CAPD Computing To Assist Persons With Disabilities [Johns Hopkins University] CAPS Capitals (Upper Case Letters) CAPS Cassette Programming System CAR Contents of the Address part of the Register (LISP) CAR first component of a list [Lisp] CARE Committee on American Relief in Europe CAROT Centralized Automatic Reporting On Trunks CARP California Air Resources Board CAS Cannel Associated Signaling CAS Circuit Associated Signaling CAS Column Address Select CAS Communicating Applications Specification CAS Computer Aided Styling CAS Computerized Autodial System CASE Computer & Systems Equipment [the Company] CASE Computer Aided Software Engineering CASE Computer Aided Software Engineering CASL Crosstalk Application Scripting Language [DCA] CASS Computer Assisted Search Service CASSIS Classification and Search Support Information System CASSIS Classified and Search Support Information System CAT a catalogue of files [GEC] CAT Computer Aided Testing CAT Computer Aided Testing CAT Computer Aided Tomography CAT Computer Aided Transcription CAT Computer Assisted, or Aided Teaching CAT Computer-Aided Tomography CAT Concatenate CAT Craft Access Terminal .CAT Catalog (file name extension) CATIS Common Applications and Tools Integration Services CATLAS Centralized Automatic Trouble Locating and Analysis System CATS Computer Assisted Training System CATV Common Antenna TeleVision CATV Community Antenna TeleVision CATV Community Antenna Television CAV Constant Angular Velocity CAV Constant Angular Velocity CAVU Ceiling And Visability Unlimited CAVU Ceiling And Visibility Unlimited CAW Channel Address Word [IBM] CB Citizens Band radio CBA Change Back Acknowledgement (SS7: in MTP) CBA Critical Block Analyser [GEC] CBC Canadian Broadcasting Corporation CBCR Channel Byte Count Register CBD Cash Before Delivery CBD Change Back Declaration (SS7: in MTP) CBD Commerce Business Daily CBEMA Computer and Business Equipment Manufacturers' Association CBL Computer Based Learning CBL Computer Based Learning .CBL COBOL source code (file name extension) CBP Common Base Policy [SERC] CBR Chemical, Biological, Radiological warfare CBS Columbia Broadcasting System CBS CrossBar Switching CBT Computer Based Training CBW Chemical and Biological Warfare CBW Convert Byte to Word CBX Computer-Controlled Branch Exchange CBX Computerized Branch eXchange CC Carbon Copy CC Central Control CC Cluster Controller CC Common Channel (CAS-CC) CC Common Control CC Connection Confirm CC Country Code (ISO 7498) CC1 Call Control 1 (IOS) CCA Computer Content Architecture (ISO 8637/2) CCA Computer Corporation of America [Corporate name] CCBS Completion of Call to Busy Subscribers (I.253 C) CCC Canadian Committee on Cataloging CCC Canadian Committee on Cataloguing CCC Central Computing Committee [SERC] CCC Central Control Complex CCC Civil(ian) Conservation Corps CCC Command, Control, and Communications (sometimes C^3) CCC Command, Control, Communications [Military computing term] CCC Computer Control Center CCC Computing Consultative Committee [Computer Board] CCC Concourse Computer Center [MIT] CCCCM CCC CounterMeasures (sometimes C^3CM) CCCI Command, Control, Communications, and Intelligence CCD Catalogue Create and Delete [GEC] CCD Central Computing Division [RAL] CCD Charge Coupled Device (see CID) CCD Charge-Coupled Device CCD Charged-Coupled Device CCDM Central Computing Development Meeting CCFT Cold Cathode Fluorescent Tube CCH Connections per Circuit per Hour CCI Computer Carrier Interrupt CCI Computer Carrier Interupt CCI Computer Consoles, Incorporated CCIP Continuously Computed Impact Point CCIR Comite' Consultatif International des Radio Communications CCIR Consultative Committee for Radiocomunication CCIRN Coordinating Committee for Intercontinental Research Networking CCIS #7 Common Channel Interoffice Signaling (Japan, SS #7 Subset) CCIS Common Channel Interoffice Signaling [telephony] CCITT Comite' Consultatif International de Telegraphique et Telephonique CCITT Consultative Committee for International Telegraph and Telephone CCITT International Consultative Committee on Telephony and Telegraphy CCNC CCS Network Control CCNC Common Channel Network Controller CCNC Computer/Communications Network Center CCON Catalogue CONnect [GEC] CCP Call Control Part CCP Computing Coordinators Panel [SERC] CCP Console Command Processor CCR Clock Configuration Register CCR Commitment, Concurrency, and Recovery CCR Continuity Check Request (SS7: in ISUP) CCR Creedence Clearwater Revival CCR Customer-Controlled Reconfiguration CCRC Corrupt CRC (IOM2 Monitor Command) CCRM Central Computer Representatives Meeting [SERC] CCRP Continuously Computed Release Point CCS Collective Conciousness Society CCS Common Channel Signaling CCS Common Communications Support CCS Continuous Composite Servo CCS Hundred (C) Call Seconds CCS7 Common Channel Signalling (version #7) [telephony, may be AT&T specific] CCSA Common Control Switching Arrangement [telephony] CCSA Common-Control Switching Arrangement CCSC Computing & Communications Sub-Committee [SERC] CCSUM Central Computing Site Users Meeting [SERC] CCT Central Control Terminal CCTA Central Computer & Telecommunications Agency CCTA Central Computer and Telecommunications Agency CCTAC Computer Communications Trouble Analysis Center CCTV Closed Circuit TeleVision CCU COLT Computer Unit CCU Communication Control Unit CCV Calling Card Validation CCW Channel Control Word [IBM] CD Call Deflection (I.252 E) CD Carrier Detect (properly DCD) CD Certificate of Deposit CD Change Directory CD Civil Defense CD Collision Detection (as in CSMA/CD) CD Color Display CD Compact Disk CD Compact Disk CD Computing Division [RAL] C/D Control Data CDA Call Data Accumulator CDA Coin Detection and Announcement CDA Compound Document Architecture [DEC] CDA Compound Documents Architecture CDAR Customer Dialed Account Recording CDC Centers for Disease Control CDC Control Data Corporation CDC Control Data Corporation, Inc. [Corporate name] CDCF Cumulative Discounted Cash Flow CD_CHRDY Card Channel Ready [IBM] CDDI Copper Distributed Data Interface CDE Complex Data Entry CDEV Control panel DEVice CDF Combined Distributing Frame .CDF Comma Delimited Format (file name extension) CDI Circle Digit Identification CDI Connected Line Identification (I.251 C/E) CD-I Compact Disk - Interactive CDIAC Carbon Dioxide Information Analysis Center CDL Computer Design Language CDMA Code Division Multiple Access CDO Community Dial Office CDOS Concurrent Disk Operating System CDPR Customer Dial Pulse Receiver CDR Call Detail Record CDR Call Detail Recording CDR Call Dial Rerouting CDR Collision Detect input line CDR CommanDeR CDR Contents of the Decrement part of the Register [LISP] CDR remainder of a list with its first component deleted [Lisp] CD-RDx Compact Disk - Read Only Memory Data Exchange Standard CDRL Contract Data Requirements List CD-ROM Compact Disk - Read Only Memory CD-ROM Compact Disk Read Only Memory CD-RTOS Compact Disk - Real Time Operating System CDS Craft Dispatch System CDS Current Directory Structure CDS pdsman Control Buffer CDSF Commercially Developed Space Facility CDT Call Data Transmitter CDT Central Daylight Time CDU Control Display Unit CD-V Compact Disk - Video .CDX Compound Index (file name extension) [Fox Pro] CE Cache Enable CE Chemical Engineer CE Chip Enable CE Civil Engineer CE Collision Elimination CE Collision Elimination (->CSMA/) CE Common Era (substitute for AD) CE Conducted Emission (EME) CE Convert Enable CE Corps of Engineers CE Customer Engineer CEA Council of Economic Advisors CEA County Education Authority CeBIT Centrum fuer Buero und Informations-technologie (office and information technology centre) CEC Commission of the European Communities CED Committee for Economic Development CEDAR Computers in EDucation As a Resource [Imperial College] CEF Cable Entrance Facility CEG Continuous Edge Graphics CEGB Central Electricity Generating Board CEI Comparable Efficient Interconnection CEI Comparably Efficient Interconnection CEI Conducted Electromagnetic Interference CELSS Controlled Ecological Life Support System [Space] CEN European Committee of Standards CENELEC European Committee of Standards (Electrotechnics) CENS Centre d'Etudes Nucleaires de Seclay CENTO CENtral Treaty Organization CEO Chief Executive Officer CEP Connection Endpoint CEPT European Conference of Posts and Telecommunications (in French) CERFnet California Education and Research Federation Network CERN European Organisation for Nuclear Research (French: Organisation (formerly Conseil) Europeenne pour la Recherche Nucleaires) CERT Computer Emergency Response Team CET Council for Educational Technology CEV Controlled Environment Vault CEVI Common Equipment Voltage Indicator CF Carry Forward CF Coin First (payphone) [telephony] CF Cystic Fibrosis [disease] CFC Chloro-FluoroCarbon [chemical] CFC Combined Federal Campaign CFCA Communications Fraud Control Association CFD Computational Fluid Dynamics .CFG Configuration (file name extension) CFI Configurable Interface (SIPB) CFI Cost, Freight, and Insurance CFL Canadian Football League CFNR Call Forwarding No Reply (I.252 C) CFO Chief Financial Officer CFP Call Forwarding Busy (I.252 B) CFR Code of Federal Regulations CFS Catalogue Filing System [GEC] CFS2 Catalogue Filing System mark 2 [GEC] CFSM Catalogue Filing System Manager [GEC] CFU Call Forwarding Unconditional (I.252 D) CFV Call For Votes [Bitnet] CG Coast Guard CG Commanding General CGA Color Graphics Adapter CGA Color Graphics Adapter CGB Circuit Group Blocking (SS7: in ISUP) CGBA CGB Acknowledgement CGCT Compagnie Generale de Constructions Telephoniques CGE Compagnie Generale d'Electricite CG&E Cincinnati Gas & Electric CGI Computer Generated Images CGI Computer Graphics Interface CGM Computer Graphics Metafile (ISO DIS 8632) .CGM Computer Graphics Metafile (file name extension) .CGM Graph (file name extension) [Lotus 1-2-3] [LDC] CGN Concentrator Group Number CGU Circuit Group Unblocking (SS7: in ISUP) CGUA CGU Acknowledgement CH Cardboard Heroes CH ClearingHouse CH CourtHouse CH Customs House CHA Champions CHAP Challenge Authentication Protocol (protocol) CHAP CHAnnel Processor CHAP Communications HAndling Process [GEC] CHAPS Clearing House Automated Payment System CHAR Character CHCK Channel Check CHCP Change Code Page [OS/2] CHGRP Change Group CHI Chill:=Adventures into the Unknown CHI Chill: Adventures into the Unknown .CHK CHKDSK (file name extension) CHKDSK Check Disk CHMOD Change Mode CHOTS Corporate Headquarters Office Technology System CHOWN Change Owner CHP California Highway Patrol CHP CHannel Processor [ICL] CHP Chapter CHR Character CI Cubic Inches C/I Command/Indicate CIA Central Intelligence Agency [US Government] CIC Carrier Identification Codes [telephony] (10XXX codes) CIC Circuit Identification Code CIC Committee on Institutional Cooperation CIC Coordination and Information Center [CSNet] CICA Competition in Contracting Act CICS Customer Information Control System [IBM] CICS/VS Customer Information Control System/Virtual Storage [IBM] CID Caller ID [telephony] (see also: CLID, ANI) CID Central Institute for the Deaf CID Charge Injection Device (see CCD) CID Computer Integrated Design CID Connection Identification CIDIN Common Icao Data Interchange Network CIF Common Intermediate Format (for ISDN high end video) CIGAR Computer Introductory Guide And Reference [RAL] CII Call Identity Index CIL Computer Instrumentation Ltd [the Company] CIM CompuServe Information Manager CIM Computer Integrated Manufacturing CIM Computer Integrated Manufacturing CIO Chief Information Officer CIOCS Communication Input/Output Control System CIP Command Interface Port CIP Control Interface Port CIRC Circular Reference CIRR C/I Receive Register CIS CompuServe Information Service CIS Computer Information Systems CIS Customized Intercept Service CISC Complex Instruction Set Computer CISC Complex Instruction Set Computing Cislunar - The space between the Earth and the Moon CIT California Institute of Technology CIT Case Institute of Technology (part of CWRU, Cleveland, OH) CIT Circumstellar Imaging Telescope [Space] CIT Cranfield Institute of Technology CIX Compulink Information Exchange CIXR C/I Transmit Register CK Checkbits CKD Count Key Data (device) CKS Clock select bit CLADP Cambridge Linear Analysis and Des'n Package [control engin'g] CLAR Channel Local Address Register CLASP Comprehensive Logistics Automated Support Program CLASS Centralized Local Area Selective Signaling CLASS Custom Local Area Signaling Service [telephony] CLC Clear Carry Flag CLD Clear Direction Flag CLDN Calling Line Directory Number CLEI Common-Language Equipment Identification CLI Call-Level Interface CLI Clear Interrupt Flag CLI Command Line Interface CLI Command Line Interpreter CLID Calling Line IDentification [telephony] (see also: CID, ANI) CLIP Calling Line Identification Presentation (I.251 C) CLIR Calling Line Identification Restriction (I.251 D) CLIST Command List CLK Clock CLK Clock CLLI Common-Language Location Identification CLNP Connectionless Network Protocol .CLP Clipboard (file name extension) [Windows] CLPA Cold Link Pack Area[MVS] CLR Combined Line and Recording CLRC Circuit Layout Record Card CLS Clear Screen CLS Connectless-Mode Service CLT Communications Line Terminal CLTS Clear Task Switch Flag CLU Chartered Life Underwriter CLUT Color LookUp Table CLV Constant Linear Velocity CLV Constant Linear Velocity CM Centimeter CM Congregation of the Mission CM Connection Memory CM Control Mark CM Corrective Maintenance CM Corrective Maintenance CMA Concert Multi-thread Architecture CMAC Centralized Maintenance and Administration Center CMC Call Modification Completed (SS7: in ISUP) CMC Communication Machinery Corporation CMC Communication Mangement Configuration CMC Complement Carry Flag CMC Construction Maintenance Center CMD Centralized Message Distribution .CMD Command (file name extension) CMDF Combined Main Distributing Frame CMDS Centralized Message Data System CMI Computer Managed Instruction CMIP Common Management Information Protocol CMIP Common Management Information Protocol CMIS Common Management Information Services CMIS Common Management Information System CML Computer Managed Learning CML Current Mode Logic CML Current Model Logic CMMU Cache/Memory Management Unit CMMU Cache/Memory Management Unit [Motorola] CMOS Complementary Metal Oxide Semiconductor (see MOS) CMOS Complementary Metal-Oxide Semiconductor CMOT Common Management Information Services and Protocol Over TCP/IP CMP Compare CMP Computer CMPS Compare word String CMR Call Modification Request (SS7: in ISUP) CMRJ CMR reject (SS7: in ISUP) CMRR Common Mode Rejection Ratio CMS Call Management System CMS Circuit Maintenance System CMS Code Management System CMS Communications Management Subsystem CMS Compiler Monitor System CMS Conversation Monitor System CMS Conversational Monitor System [IBM] CMS Conversational Monitoring System CMSG Common Management Study Group CMSgt Chief Master Sergeant CMT Cellular Mobile Telephone CMU Carnegie Mellon University, Pittsburgh, Pennsylvania CMU Carnegie-Mellon University CMU COLT Measurement Unit CMU Control & Monitoring Unit CMY Cyan-Magenta-Yellow (color model) CMYK Cyan, Magenta, Yellow, blacK CMYK Cyan-Magenta-Yellow-Black (color model) CN Canadian National (railroad) [Corporate name] CN Canadian National (railways) CN Change Notice CN Connection CNA Communications Network Application CN/A Customer Name/Address [telephony] CNAB Customer Name/Address Bureau CNC Computer Numerical Control CNC Computerized Numerical Control CNCC Customer Network Control Center .CNF Configuration (file name extension) CNG Calling (tone) CNI Common Network Interface [telephony, AT&T department] CNMS Cylink Network Management System CNN Cable News Network CNO Chief of Naval Operations CNR Canadian National Railways CNR Carrier to Noise Ratio CNRI Corporation for National Research Initiatives CNS Central Nervous System CNS Complimentary Network Service CNSS Core Nodal Switching Subsystem [Internet] CNV Conventional (pertaining to Memory) CNVT Convert CO Cash Order CO Central Office CO Central Office [telephony] CO Colorado CO Command Output CO Commanding Officer CO Conscientious Objector CO Convert Out C/O in Care Of CO3 ICL communications protocol COA Change Over Acknowledgement (SS7: in MTP) COAM Customer Owned And Maintained COB Close Of Business .COB COBAL source code (file name extension) COBOL COmmon Business Oriented Language COBOL Common Business-oriented Language (See HLL) COC Call of Cthulhu COC Circuit Order Control COCOT Customer Owned, Coin Operated Telephone [telephony] COCOT Customer-Owned Coin-Operated Telephone COD Collect On Delivery; Cash On Delivery .COD Code List (file name extension) CODASYL COnference on DAta SYstem Languages CODASYL Conference on Data System Languages (Group that designed COBOL) CODCF Central Office Data Connecting Facility CODEC COder-DECoder CODEC Coder/Decoder CODIL Context dependent information language [Brunel] COE Central Office Equipment COEES COE Engineering System COEM Commercial Original Equipment Manufacturer COER Central Office Equipment Report COGO Coordinate Geometry (Programming Language) COL Collision COL Computer Oriented Language COLA Cost-Of-Living Allowance COLP Connected Line Identification Presentation (I.251 E) COLR Connected Line Identification Restriction (I.251 F) COLT Central Office Line Tester COM Computer Output [on] Microfiche COM Computer Output [on] Microfilm COM Computer Output on Microfilm .COM Command (file name extension) COM1 First serial Port (asynchronous port) COM2 Second serial Port COM3 Third serial Port COM4 Fourth serial Port COMAL COMmon Algorithmic Language COMAS Central Office Maintenance and Administration System COMDEX Computer Dealers Exposition COM/EXP PCM-Compander/Expander COMGEN COMment GENerator [GEC] COMIT a string manipulation system COMM COMMand process [GEC] COMM Communications COMP Compare + Communications COMPACT COMmercial Product ACquisition Team COMPEDA CAD software supplier [qv GAELIC, DRAGON, PDMS] COMSAT Communications Satellite Corporation COMSAT COMmunications SATellite [Space] CON Console (includes Keyboard and Screen) CONF Conference Calling (I.254 A) CONFIG Configuration CONN Connect Message (I.451) CONN CONNector CONN route of CONX in module DMAN [GEC] CONS Connection-Oriented Networking Session CONS CONStruct (LISP) CONTAC Central Office NeTwork ACcess CONUS CONtinental United States CONX data management stream CONneXion [GEC] COO Change Over Order (SS7: in MTP) COP Call Offering Procedure COPPER Control Of Peripherals, Priorities, Enquiry and Report CORAL Computer On-line Real-time Applications Language CORC Commands and Responses Definition and Compressing Program (IOS) CORE COntrolled Requirement Expression CORN COmputer Resource Nucleus CORNET CORperate NETwork CorNet Corporate Network Protocol (ECMA and CCITT Q.930/931 oriented) COS Compatible Operating System COS Connection-Mode Service COS Core Operating System COS Corporation for Open Systems COSMIC COmmon System Main InterConnecting frame COSMIC COmmon Systems Main InterConnection frame system COSMIC COmputer Software Management and Information Center COSMOS COmputer System for Mainframe OperationS COSMOS Computer System for Mainframe Operations COSMOS COmputerized System for Mainframe OperationS COT Central Office Terminal (opposite to RT) COT Continuity (SS7: in ISUP) CP Canadian Pacific CP Chemically Pure CP Command Post CP Command Processor CP Control Program CP CoPy CP Copy Protected CP the Canadian Press CPA Certified Public Accountant CPA Certified Public Accountant CPA Critical Path Analysis CPC Cellular Phone Company CPC Circuit Provisioning Center CPD Central Pulse Distributor CPD Common Packet Data Channels CPE Central Processing Element CPE Central Program Exchange [Wolverhampton Poly] CPE Computer Performance Evaluation CPE Customer Premise Equipment CPE Customer Premises Equipment CPE Customer Provided Equipment CPE Customer Provided Equipment CPE Customer-Premises Equipment CPFF Cost Plus Fixed Fee CPG Call Progress (SS7: in ISUP) CPG Clock Pulse Generator CPH Cost Per Hour CPI Characters Per Inch CPI Characters Per Inch CPI Clock Per Instruction CPI Common Programming Interface CPI Common Programming Interface [IBM] CPI Computer Private branch exchange Interface .CPI Code Page Information (file name extension) [MS-DOS] CPI-C Common Programming Interface for Communications [IBM] CPL Combined Programming Language CPL Command Procedure Language [Prime] CPL Current Privilege Level CPM Cards Per Minute CPM Control Program for Microcomputers (sometimes CP/M) CPM Control Program Monitor (sometimes CP/M) CPM Cost Per Minute CPM Critical Path Method CP/M Control Program for Microcomputers CP/M Control program for microcomputers [Digital Research] CPMP Carrier Performance Measurement Plan CPO Chief Petty Officer CPO Chief Post Office CPO Customer Premises Equipment CPR Canadian Pacific Railway CPS Characters Per Second CPS Characters Per Second + Cycles Per Second CPSE Campus Packet Switch Stream Exchange CPSR Computer Professionals for Social Responsibility CPT CaPTain CPT Command Pass Through CPU Central Processing Unit CPU Central Processing Unit CP-V Control Program 5 [Xerox Sigma] CPW Certified Public Weigher CQ Change of Quarters CQ Charge of Quarters CQM Circuit Group Query (SS7: in ISUP) CQR CQM Response CR Carriage Return CR Carriage Return (ASCII 15 octal) CR Control Response CRA Computer Retailers Association CRAF Comet Rendezvous/Asteroid Flyby [Space] CRAM Card Random Access Memory CRAS Cable Repair Administrative System CRC Chemical Rubber Company CRC Customer Record Center CRC Cyclic Redundancy Check CRC Cyclic Redundancy Check CRC Cyclical Redundancy Character CRCOK CRC ok! (C/I channel code) .CRD Cardfile (file name extension) CRED Credit Card Calling (I.256 A) CREF Connection Refused CREG Concentrated Range Extension with Gain CREG Concentrated Range Extention with Gain CREN Computer Research Education Network CREN Corporation for Research and Educational Networking CREN The Corporation for Research and Educational Networking (merge of BITNET and CSNet) CRF Cross Reference File CRFMP Cable Repair Force Management Plan CRIS Customer Record Information System CR/LF Carriage Return/Line Feed CROM Control Read Only Memory CRRES Combined Release and Radiation Effects Satellite [NASA] CRS Centralized Results System CRSAB Centralized Repair Service Answering Bureau CRT Cathode Ray Tube CRT Cathode Ray Tube (also generic reference to a terminal) CRTC Canadian Radio-television and Telecommunications Commission CRTC CRT Controller CRUS Computer Resource UnitS CS Cable Switching CS Chip Select + Clear to Send + Code Segment CS Civil Servant CS Computer Science CS Conducted Susceptibility (EMS) CS County Seat C&S Chivalry & Sorcery CSA Carrier Serving Area CSA Common Service Area CSA Computing Services Association [MVS] CSA Confederate States of America CSAB Computing Sciences Accreditation Board CSACC Customer Service Administration Control Center CSACS Centralized Status, Alarm and Control System CSALLOC USER IPM route of STOR [GEC] CSAR Centralized System for Analysis Reporting CSAR Channel System Address Register CSC Cell Site Controller CSC Computer Sciences Corporation CSD Corrective Service Disk [IBM] CSDC Circuit Switched Digital Capability CSDN Circuit-Switched Data Network (T.70) CSE Circuit Switching Exchange CSF Course Structuring Facility [IBM] CSF Critical Success Factor CSG Constructive Solid Geometry CSG Consulting Services Group [Lotus] CSI Commercial Systems Integration CSIS Canadian Security and Intelligence Service CSL Coin Supervising Link CSL Computer Sensitive Language CSL Control & Simulation Language CSM Command Sergeant Major CSMA Carrier Sense Multiple Access CSMA Carrier Sensing Multiple Access CSMA/ Carrier Sense Multiple Access CSMA/CA Carrier Sense Multiple Access with Collision Avoidance CSMACD Carrier Sensing Multiple Access with Collision Detection CSMA/CD Carrier Sense Multiple Access with Collision Detection CSMA/CD Carrier Sense Multiple Access/Collision Detection CSMA/CD Carrier Sense Multiple Access/with Collision Detection CSMP Continuous System Modelling Program [IBM] CSNET Computer + Science Network (merged with BITNET to make CREN) CSNET Computer Science Network CSNET Computer Science NETwork [USA] CSO Central Services Organization CSO Cold Start Only (in EOC) CSOC Consolidated Space Operations Center (at Colorado Springs) CSOC Consolidated Space Operatons Center (at Colorado Springs) CSP Commercial Subroutine Package CSP CompuCom Speed Protocol [CompuCom] CSP Control Switching Point CSPDN Circuit-Switched Public Data Network CSR Clock Shift Register CSR control & status register [DEC] CSR Control and Status Register CSR Customer Service Representative [telephony] CSRG Computer Systems Research Group CSRS civil Service Retirement System CSS Computer Sub-System CSS Continuous System Simulator (Language) CSS Customer Switching System CST Call State or Current State or Change State (quasi SDL) CST Central Standard Time CST Current Segment Table [GEC] CST0 Current Seg't No. 0 (normal local variables & global data) [GEC] CST1 Current Seg't No. 1 (program data & Fortran COMMON) [GEC] CST2 Current Seg't No. 2 (data segments for program use) [GEC] CST3 Current Seg't No. 3 (holds the current code module) [GEC] CSTA Computer-Supported Telephony Applications CSU Channel Service Unit CSU Channel Service Unit CSV Comma-Separated Variables CSW Channel Status Word [IBM] CT Call Transfer (I.252 A) CT Central Time CT Connecticut C&T Chips and Technologies CTC Canadian Transport Commission CTC Central Test Center CTC Centralized Traffic Control [railroad] CTC Centralized Traffic Control (railways) CTCChannel - to Channel CTD Computing and Telecommunications Division CTIO Cerro Tololo Inter-american Observatory CTL Computer Technology Limited [the Company] CTM Contac Trunk Module CTMC Communications Terminal Module Controller CTMS Carrier Transmission Measuring System CTNE Compania Telefonica Nacional de Espana CTO Call Transfer Outside CTOS Computerized Tomography Operating System CTPA Coax-to-Twisted-Pair Adapter CTRL Control CTS Clear To Send CTS Clear To Send CTSS Compatible Time Sharing System CTSS Compatible Time-Sharing System [MIT] CTSS Cray Time Sharing System CTT Cartridge Tape Transport CTTC Cartridge Tape Transport Controller CTTN Cable Trunk Ticket Number CTV Canadian TeleVision network CU Close-Up CU Control Unit CU Customer Unit CUA Common User Access CUA Common User Access [IBM] CUB Cursor Backward CUCRIT Capital Utilization CRITeria CUD Cursor Down CUDF Call User Data Field CUDN Cambridge University Data Network CUF Cursor Forward CUG Closed User Group (I.255 A) CUI Common User Interface [IBM] CUL See You Later [net jargon] CUP Cursor Position CUPID Completely Universal Processor I/O Design [AST] .CUR Cursor (file name extension) CUTE Clarkston University Terminal Emulator CU/TK Common Update/EQuipment system CUU Cursor Up CV Curriculum Vitae CVF Compressed Volume File [Microsoft] CVGA Color Video Gaphics Array CVIA Computer Virus Industry Association CVIO Cold Virtual Input/Output[MVS] CVOL system Catologue VOLume CVR Compass Voice Response CVT Communications Vector Table [IBM] CVW CodeView for Windows CW Call Waiting (I.253 A) CW Car Wars CW Chemical Warfare CW Child Welfare CW Churchwarden CW Churdwarden CW Continuous Wave CWC City-Wide Centrex CWD Convert Word to Double Word CWIS Campus Wind Information Systems [Internet] CWO Cash With Order CWO Chief Warrant Officer CWRU Case Western Reserve University CXI Common X-windows Interface CY Calendar Year CYL Cylinder CYMK Cyan-Yellow-Magenta-Black (color model) CYO Catholic Youth Organization CZ Canal Zone D Depth D2T2 Dye Diffusion Thermal Transfer (printing) DA Days after Acceptance DA Department of Agriculture DA Deposit Account DA District Attorney DA Don't Answer [used in telephony, may be more general] D/A Digital to Analog D/A Digital to Analog converter (also DAC) DAA Data Access Arrangement DAA Decimal Adjust for Addition DAC DAP Access Controller [ICL] DAC Data Acquisition and Control DAC Digital to Analog Converter DAC Digital to Analog Converter DA/C Directory Assistance Computerized DACCS Digital Access Cross Connect System [telephony] (suspect, see below) DACD Digital & Analogue Circuit Design DACK DMA ACK DACOM Data Communictions Corporation of Korea (ROK) DACS Digital Access Cross-connect System [telephony] DACS Directory Assistance Charging System DAD Draft ADdendum DAEDR Delimitation, Alignment and Error Detection Procedure DAIS Distributed Automatic Intercept System DAL Data Access Language [Apple Computer] DAL Dedicated Access Line [telephony] DAL Disk Access Lockout DAM Data Acquisition and Monitoring DA/M Directory Assistance Microfilm DAML Digital Added Main Line (pair gain) DAP Data Access Protocol [DEC] DAP Data Access Protocol [DEC] DAP Distributed Array Processor [ICL] DAP Division Advisory Panel [of NSF DNCRI] DAP Document Application Profile DAR Daughters fo the American Revolution DAR Daughters of the American Revolution DARC Division Alarm Recording Center DARI Database Application Remote Interface [IBM] DARPA Defence Advanced Research Projects Agency DARPA Defense Advanced Research Projects Agency (of the USA DoD, see also ARPA) DARPA Defense ARPA DARU Distributed automatic intercept system Audio Response Unit DAS Decimal Adjust for Subtraction DAS Directory Assistance System DAS Distributor And Scanner DASD Direct Access Storage Device DASD Direct Access Storage Device [IBM] DASS2 Digital Access Signaling System 2 (BT, DPNSS subset) DAS-WDT Distributor And Scanner-Watch Dog Timer DAT Digital Audio Tape DAT Digital Audio Tape + Disk Array Technology DAT Dynamic Address Translation .DAT Data (file name extension) DATA Defense Air Transport Administration DATACOM Data Communications DATEX German public packet switching network DAV Data Above Voice DAV Disabled American Veterans DB Data Base DB Data Buffer DB DataBase db decibel(s) [unit] DB2 Database 2 DBA Data Base Administrator DBAC Data Base Administration Center DBAS Data Base Administration System DBCS Data Bank Control System DBCS Double-Byte Character Set DBF DBase Format .DBF Database (file name extension) DBM Data Base Manager DBM DataBase Manager DBME DataBase Managment Environment DBMS Data Base Management System DBMS DataBase Management System (see also RDBMS) DBOS Data Bank Organization System DBOS Data Base organisation subroutines [ARC] DBP (Ger) German Federal Post DBRAD Data Base Relational Application Directory DBS Data Base Server DBS Duplex Bus Selector DBSS Data Bank Security System DC Data Collection DC Data Communication DC Data Control DC Device Cinfirmation (C/I channel code) DC Device Control DC Direct Current DC Direct Current (see also AC) DC District of Columbia DCA Defense Communications Agency DCA Digital Communications Associates DCA Distributed Communication Architecture DCA Document Content Architecture DCA Document Content Architecture DCAF Distributed Console Access Facility [IBM] DCAT Directory CreATe [GEC] DCB Data Control Block [IBM] DCB Disk Coprocessor Board [Novell] DCC Data Country Code (ISO 7498) DCC Descriptive Cataloging Committee DCC Descriptive Cataloguing Committee DCC Digital Compact Cassette + Display Combination Code DCCO Defense Commercial Communications Office DCCS DisContiguous Shared Segments DCD Data Carrier Detect DCD Data Carrier Detect (sometimes CD) DCDM Dispersed Computing Development Meeting [RAL] DCE Data Circuit-terminating Equipment DCE Data Communication Equipment DCE Data Communications Equipment DCE Distributed Computing Environment [OSF] DCE Distributed Computing Equipment DCF Data Communication Facility [IBM] DCF Data Compression Facility DCF Data Count Field [IBM] DCF Discounted Cash Flow DCF Document Composition Facility DCF Driver Configuration File [Lotus] DCH D Channel Handler DCH D-Channel Handling bit DCL Data Clock (IOM2) DCL DEC Command Language [DEC] DCL DEC Control Language DCL Declaration DCL Device Clear DCL Digital Command Language [DEC] DCL Digital Command Language [Digital] DCL Digital Control Logic DCLU Digital Carrier Line Uint DCM Digital Carrier Module DCME Digital Circuit Multiplexing Equipment DCMS Distributed Call Measurement System DCMU Digital Concentrator Measurement Unit DCn Device Control n DCON Directory CONnect [GEC] DCP Distributed Communications Processor DCP Duplex Central Processor DCPR Detailed Contuing Property Record (PICS/DCPR) DCPSK Differential Coherent Phase-Shift Keying DCPU Data Communication Protocols Unit [DoI] DCS Data Collection System DCS Data Communications Subsystem DCS Data Control System DCS Desktop Color Separation DCS Digital Crosconnect System DCS Distributed Computing Systems [SERC] DCT Digital Carrier Trunk DCT Discrete Cosine Transform .DCT Dictionary (file name extension) D-CTL D Channel Controller (IDEC) DCTN Defense Commercial Telecommunications Network DCTS Dimension Custom Telephone Service DCX Digital Concentrating eXchange [CASE] DD Daredevils DD Data Dictionary DD Data Downstream (IOM2) DD Day + Digital Display + Double Density DD Days after Date DD Demand Draft DD Dishonorable Discharge DD Dishonourable Discharge DD Disk Drive DD Doctor of Divinity D&D Dungeons & Dragons DDB Device Dependent Bitmap DDC Digital Data Converter DDC Direct Department Calling DDCMP Digital Data Communications Message Protocol [DEC] DDCMP Digital Data Communications Message Protocol [DEC] DDD Direct Distance Dial(ing) DDD Direct Distance Dialing DDD Direct Distance Dialing [Telephony; principally US, elsewhere STD] DDE Direct Data Entry DDE Direct Data Entry + Dynamic Data Exchange [Microsoft] DDEL Directory DELete [GEC] DDEML Dynamic Data Exchange Manager Library [Microsoft] DDI Direct Dial In DDI Direct Dialing-In (I.251 A) DDK Device Driver Kit [Microsoft Windows] DDL Data Definition Language + Data Description Language DDL Data Description Language DDL Document Description Language DDM Distributed Data Management DDN Defense Data Network DDP Distributed Data Processing DDS Dataphone Digital Service [AT&T] DDS Design Data Sheet + Digital Data Storage DDS Digital Data Service DDS Digital Data System DDS Digital Dataphone Service DDS Direct Digital Service DDS Doctor of Dental Science DDS Doctor of Dental Surgery DDT DichloroDiphenylTrichloroethane DDT Dynamic Debugging Technique [DEC] DDX Digital Data Exchange DDX Distributed Data eXchange DE Data Efficiency [the Company] DE Delaware DEA Drug Enforcement Agency DEAC Deactivation (C/I channel code) DEAR Department of Energy Acquisition Regulation DEB Data Environment Block [IBM] DEB Data Extent Block [IBM] DEC Decrement DEC Device Clear DEC Digital Equipment Corporation DEC Digital Equipment Corporation [Corporate name] DECT Digital European Cellular Phone DECUS Digital Equipment Computer Users Society DEE (Ger) data terminal .DEF Definitions + Defaults (file name extensions) DEL Delete DEL Delete .DEM Demonstration (file name extension) DEQUE Double-Ended QUEue DERP Defective Equipment Replacement Program DES Data Editing System DES Data Encryption Standard + Data Entry Sheet DES Data Encryption Standard [NIST] DES Department of Education & Science .DES Description (file name extension) DESY Deutsches Electronen SYchlotron DET Detatch Message (I.451) DET Device Execute Trigger DEV Device DEW Distant Early Warning (as in DEW Line) DEW Distant Early Warning (line) DF Damage Free DF Data Field DF Destination Field DF Device Flag DF Direction Finding DF Double Flag D/F Direction Finding DFC Data Flow Control DFC Distinguished Flying Cross DFD Data Flow Diagram DFDR Disc Filing DRiver [GEC] DFE Data Flow Editor DFI Digital Facility Interface DFM Distinguished Flying Medal DFMS Digital Facility Management System DFR RAL program replacing DEFAULT ROUTING command [Feb 1983] DFS Depth-First Search DFS Distributed File System DFT Diagnostic Funtion Test DFT Discrete Fourier Transform DFT Distributed Function Terminal DFU Data File Utility DFW Dallas Fort Worth (regional airport) DG Data General [Corporate name] DG Data General [the Company] DG Dei Gratia (by the grace of God) DG Director General DGIS Direct Graphics Interface Standard DGSC Defense General Supply Center DHHS Department of Health and Human Services .DHP Doctor Halo PIC (file name extension) DHSS Department of Health and Social Security (UK) DI Data In DI Destination Index DI Deactivation Indication (C/I channel code) DIA Document Interchange Architecture DIA Document Interchange Architecture [IBM] DIAD (magnetic) Drum Information Assembler / Dispatcher DIAL Direct Information Access Line DIAS Defense Automatic Integrated System DIB Device Independent Bitmap DIBOL DEC Business Oriented Language DIBOL DIgital Business Oriented Language [DEC] DIC Digital Concentrator DIC Digital Interface Controller DIC Distributed Interactive Computing [SERC] .DIC Dictionary (file name extension) DID DI Downstream DID Direct Inward Dialing DID Direct Inward Dialing [telephony] DIE Disabled Interrupt Exit DIF Data Interchange Format DIF Digital Interface (Frame) DIF Document Interchange Format DIFFSENS Differential Sense DIGON (Ger) digital local network (Berlin) DIIP Direct Interrupt Identification Port DIM Data In the Middle DIN Deutsch Industrie Norm DIN Deutsche Industrie Norm (German equivalent of EIA) DIN Deutsches Institut fur Normung DIO Data Input-Output DIP Document Interchange Protocol (lower sublayer of OSI layer 6) DIP Dual In-line Package DIP Dual In-line Package + Dual In-line Pin DIR Direction DIR Directory (file) DIRE Dire Is Really Emacs DIS Disconnect DIS Draft International Standard (ISO) DIS Dynamic Impedance Stabilization [CompuCom] DISA Direct Inward System Access DISC Disconnect (LAP-D Command, I.451) DISD Direct Inward Subscriber Access DISOSS Distributed Office Support System [IBM] DISP Displacement (offset) DIU Deactivate Indication DIU Digital Interface Unit DIV Divide DIV (Ger) digital exchange DIVF (Ger) DIV for long distance service DIVO (Ger) DIV for local service DIW D-Inside Wire [AT&T] DIY Do It Yourself DJ Disc Jockey DJ Dump Job DJC Dependent Job Control DL Daresbury Laboratory [SERC] DL Data Language DL Download DL/1 Data Manipulation Language 1 [IBM] DL5MDA someone who collects each ISDN abbrevation crossing his way DLA Defense Logistics Agency DLAB Divisor Latch Access Bit DLC Data Link Control DLC Data Link Control (protocol) [IBM] DLC Digital Loop Carrier DLCI Data Link Connection Identifier (I.440: SAPI+TEI) DLCU Digital Line Carrier Unit DLCULC Daresbury Laboratory Computer User Liason Committee [SERC] DLE Data Link Escape DLE Data Link Escape (ASCII Control) DLE Delete DLL Data Link Layer [ISO OSI] DLL Dial Long Line equipment DLL Dial Long Lines DLL Dynamic Link Library DLM Dynamic Link Module DLO Dead Letter Office DLR DOS LAN Requester DLS Digital Line Section DLS Digital Link Service DLTU Digital Line/Trunk Unit DLUC Digital Line Unit Control DLU-PG Digital Line Unit-Pair Gain DM Delta Modulation DM Disconnected Mode (LAP-D Response) DM Dungeon Master DMA Direct Memory Access DMA Direct Memory Access/Addressing DMAC DMA Controller DMAN Data MANagement [GEC] DMC DAP Management Committee [SERC] DMD Doctor of Dental Medicine DME Direct Machine Environment [ICL] DME Distance Measuring Equipment DME Distributed Management Environment DMF Probably part of an X.400 address in Europe DMI Digital Multiplexed Interface DML Data Manipulation Language DML Data Manipulation Language DML Data Manipulation Logic DMM Digital Multimeter DMMS Dynamic Memory Management System DMOS Diffusion Metal Oxide Semiconductor (see MOS) DMOS Diffussion Metal Oxide Semiconductor (see MOS) DMOS Double-diffused Metal Oxide Semiconductor DMOS Double-diffused Metal-Oxide Semiconductor DMP Dot Matrix Printer DMS Data Management Software + Data Management System DMS Data Management System DMS Digital Multiplexed System DMSD Digital Multistandard Decoding DMTF Desktop Management Task Force DMU Data Manipulation Unit DMV Department of Motor Vehicles (Calif) DMY Day Month Year DMZ DeMilitarized Zone DN Directory Number DN Down DNA DeoxyriboNucleic Acid DNA Digital Network Architecture DNA Digital Networking Architecture [DEC] DNA Dioxyribonucleic Acid DNC Direct Numerical Control DNC Direct Numerical Control DNC Dynamic Network Controller DNCRI [NSF] Division of Networking and Communications Research and Infrastructure DNHR Dynamic Non Hierarchical Routing DNHR Dynamic NonHierarchical Routing DNIC Data Network Identification Code [telephony ISO 7498] DNIS Dialed Number Identification Service DNIS Dialed Number Identification Service (see also DID) [telephony] DNL Director of Naval Laboratories DNR Dialed Number Recorder [telephony] DNS Domain Name System DNS Domain Naming System DNX Dynamic Network X-connect DO Data Out DOA Dead On Arrival DOB Date Of Birth DOC Dynamic Overload Control .DOC Document + Documentation (file name extensions) DOCS Display Operator Console System DOD (American) Department of Defense DOD Department Of Defense DoD Department of Defense [US Government] DOD (USA) Dept. of Defense DOE Department of Energy DoE Department of Energy [US Government] DOI Department of Industry [UK] DOJ Department Of Justice DOM Data On Master group DOMAIN Distributed Operating Multi Access Interactive Network (Apollo) DOS Disc Operating System DOS Disk Operating System DOS Disk Operating System DOSEM DOS Emulation DOST Disc Operating System for Testing [GEC] ? DOT Department Of Transportation [US Government] DOT&E Director, Operational Test and Evaluation DOTS Digital Office Timing Supply DOV Data Over Voice [telephony] DOW Day Of Week DP Data Processing DP Data Processing DP Demarcation Point DP Diagnostic Process [GEC] DP Dial Pulse [telephony] DP Displaced Persons (expelled from native land) DP Display Postscript DP Double Play DP Draft Proposal DPA Delegation of Procurement Authority DPA Demand Protocol Architecture [3Com] DPAC Dedicated Plant Assignment Center DPAM Demand Priority Access Method DPANS Draft Proposed American National Standard DPAREN Data Parity Enable [IBM] DPB Drive Parameter Block DPC Destination Point Code (SS7) DPC Direct Program Control DPCM Differential PCM DPE Data Path Extender DPI Dots Per Inch DPI Dots Per Inch DPL Descriptor Privilege Level DPLL Digital Phase Locked Loop DPM Digital Panel Meter DPMA Data Processing Management Association DPMI DOS Protected Mode Interface [Microsoft] DPN-PH Data Packet Network-Packet Handler DPNSS Digital Private Network Signaling System (BT) DPO Data Phase Optimization DPP Discounted Payback Period DPS Display PostScript DPSK Differential Phase Shift Keying DPSK Differential Phase Shift Keying DPSK Differential Phased-Shift Keying DPtoTP Display Coordinates to Tablet Coordinates (converting) DQ Dairy Queen DQ Dragon Quest DQDB Distributed Queue Dual Bus (IEEE 802.6) [telephony, networking] DQL Database Query Language DR Data Ready DR Data Receive DR Data Received DR Deactivate Request (C/I channel code) DR Deactivation Request DR Dead Reckoning DR Dining Room DR Disk Reader D/R Direct or Reverse DRAC Directory Record ACcess [GEC] DRAD Directory Record Allocate & Delete [GEC] DRAGON draughting aid for CAD [Compeda] DRAM Dynamic RAM DRAM Dynamic Random Access Memory DRAM Dynamic Random Access Memory (as opposed to static RAM) DRAW Direct Read After Write DRCS Dynamically Redefinable Character Sets DRD Data Reading Device DRDA Distributed Relational Data Architecture [IBM] DRDW Direct Read During Write DRE Direction DRE Directional Reservation Equipment DRG Democratic Republic of Germany (East Germany) DRI Defense Research Internet DRI Digital Research Incorporated DRI Digital Research, Incorporated [Corporate name] DRMU Digital Remote Measurement Unit DRO Data Request Output + Destructive Read-Out DRS Data Rate Select DRS Distributed Resource Sharing [ICL] .DRS WordPerfect Driver Resource (file name extension) DRV Drive .DRV Device Driver (file name extension) (Also see .DVR) .DRW Draw + Drawing (file name extensions) DS Data Segment + Data Send + Data Server + Double Sided DS Data System [IBM] DS Digital carrier Span DS Digital Signal DS Direct Signal DS Double-Sided DSA Dial System Assistance DSBAM Double-SideBand Amplitude Module DSC Digital Subscriber Controller Am79C30A DSDC Direct Service Dial Capability DSDD Double Sided, Double Density (diskette) DSE Data Storage Equipment DSE Data Structure Editor DSEA Display Station Emulation Adapter DSECT Dummy Control Section DSEE Domain Software Engineering Environment DSGLA (Ger) DLS DSHD Double Sided, High Density (diskette) DSI Digital Speech Interpolation DSIA DEC Systems Interconnection Architecture DSL Dynamic Simulation Language DSM Digital Switching Module DSM Distinguished Service Medal DSMX (Ger) digital signal multiplexer DSN Digital Signal (level) N DSO Distinguished Service Order DSP Decessit Sine Prole (died without issue) DSP Digital Signal Processing DSP Digital Signal Processing DSP Digital Signal Processor DSP Digital Signal Processor DSP Domain Specific Part (ISO 7498) DSPL De-SPooLer [GEC] DSQD Double Sided, Quad Density (diskette) DSR Data Set Ready DSR Data Set Ready DSR Device Status Register DSR Device Status Report DSR Dynamic Service Register DSRI Digital Standard Relational Interface DSS Data Station Selector DSS Decision Support System DSS Decision Support System DSS Direct Station Selection [telephony] DST Daylight Saving Time DSTN Double SuperTwisted Nematic DSTN Double Supertwisted Nematic DSU Data Service Unit DSU Data Servicing Unit DSU Digital Service Unit DSU Disc Space Unit, 256 bytes on a RAL-supported GEC DSW Data Status Word + Device Status Word DSX Digital System X-connect DT Data Through (C/I channel code in test mode) DT Data Transmit DT Delirium Tremens DT Di-group Terminal DT1 Data Form Class 1 DTA Disk Transfer Area .DTA Data (file name extension) DTAM Document Transfer Access and Manipulation DTAS Digital Test Access System DTC Digital Telephone Controller (ARCOFI + IBC + ICC) DTC Digital Trunk Controller DTC Di-group Terminal Controller DTD Document Type Definition DTE Data Terminal Equipment DTE Data Terminal Equipment + Dumb Terminal Emulator DTF Dial Tone First payphone [telephony] DTG Direct Trunk Group DTIF Digital Transmission Interface Frame DTL Diode-Transistor Logic DTL Diode-Transistor Logic DTM Digital Trunk Module DTMF Dial Tone Multi Frequency [telephony] DTMF Dual Tone Multi Frequency [telephony] DTP DeskTop Publishing DTP Desktop Publishing DTR Data Terminal Ready DTR Data Terminal Ready + Data Transfer Rate DTU Di-group Terminal Unit DU Data Upstream (IOM2) DU Deactivation Request Upstream (C/I channel code) DU Disk Usage DUAT Direct User Access Terminal DUI Driving Under the Influence DUP Data User Part DUT Device Under Test DUV Data Under Voice DV Deo Vo lente (God willing) .DV DESQview Script (file name extension) DVA (Ger) data processing equipment DVI Digital Video Interactive DVM Digital Volt Meter DVM Doctor of Veterinary Medicine .DVR Device Driver (file name extension) (see also .DRV) DVX Digital Voice eXchange DWAPS Defense Warehousing Automated Processing System DWG Drawing DWI Driving While Intoxicated DWIM Do What I Mean DX Distance (as in long distance radio communication) DX Distance (as in long distance rado communication) .DXB Drawing Interchange Binary (file name extension) [AutoCAD] DXC Data Exchange Control DXF Drawing Interchange Format DXT Data eXtractT facility DYRECT SIDES Dynamic Real Time Communication Tester E East E Espionage E911 Enhanced 911 EA Expedited Data Acknowledgement (SS7: in SCCP) EA Extended Adress EA Extended Attribute [OS/2] EADAS Engineering and Administrative Data Acquisition System EADAS/NM - EADAS/Network Management EADASS Engineering and Administrative Data AcquiSition System EAEO Equal Access End Office EAN Certainly part of an X.400 Address in Europe EARN European Academic Research Network EARN European Academic Research Network EAROM Electrically Alterable Read Only Memory EAROM Electrically Alterable Read-Only Memory EARS Electronic Access to Reference Services EAS Engineering Administration System) EAS Extended Announcement System EAS Extended Area Service EASD Equal Access Service Date EATA Enhanced AT Bus Attachment EB Engineering Board [SERC] EBC EISA Bus Controller EBCC Engineering Board Computer Committee [SERC] EBCDIC Expanded Binary Coded Decimal Interchange Code [character code] EBCDIC Extended Binary Coded Decimal Interchange Code EBCDIC Extended Binary Coded Decimal Interchange Code [IBM] EBCDIC Extended Binary Coded Decimal Interexchange Code EBI Equivalent Background Input EBI Extended Background Investigation EBL Electron Beam Lithography EBT Electronic Benefits Transfer EC Echo Canceller EC European Community EC Exchange Carrier [telephony] ECAFE Economic Commission for Africa and the Far East ECAL Enjoy Computing And Learn ECAP Electronic Customer Access Program ECASS Electronically Controlled Automatic Switching System ECASS Export Control Automated Support System ECB Event Control Block [IBM] ECC Enter Cable Change ECC Error Check Code ECC Error Checking and Correction ECC Error Correcting Code ECC Error Correction Code ECCM Electronic Counter-CounterMeasures ECCS Economic C (hundred) Call Seconds ECD Enhanced Color Display ECDO Electronic Community Dial Office ECF Enhanced Connectivity Facility ECG Electrocardiogram ECHO European Commission Host Organisation ECL Emitter Coupled Logic ECL Emitter Coupled Logic (see also TTL) ECLSS Environmental Control and Life Support System [Space] ECM Electronic Counter Measure ECM European Common Market ECMA European Computer Manufactueres Association ECMA European Computer Manufacturers Association ECMA European Computer Manufacturers Association ECO Ecological ECO Electronic Central Office ECO Engineering Change Order E-COM Electronic Computer Originated Mail ECP Enhanced Capabilities Port [Microsoft] ECPA Electronic Communications Privacy Act [US law] ECPT Electronic Coin Public Telephone ECS Electronic Crosconnect System ECT Electro-convulsive Therapy ECT ElectroConvulsive Therapy ECTL Electronic Communal Temporal Lobe ECV Electric Cargo Vehicle [NASA OEXP] ED Erase Display EDA Embedded Document Architecture [Go Corporation] EDAC Electromechanical Digital Adapter Circuit EDC Enhanced Data Correction EDC Error Detection and Correction EDC External Disc Controller [GEC] ED&D Expert Dungeons & Dragons EDDC Extended Distance Data Cable EDGAR Electronic Data Gathering, Analysis, and Retrieval EDI Electronic Data Interchange EDI Electronic Data Interchange EDI Electronic Document Interchange [DEC] EDIF Electronic Design Interchange Format EDIFACT EDI for Administration Commerce and Transport EDIUC Edinburgh Decsystem-10 Installation Users Committee [SERC] EDLC Ethernet Data Link Control EDLIN Editor (Line Text) EDO Extended Duration Orbiter [Space] EDOS Enhanced DOS for Windows EDP Electronic Data Processing EDP Electronic Data Processing EDPM Electronic Data Processing Machine EDS Electronic Data Systems EDSAC Electronic Delay Storage Automatic Computer EDSAC Electronic Delay-line Storage Arithmetic Computer(?) [Cambridge] EDSI Enhanced Small Device Interface EDSX Electronic Digital Signal X-connect EDT Eastern Daylight Time EDTA Ethylene Diamine Tetraacetic Acid EDTCC Electronic Data Transmission Communications Central EDVAC Electronic Discrete Variable Automatic Computer (1st stored-program digital computer) EE Electrical Engineer EE Electrical or Electronics Engineer EEC European Economic Community EEC European Economic Comunity EEC Extended Error Correction EECT End-to-End Call Trace EEDP Expanded Electronic tandem switching Dialing Plan EEG Electroencephalogram EEG Electroencephalogram EEHO Either End Hop Off EEI Equipment-to-Equipment Interface EEL Epsilon Extension Language EEM Extended Memory Management EEMS Enhanced Expanded Memory Specification E&EO Errors and Omissions Excepted EEPROM Electrically Erasable Programmable Read-Only Memory EFA Extended File Attribute EFF Electronic Frontier Foundation EFI Electromechanical Frequency Interference + Electronics For Imaging EFL Emitter Follower Logic EFL (Teaching) English as a Foreign Language EFRAP Electronic Feeder Route Analysis Program EFTS Electronic Funds Transfer System eg Latin, "exampli gratia": for example, literally, "free example" EGA Enhanced Graphics Adapter EGP Exterior Gateway Protocol [Internet] EHF Extremely High Frequency (30-300GHz) EIA Electronic Industries Association EIA Electronic Industry Association EIA Electronics Industries Assotiation EIn Error Indication n (C/I channel code) EIN European Informatics Network EINE EINE Is Not Emacs EIS Executive Information System EIS Expanded Inband Signaling EIS Extended Instruction Set [DEC] EISA Extended Industry Standard Architecture EISA Extended Industry-Standard Architecture EISS Economic Impact Study System EISS European Intelligence Support System EITB Engineering Industry Training Board EKG ElectroKardioGramm (see ECG) EKTS Electronic Key Telephone Sets EL ElectroLuminescent (as in display) EL Electroluminescent (display) + Erase Line ELECTRIC interactive computing environment on RAL IBM 360/195 ELF Extremely Low Frequency ELF Extremely Low Frequency ELO Electric Light Orchestra ELP Emerson, Lake and Palmer (or Powell) ELP Emerson, Lake and Palmer (the rock band) ELS Entry Level System ELV Expendable Launch Vehicle [Space] EM Electronic Mail + Expanded Memory EM Encription Module EM End of Medium (ASCII Control) EM Enlisted Man (see EW) E&M ``Ear and Mouth''; receive and transmit leads of a signalling system E&M rEceive & transMit/Ear & Mouth signaling EMA Electronic Mail Association EMA Enterprise Management Architecture EMA Environment MAnager [GEC] ? EMA Error MAnager [GEC] ? EMACS Editor MACroS EMACS Eight Megabytes And Constantly Swapping E-MAIL Electronic MAIL E-MAIL Electronic Mail EMB Extended Memory Block [LIM/AST] EMBARC Electronic Mail Broadcast to a Roaming Computer [Motorola] EMC Electromagnetic Compatibility EMC Electromagnetic Compatibility + Extended Math Coprocessor EMC External Multiplexer Channel [GEC] EME Electromagnetic Emission EMF ElectroMotive Force (voltage) EMI Electromagnetic Interference EMI Electromagnetic Interference EML Expected Measured Loss .EML Electronic Mail (file name extension) EMM Expanded Memory Manager EMP Electromagnetic Pulse EMPRESS EnvironMental Pulse Radiation Environment Simulator for Ships EMR ElectroMagetic Response EMR Electro-Magnetic Radiation EMR ElectroMagnetic Response EMS Electromagnetic Susceptibility EMS Electronic Mail System EMS Electronic Message Service EMS Electronic Message System EMS Expanded Memory Specification EMS Expanded Memory Specification [LIM] EMS Extended Memory Specification EMT Emergency Medical Technician EMU ElectroMagnetic Unit EMU Extravehicular Mobility Unit [Space] EMV EMC (German) .ENC Encoded (file name extension) ENDS Ends Segment ENFIA Exchange Network Facility for Interstate Access ENIAC Electronic Numerical Integrator and Calculator ENIAC Electronic Numerical Integrator and Computer (First fully electronic digital computer) ENQ Enquiry ENQ Enquiry ENS ENSign ENSS Exterior Nodal Switching Subsystem [Internet] EO End Office [telephony] EO Erasable Optical EOA End of Address EOB End of Block EOC Embedded Operation Channel EOC End of Conversion EOE Electronic Order Exchange EOF End Of File EOF End of File EOI End or Identify EOJ End of Job EOL End of Line + End of List EOM End of Message EOM End of Message EOM End Of Month EOQ Economic Order Quantity EOR Exclusive OR (Also XOR) EOS End of String EOS Extended Operating System EOT End Of Table + End of Tape (marker) + End of Text + End of Transmission EOT End Of Tape EOT End Of Transmission EOTT End Office Toll Trunking EOWG Engineering and Operations Working Group (under FNC) EP Expedited Data (SS7: in SCCP) EP Experience Points EP Extended Play EPA Environmental Protection Agency EPIC Extended PIC PEB2055 EPL Effective Privilege Level EPL Electronic switching system Program Language EPLD Electrically Programmable Logic Device EPM Enhanced Editor for Presentation Manager [IBM] EPOS Engineering and Project-management Oriented Support system EPP Enhanced Parallel Port EPRI Electric Power Research Institute EPROM Electrically Programmable Read Only Memory EPROM Erasable Programmable Read Only Memory EPROM Erasable Programmable Read Only Memory EPROM Erasable Programmable Read-Only Memory EPS Encapsulated PostScript .EPS Encapsulated PostScript (file name extension) EPSCS Enhanced Private Switched Communication Service EPSF Encapsulated PostScript Files EPSS Experimental Packet Switch Stream Service [now PSS] EPT Empire of the Petal Throne EQ Educational Quotient (see IQ) EQ Equalizer ER Emergency Room ER Error Register ERA Earned Run Average ERA Entity-Relationship-Attribute ERA Equal Rights Amendment ERAR Error Return Address Register ERAS Electronic Routing and Approval System [Hughes Aircraft] ERC Error Control (IOS) ERCC Edinburgh Regional Computer Centre ERD Entity-Relation Diagram ERE Entity Relationship Editor EREP Environmental Recording Editing and Printing ERL Echo Return Loss ERLL Enhanced Run Length Limited EROM Erasable Read Only Memory ERP Effective Radiated Power ERR Error ERT Earth Resources Technology [Space] ERU Error Return address Update ES Expert System ES Extra Segment ESA European Space Agency ESA European Space Agency ESAC Electronic Surveillance Assistance Center ESAC Electronic Systems Assistance Center ESB Emergency Service Bureau ESC Enhanced Speech Circuit PSB4505/6 ESC Escape ESC Escape (ASCII Control) ESCC2 Extended high level Serial Communication Controller SAB82532 ESCC8 like ESCC2, but 8 channels SAB82538 ESCON Enterprise System Connection (Architecture) [IBM] ESD Electronic Software Distribution + Electrostatic Discharge ESDI Enhanced Small Device Interface ESDI Enhanced Standard Device Interface ESE East South East ESF Extended SuperFrame (Format) ESI Enhanced Serial Interface (specification) [Hayes] ESL Emergency Stand-Alone ESL English as a Second Language [teaching] ESM Electronic Support Measures ESN Electronic Serial Number ESN Electronic Switched Network ESO European Southern Observatory ESP Emulation Sensing Processor + Enhanced Serial Port [Hayes] ESP Enhanced Service Provider ESP Extra Sensory Perception ESP Extra-sensory Perception ESPE Engineering Science Program Exchange [QMC] ESPS Entropic Signal Processing System ESS Electronic Switching System ESS Electronic Switching System [telephony] ESSEX Experimental Solid State EXchange ESSX Electronic Switching Systen eXchange EST Eastern Standard Time EST established ESU Electro-Static Unit ET Eastern Time ET Exchange Termination ET External Tank [of the US Space Shuttle] ET Extra Terrestial ET Extra Terrestrial [Space] ET ExtraTerrestial ET ExtraTerrestrial ETA Estimated Time of Arrival ET/ACC External Tank/Aft Cargo Carrier (see also ET) [Space] ETANN Electrically Trainable Analog Neural + Network (chip) [Intel] ETAS Emergency Technical ASsistance ETB End of Transmission Block ETB End of Transmission Block etc Latin, "et cetera": "and the rest" ETD Estimated Time of Departure E-TDMA Extended Time Division Multiple Access ETF Electronic Toll Fraud ETFD Electronic Toll Fraud Device [telephony] ETH Eidgnoessiche Techniche Hochschule ETHERNET - LAN standard IEEE802 [DEC, Intel, Xerox] ETN Electronic Tandem Network ETO Earth-to-Orbit [Space] ETPL Endorsed Tempest Products List ETRI Electronics and Telecommunications ETS Econometric Time Series ETS Electronic Tandem Switching ETS Electronic Translation System ETS Electronic Translator System ETSACI Electronic Tandem Switching Adminstration Channel Interface ETSSP ETS Status Panel ETV Education TeleVision ETX End of Text ETX End of Text EU Execution Unit EUCLID Extensible UCL Interactive & Distributive system [UCLCC] EUUG European Unix User Group EUV Extreme UltraViolet EVA ExtraVehicular Activity EVE Extensible VAX Editor EVGA Extended Video Graphics Array + Extended Video Graphics Adapter EVST (Ger) end exchange EVX Electronic Voice eXchange EW Electronic Warfare EW Enlisted Woman (see EM) EWOS European Workshop for Open Systems EWS Employee Written Software [IBM] EWS Enhanced work station [SERC] EWSD (Ger) electronic dialing system (Digital) .EXE Executable (file name extension) EXE2BIN Program used to convert an (.EXE) file to binary format (.COM) file EXP Exponent EXT External EXTRN External Reference FA Football Association (British soccer--a word derived from Association) FA Frame Aligner FA Fuse Alarm FAA Facility Accepted (SS7: in ISUP) FAA Federal Aviation Agency [US Government] FAB Computer-Chip Fabrication Plant FAC Facility FAC File Access Code FACD Facility Changed Message FACD Foreign Area Customer Dialing FACD Foriegn Area Customer Dialing FACS Facilities Assignment and Control System FAMOS Floating Gate Avalanche MOS FAMULUS a system for filing & retrieving information [QMCCC/UCLCC] FAMULUS database - information and retrieval system FAO Food and Agriculture Organization of the united states FAO Food and Agriculture Organization [US Government] FAP File Access Protocol FAQ Frequently Asked Question FAR Facility Request (SS7: in ISUP) FAR Federal Acquisition Regulations FAS Foreign Agricultural Service FAS Frame Alignment Signal FAS Free Alongside Ship FASST Flexible Architecture Standard System Technology FAST First Application System Test FAT File Allocation Table FAT File Allocation Table FAT Foreign Area Translation FAT Foriegn Area Translation FAX FAcsimile FAX Facsimile FAX Faximile .FAX Fax (file name extension) FB Freight Bill FBI Federal Bureau of Investigation [US Government] FC Feature Control FC Frame Control FCAP Facility CAPacity FCB File Control Block FCB File Control Block [DEC] FCB Forms Control Buffer FCC Federal Communications Commission FCC Federal Communications Commission [US Government] FCC Federal Computer Conference FCC Forward Command Channel FCCSET Federal Coordinating Committee for Science, Education and Technology (under OSTP) FCG False Cross or Ground FCI Flux Changes per Inch FCS File Control System FCS Frame Check Sequence FD Floppy Disk + Full Duplex FDA Food and Drug Administration [US Government] FDC Floppy Disk Controller FDDI Fiber Digital Device Interface FDDI Fiber Distributed Data Interface FDDI Fiber Distributed Data Interface (X3T9.5) FDHD Floppy Drive High Density FDIC Federal Deposit Insurance Corporation [US Government] FDISK Fixed Disk FDM Frequency Division Multiplexing FDM Frequency-Division Multiplexing FDMA FDM Access FDP Field Development Program FDR Fast Dump Restore FDR Franklin Delano Roosevelt [US President] FDX Full DupleX FE Finite Element FEA Finite Element Analysis FEBE Far End Block Error (IOM2 Monitor Message) FEC Forward Error Correction FECC Front End Communication Computer FED Far End Data FEDSIM FEDeral Systems Integration and Management center FEFO First-Ended, First-Out FEM Front-End Machine FEMA Federal Emergency Management Agency FEMF Foreign Electro-Motive Force FEMF Foreign EMF (a.k.a. Cross Battery) [telephony] FEMGEN Finite Element MEsh GENerator FEMVIEW Finite EleMent analysis results VIEWing program FEP Front End Processor FEP Front-End Processor FEPC Fair Employment Practices Commission FEPG Federal Engineering Planning Group (of FNC under EOWG, originally of FRICC) FEPS Facility and Equipment Planning System FERS Federal Employees Retirement System FET Federal Excise Tax FET Field Effect Transistor FET Field Effect Transistor FET Field-Effect Transistor FEV Far End Voice FF Flip-Flop + Form Feed FF Form Feed FFA Future Farmers of America FFT Fast Fourier Transform FFT Fast Fourier Transform FGA Feature Group A FG-A Feature Group A [telephony: Line Side term. for LD carriers] FGB Feature Group B FG-B Feature Group B [telephony: Trunk Side term. for LD carriers (aka ENFIA B), 950 service] FGC Feature Group C FGCLG Fortran level G, Compile, Link and Go [IBM] FGD Feature Group D FG-D Feature Group D [telephony:Trunk Side term. for LD carriers, 1+ service] FHA Federal Home Administration FHA Future Homemakers of America FHCLG Fortran level H, Compile, Link and Go [IBM] FIB Focused Ion Beam FIB Forward Indication Bit (SS7) FICA Federal Insurance Contributions Act FIDO Fog Investigation Dispersal Operation FIF Fractal Image Format FIFO First In, First Out FIFO First In First Out (as in registers and buffers) FIFO First In First Out (storage) FIFO First-In, First-Out FIFO First-In First-Out ['queue'] FILEID cms FILE IDentifier FILO First In Last Out (see also FIFO) FILO First-In, Last-Out FIMS Forms Interface Management System FIN Facility Information Message FINE FINE Is Not Emacs FIO Frequency In and Out FIOC Frame Input/Output Controller FIP Facility Interface Processor FIP File Processor Buffering FIPS Federal Information Processing Standards FIR Finite Impulse Response FIR Finite Impulse Response FIRMR Federal Information Resource Management Regulation FIS Floating-point Instruction Set FISU Fill In Signal Unit (SS7) FIT Federal Information Technologies, inc. FIX Federal Inter-agency eXchange [network] FJ Frame Jump (C/I channel code) FL Florida FLACC Full Level Algol Checkout Compiler FLC Ferro-electric Liquid Crystal FLD Field FLHE calc's steady state & transient solution for thermal problems FLL Fixed Loss Loop [telephony] FLOP FLoating point Operations Per Second FLOPS Floating Point Operations Per Second FLPL A Fortran-compiled List Processing Language FLRA Federal Labor Relations Authority FM cms Filemode FM Frequency Modulation FMAC Facility Maintenance And Control FMB Federal Maritime Board FMCS Federal Mediation and Conciliation Service FMM Finite Message Machine FMR Follow Me Roaming [telephony] FMS Financial Management Service (Treasury Dept) FMS Flexible Manufacturing System FMS Forms Management System FMS Forms Management System FMT Format FN cms Filename FNBE Far and Near end Block Error (IOM2 Monitor Message) FNC Federal Networking Council (formerly FRICC) [US Government, under OSTP] FNPA Foreign Numbering Plan Area FNT Font FO Foreign Office FO Forward Observer FOAC Federal Office Automation Center FOB Free On Board FOC Fiber Optic Communications FOC Free Of Charge FOCAL Fortran-like language on early DEC computers FOCUS an interactive symbolic debugging tool for FORT3 programs [GEC] FOCUS Forum of Control Data Users FOG First Osborne Group FOIA Freedom Of Information Act FOIMS Field Office Information Management System FOIRL Fiber Optic Inter Repeater Link [IEEE] FON Fiber Optics Network .FON Font (file name extension) .FON Phone Directory (file name extension) .FON Phone (file name extension) FOOBAR See FUBAR FOR Free On Rail .FOR FORTRAN source code (file name extension) FORCS Faa's Operational Reporting Communication System FORD Fix Or Repair Daily FORD Found On Road Dead FORTH (Programming Language) FORTRAN FORmula TRANslation FORTRAN Formula Translator (Programming Language) FOS Fibre Optics & Optoelectronics Scheme [DoI] FOSE Federal Office Systems Exposition FOSE Federal Office Systems Exposition FOSSIL Fido/Opus/Seadog Standard Interface Layer FOT Forward Transfer (SS7: in ISUP) FOT Free On Truck FOV Field Of View FP Functional Protocol FPA Floating Point Accelerator FPA Floating Point Accumulator FPA Fortran Program Analset FPC Fish Protein Concentrate FPC Frequency Comparison Pilots FPE Floating Point Engine FPGA Field Programmable Gate-Array FPHA Federal Public Housing Athority FPHA Federal Public Housing Authority FPLA Field Programmable Logic Array (see PLA) FPLA Field Programmable Logic-Array FPLA Field-Programmable Logic Array FPM Feet Per Minute FPO Feild Post Office FPO Field Post Office FPO Fleet Post Office FPP Fixed Path Protocol + Floating Point Processor FPP Floating Point Processor FPS Fast Packet Switching FPS Feet Per Second fps Feet Per Second FPS Floating Point Systems [the Company] FPS Frames Per Second FPU Floating Point Processor Unit FPU Floating Point Unit FQDN Fully Qualified Domain Name [Internet] FR Flat Rate FR80 Microfilm recorder available at RAL FRAC Frame Aligner Circuit PEB2030 FRACTAL FRACTional dimensionAL FRAG Fragment + Fragmentation FRAM Ferroelectric Random-Access Memory FRED Frame Editor FRED Fred Resembles Emacs Deliberately FRG Federal Republic of Germany (West Germany) FRG Federal Republic of Gernmany (West Germany) FRICC Federal Research Internet Coordinating Committee (now FNC) FRJ Facility Rejected Message (SS7: in ISUP) FRMR Frame Reject (LAP-D Response) FROG Free Rocket Over Ground FRPG Fantasy Role Playing Game FRPI Flux Reversals Per Inch FRQ Facility Request Message FRR Functional Recovery Routines FRS Federal Reserve System FRS Flexible Route Selection .FRS WordPerfect Graphics Driver (file name extension) FS File Separator FSC Frame Synchronization Clock (IOM2) FSD File System Driver [OS/2] FSF Free Software Foundation FSK Frequency Shift Keying FSK Frequency Shift Keying FSK Frequency-Shift Keying FSLIC Federal Savings and Loan Insurance Corporation FSN Forward Sequence Number FSS Federal Supply Service FSW Forward Swept Wings FT cms FileType FT Foot F/T Full Time FTAM File Transfer, Access and Management FTAM File Transfer and Access Method FTAM File Transfer And Management (ISO upscale FTP) FTC Federal Trade Commission FTF File Transfer Facility [ICL] FTG Final Trunk Group FTL Faster Than Light FTP File Transfer Protocol [especially TCP/IP, Internet] FTP77 File Transfer Protocol to 1977 standard FTP80 File Transfer Protocol to 1980 standard FTPQ File Transfer Protocol ('Q' end) FTS Federal Telecommunication System FTS Federal Telecommunications System [US Government] FTS Federal Telephone System [telephony] FTS Flight Telerobotic Servicer [Space] FTZ (Ger) Central Telecom Technical Office (of DBP) FUBAR Fucked Up Beyond All Recognition FUNC Function FW Fringeworthy FWD Front Wheel Drive FWHM Full Width at Half Maximum FX Foreign eXchange [telephony] FY Fiscal Year FYI For Your Information G Gravity GA Gamblers Anonymous GA General Assembly GA General Automation [the Company] GA General Availability GA General Average GA General of the Army GA Georgia GAAP Generally Accepted Accounting Principles GAAP Generally Accepted Accounting Principles GAAS GAllium ArSenide (GaAs) GAB Group Audio Bridging [telephony] GAELIC VLSI design package [Compeda] Gaia Earth's self-sustaining Biosphere GAL Generic Array Logic GAN Global Area Network GANDALF Canadian company which manufactures data comm's equipment GAO General Accounting Office [US Government] GAP (EC) Group of Analysis and Provision (for ONP) GAR Grand Army of the Republic GATT General Agreement on Tariffs and Trade GAW Guaranteed Annual Wage GAW Guarenteed Annual Wage GB Gangbusters GB Giga Bytes (or Bits), 1024 x 1024 x 1024 Gb Gigabit (1,000 megabits) (One Billion Bits of Information) GB GigaByte GB Gigabyte (1,000 megabytes) (One Billion Characters of Information) GB Great Britain GBIP General Purpose Interface Bus GBS Group Bridging Service GC Garbage Collection (LISP) GC Gas Chromatograph (or Chromatography) GC Group Card GCA Ground Controlled Approach GCC Gnu C Compiler GCD Greatest Common Multiple GCD Ground Controlled Descent GCHQ Government Communications Headquarters [UK] GCI General Circuit Interface (IOM/U(k0)-Interface) GCL Graphics Command Language GCM General Court Martial GCR General Configuration Register GCR Group Code Recording GCR Group Code Recording [mag tape] GCR Group-Coded Recording (magnetic tape, 6250 bpi) GCS Group Control System GCT Greenwich Civil Time GDA Global Data Area GDB Gnu DeBugger GDDM Graphics Data Display Manager GDG Generation Data Group GDI Graphics Device Interface GDS Geometrical Design Scheme [ARC] GDT Geometric Dimensioning and Tolerancing + Global Descriptor Table GE General Electric [corporate name, USA] GEC General Electric Company Plc. [UK] GEDIT George 3 EDITor [GEC] (it's EDIT's "real" name) GEISCO General Electric Information Services COmpany GEM Graphics Environment Manager GEM Graphics Environment Manager (DRI Program) GENIE General Electric Network for + Information Exchange GENSTAT GENeral STATistical program GEO Geosynchronous Earth Orbit [Space] GEORGE GEneral Organisational Environment [?] [ICL] GEOS Graphic Environment Operating System [Geoworks] Ger German GEROFF text formatter on SERCnet GEC computers GET Get Execute Trigger GEXEC Geologist's or General EXECutive [NERC] GHQ General HeadQuarters GHz Giga HertZ (unit of frequency, 1,000,000,000 cycles per second) GHZ GigaHertZ GHZ Gigahertz GI Galvanized Iron GI Gastro Intestinal (as in upper GI) GI General Issue GI Government Issue GID Group ID GIF Graphics Interchange Format .GIF Graphic Interchange Format (file name extension) GIGO Garbage In Garbage Out GIGO Garbage In, Garbage Out GIGO Garbage-In Garbage-Out GIMMS general-purpose geographical processing system GIN Graphics INput GINO Graphical INput & Output [CADC] GINO-F Graphical INput & Output - Fortran [CADC] GIS Geographical Information System GISS Goddard Institute for Space Studies GIX Global Internet Exchange [Internet] GKS Graphical Kernal System GKS Graphical Kernel Standard GKS Graphics Kernel System G/L General Ledger GLIM Generalised LInear Modelling GLM General Linear Models .GLY Glossary (file name extension) [Microsoft Word] GM Game Master GM General Manager GM General Motors [corporate name] GM Guided Missile GMBH Gesellschaft Mit Beschraenkter Haftung GML Generalised Markup Language GMT Greenwich Mean Time GMT Greenwich Mean Time GND GrouND GND System Ground GNP Gross National Product GNSS Global Navigation Satellite Systems (generic term for GPS and Glonass) GNU GNU's Not Unix GNU Gnu's Not Unix (operating system) GOC Graphics Option Controller [Sigma] GOES Geostationary Orbiting Environmental Satellites GOS Grade Of Service GOSIP Government Open Systems Interconnection Profile GOSIP Government Open Systems Interconnection Profile (calls for government procurement of ISO/CCITT products) GOSIP Government OSI Profile GP Gas Plasma + General Purpose GP General Practitioner GP Group Processor GPF General Protection Fault GPI Graphics Programming Interface GPI Graphics Programming Interface GPIA General Purpose Interface Adaptor GPIB General Purpose Instrumentation Bus [IEEE488 standard] GPIB General Purpose Interface Bus GPIB General Purpose Interface Bus GPIB General-Purpose Interface Bus GPL GNU General Public Licence GPO General Post Office GPO Government Printing Office GPPC General Purpose Power Controller PSB2121 GPS Global Positioning System GPS Global Positioning System [Space] GPSS General Purpose Simulation System GPSS General Purpose Systems Simulator (language) GQ General Quarters GRA GRS Acknowledgement GRB Gamma Ray Burst(er) GRD GRounD GRE Graphics Engine GREP Global Regular Expression Print, g/re/p, (UNIX command) GREP Global Regular Expression Print [UNIX] GREP Global Regular Expression Print (UNIX command) .GRF Graph (file name extension) GRO Gamma Ray Observatory [Space] GRP MOD GRouP MODulator .GRP Group (file name extension) GRS Circuit Group Reset (SS7: in ISUP) GS General Schedule GS Glide Slope GS Group Separator GSA General Services Administration [US Government] GSA Girl Scouts of America GSAT General telephone and electronics SATellite corporation GSBCA General Services administration Board of Contract Appeals GSFC Goddard Space Flight Center (Greenbelt, MD) [NASA] GSM Global System for Mobile phones (digital cellular telephony in Europe, and elsewhere) GSM Global System Mobile GSM Groupe Speciale Mobile (Committee Designing preceding) GSPC Graphics Standards Planning Committee [ACM] GSTS Ground-based Surveillance and Tracking System GT Gross Ton GTC General Telephone Company GTE General Telephone and Electric [Corporate name] GTE General Telephone Electronics GTEI Global TEI GTSI Government Technology Services, inc. GTT Global Title Transmission GUG GEC User Group [SERC, now RAL-Supported GUG] GUI Graphical User Interface GUI Graphical User Interface GVP Global Virtual Peripheral [GEC] GW Gamma World GW Gate Way GW-BASIC Gee Whiz BASIC GWEN Ground Wave Emergency Network GWY Gateway H Harn H Height H Hold state (in EOC) .H Header (file name extension) [C] H- High- HAC Hands-Free Add-On Circuit (for speakerphone) PSB45030 HACD Home Area Customer Dialing HACMP High Availability Cluster Multi-Processing [IBM] HAL Hard Array Logic HAL Heuristically Programmed Algorithmic (computer) + [from 1968 film "2001: A Space Odyssey"] HAL Heuristically programmed ALgorithmic computer (2001) HAL Heuristically programmed ALgorithmic computer [movie 2001] HAL House Programmed Array Logic HAM Hold And Modify HARM High-speed Antiradiation Missile HASP Houston Asynchronous Spooling & Priority [IBM] HASP Houston Automatic Spooling Priority (System) HASP Houston Automatic Spooling Program [IBM] Hb HemogloBin HBA Host Bus Adapter HBM Her British Majesty; His British Majesty HBO Home Box Office HC Holy Communion HC House of Commons HCFA Health Care Financing Administration HCFC hydrochlorofluorocarbon [chemical] HCL High Cost of Living HCMOS High performance CMOS HCSDS High-Capacity Satellite Digital Service HCTDS High-Capacity Terrestrial Digital Service HD Hard Disk HD Hard Disk + High Density HD Heavy Duty HDA Head Disk Assembly HDA Head Disk Assembly (in winchester disk drives) HDB3 High-Density Bipolar 3 (CEPT PRI) HDBV Host Data Base View HDCD High Definition Compatible Digital HDI Head to Disk Interference HDL High Density Lipoprotein HDLC High-Level Data Link Control HDLC High-level Data Link Control [IBM network] HDR Header HDSC High Density Signal Carrier [DEC] HDSL High-rate Digital Subscriber Link HDTV High Definition Television HDTV High Definition Television HDW Hardware HDX Half DupleX HE His Eminence; His Excellency HEAO High Energy Astronomical Observatory [satellite] HEAP Home Energy Assistance Program HEDM High Energy-Density Matter [Space] HEHO High End Hop Off HEL High Energy Laboratory HEMP Help End Marijuana Prohibition HEO High Earth Orbit [Space] HEP High Energy Physics (Division of RAL) HERC Hercules HERO Hazards of Electromagnetic Radiation to Ordnance HEX Hexadecimal HF High Fantasy HF High Frequency (3-30MHz) HFE Human Factors Engineering HFR Hardwara Failure Rate HFS Hierarchical File System HGA Hercules Graphics Adapter HGCP Hercules Graphics Card Plus HH Hour HI Hawaii HI High Impedance (C/I channel code) HI Highway Interrupt HIC Hybrid Integrated Circuit HIFD High-Density Floppy Disk HIIPS Hud Integrated Information Processing Services HIL Human Interface Link [HP] HIPO Hierarchical Input Process Output [IBM] HL IT Siemens Semiconductors (HL), Info Technics (IT) HLC Heavy Lift Capability [Space] HLCO High Low Close Open HLL High Level Language HLL High-Level Language HLLAPI High Level Language Application Programming Interface .HLP Help (file name extension) HLQ High Level Qualifier HLS Hue Lightness Saturation [as in colour graphics] HLS Hue, Luminance, Saturation (color model) HLT Halt HLV Heavy Lift Vehicle [Space] HMA High Memory Area [Microsoft] + Hub Management Architecture HMOS High Density Metal Oxide Semiconductor + High Speed Metal Oxide Semiconductor HMOS High performance Metal Oxide Semiconductor (see MOS) HMOS High performance MOS HMOS High preformance Metal Oxide Semiconductor (see MOS) HMS His/Her Majesty's Ship HMSO Her Majesty's Stationery Office [UK] HMT His/Her Majesty's Transport HNPA Home Numbering Plan Area [telephony] HNS Hospitality Network Service HOBIC HOtel Billing Information Center HOBIS HOtel Billing Information System HOL Higher Order Logic HOLD Call Hold (I.253 B) HOTOL HOrizontal Take-Off and Landing HP Hewlett Packard, Inc. [Corporate name] HP Hewlett-Packard (Company) HP High Pressure HP Higher Power (sort of an AA "in" term, usually God) HP Hit Points [role-playing games] HP HorsePower HPCC High Performance Computing and Communications HPDJ Hewlett-Packard Desk Jet HPFS High-Performance File System HPG Hewlett-Packard Graphics HPGe High Purity Germanium HPGL Hewlett-Packard Graphics Language HPIB Hewlett Packard Interface Bus [IEEE488] HPIB Hewlett-Packard Interface Bus HPLJ Hewlett-Packard Laser Jet HPL/T High-Productivity Languages/Tools HPO High Performance Option HPPA Hewlett-Packard Precision Architecture HPPI High Performance Parallel Interface HQ HeadQuarters HQW High Quality Writer module [on some SERCnet GEC computers] HR House of Representatives HRG High Resolution Graphics HRH Her Royal Highness HRH His Royal Highness HRIS Human Resource Information System HRMS Human Resource Management System HS High School HS High Speed HSB Hue, Saturation, Brightness HSC High Speed Channel HSCC High Level Serial Communication Controller SAB82520 HSCX extended HSCC SAB82525 HSM Hierarchical Storage Manager HSP High Speed Printer HSR Hardware Segment Register [GEC] HSSDS High-Speed Switched Digital Service HST Hawaiian Standard Time HST High Speed Technology [US Robotics] HST Hubble Space Telescope [NASA] .HST History (file name extension) .HST Host (file name extension) HSV Hue Saturation Value HT High Tension (as in electric power transmission) HT Horizontal Tabulator HTI Highway Transfer Interrupt HTK Hits To Kill HU High Usage HU High-Usage trunk HUAC House Unamerican Activities Committee HUD Heads Up Display HUD Housing and Urban Development [US Government] HUT Hopkins Ultraviolet Telescope HUTG High Usage Trunk Group H/V Horizontal/Vertical HVAC Heating, Ventilation, and Air Conditioning HVP Horizontal & Vertical Position HW PCM Highway H/W Hardware HW2000 Highway 2000 HWCP Hardware Code Page HWD Height-Width-Depth HWM High-Water Mark .HYP Hyphenation (file name extension) HZ HertZ HZ Hertz Hz HertZ (unit of frequency, cycles per second) HZ Hz, Hertz, cycles per second I Information (LAP-D Command) I- Information (numbered I-Frames) IAB Internet Activities Board IAB Internet Activities Board [Internet] IAEA International Atomic Energy Agency IAL International Algebraic Language (ALGOL was first called IAL) IAM Initial Address Message (SS7: in ISUP) IANA Internet Assigned Numbers Authority (IANA@ISI.EDU) IANA Internet Assigned Numbers Authority [Internet] IATA International Air Transport Association IB Instruction Buffer IBC Instrument Bus Computer IBC ISDN Burst Transceiver Circuit PEB2095 IBFN (Ger) integrated high bandwith long distance network IBM Ingrained Batch Mentality IBM International Business Machines [Corporate name] IBM International Business Machines (Corporation) IBM Itty Bitty Machines IBM-GL IBM Graphics Language IBN Integrated Business Network IBT Illinois Bell Telephone IC Imperial College, University of London IC Incoming Call (X.25) IC Independent Carrier IC Input Circuit + Integrated Circuit + Interrupt Controller IC Integrated Circuit IC Inter-exchange Carrier IC Interexchange Carrier [telephony] (see also IEC, IXC) IC Inter-LATA Carrier ICA Intra-application Communications Area ICAN Individual Circuit ANalysis ICAO International Civil Aviation Organization ICAS Intel Communicating Applications Specifications ICB Interstate Computer Bank ICBL Inter Chapter Branch and Link instruction [GEC] ICBM Intercontinental Ballistic Missile ICBR Inter Chapter BRanch instruction [GEC] ICC Interstate Commerce Commission ICC ISDN Communications Controller PEB2070 ICCC Imperial College Computing Centre ICCP Institute for the Certification of Computer Professionals ICD Interactive Call Distribution ICE In-Circuit Emulator ICE In-Circuit Emulator [Intel] ICF Interactive Computing Facility [SERC] ICFC Industrial & Commercial Finance Corporation ICFC Interactive Computing Facility Committee [SERC] ICI Imperial Chemical Industries ICJ International Court of Justice ICL Interface Clear ICL International Computers Ltd. ICLID Individual Calling Line ID ICM Integrated Call Management ICMP Internet Control Message Protocol ICMP Internet Control Message Protocol [Novell] .ICO Icon (file name extension) ICOM (Taiwan) Integrated Communication iCOMP Intel Comparative Microprocessor (index) [Intel] ICP Integrated Channel Processor ICP Integrated Channel Processor ICP Inventory Control Points ICR Intelligent Character Recognition ICRC International Cosmic Ray Conference ICS Intuitive Command Structure ICSC Inter-LATA Customer Service Center ICST Imperial College of Science & Technology ICT International Computers & Tabulators [now ICL] ID Idaho ID IDentification ID Identification + Identifier IDA (GB) Interated Digital Access (B64+B8+D8) IDA Integrated Digital Access IDA Intelligent Disk Array IDA Intelligent Drive Array IDA Intercommunication Data Areas IDA International Development Association IDAPI Integrated Database Application Programming Interface IDDD International Direct Distance Dial [telephony] IDE Imbedded Drive Electronics IDE Integrated Development Environment [Borlund] IDE Integrated Drive Electronics IDE Integrated Drive Electronics [computer disk drive] IDE Intelligent Drive Electronics IDE Interactive Design and Engineering IDE Interactive Development Environments, inc IDE Interface Design Enhancement IDEC ISDN D-channel Exchange Controller PEB2075 IDF Intermediate Distributing Frame [telephony] IDI Initial Domain Identifier (ISO 7498) IDIV Integer Divide IDMS Integrated Data Base Management System IDMS Integrated Database Management System IDN (Ger) integrated data network IDP Integrated Data Processing IDPC Integrated Data Protocol Controller SAB79C401 IDRIS a Unix related operating system [Whitesmiths] IDS Integrated Data Storage [Honeywell/GE] IDS Internal Directory System IDT Interrupt Descriptor Table IDV Interlibrational Derived Vehicle [Space] IDVC Integrated Data/Voice Channel .IDX Index (file name extension) IE Indo-European ie. Latin, "id est": "that is" IEC Information Engineering Committee [SERC] IEC Inter-Exchange Carrier [telephony] (see also IC, IXC) IEC International Electrotechnical Comission IEC ISDN Echo Cancellation Circuit IEC-P (old name of IEC-Q3) IEC-Q1 IEC for 2B1Q PEB2091 IEC-Q2 IEC-Q specially for LT and NT1 (without microprocessor) PEB2092 IEC-Q3 IEC-Q with parallel processor interface (for DAML) PEB2093 IEC-T IEC for 4B3T PEB2090 IEE Institute of Electrical Engineers (UK) IEE Institute of Electrical Engineers [UK] IEE Institution of Electrical Engineers IEEE Institute of Electrical & Electronics Engineers, Inc. [US] IEEE Institute of Electrical and Electronic Engineers IEEE Institute of Electrical and Electronics Engineers IEEE Institute of Electrical and Electronics Engineers IEEE488 Equipment interfacing standard [GPIB] IEEE696 Standard derived from S100 bus IEEE796 Standard derived from Multibus IEEE802 Local area network standard ['Ethernet'] IEEE896 Standard derived from VMEbus (? - still in discussion) IEF Information Engineering Facility IEPC ISDN Exchange Power Controller PEB2025 IETF Internet Engineering Task Force IETF Internet Engineering Task Force IEU Instruction Execution Unit = one million instructions [GEC] IF Intermediate Frequency (stage) I/F Interface IFB Invitation For Bids IFC International Finance Corporation IFC International Freighting Corporation IFD Image File Directory IFF Identification - Friend or Foe IFF IF and only iF IFF Interchange File Format IFG Incoming Fax Gateway IFIP International Federation for Information Processing IFLA International Federation of Library Associations IFRB International Frecuency Registration Board IFRPS Intercity Facility Relief Planning System IFS Installable File System [OS/2] IFS (Switzerland) integrated telecom service IGA Integrated Graphics Array IGC Integrated Graphics Controller IGES Initial Graphics Exchange Standard IGS Idenitfy Graphic Subrepertoire (Teletex) IGS Institute of Geological Sciences IGY International Geophysical Year IHP Indicated HorsePower IHS Integrated Hospital Support IIA Information Industry Association IIE Institute of Industrial Engineers IIF Immediate IF IIHF International Ice Hockey Federation IIL Integrated Injection Logic IIN Integrated Information Network IIR Immediate Impulse Response IIS Interactive Instruction System [IBM] IKBS Intelligent Knowledge Based Systems IKZ (Ger) pulse dial ILC ISDN Link Controller ILO International Labor Organization ILS Instrument Landing System ILV Industrial Launch Vehicle [Space] IM Input MUX IM Interface Module I&M Installation & Maintenance IMAS Integrated Mass Announcement System IMC Integral Multiplexer Channel [GEC] IMC IOS Mailbox Control IMDS Image Data Stream (format) [IBM] IMF International Monetary Fund IMG Image IMHO In My Humble Opinion [net jargon] IMM Input Message Manual IMMU IOS Memory Management Unit IMP Interface Message Processor IMP Interface Message Processor [ARPA] IMP Interface Message Processor (ARPAnet) IMP Interface Message Processor [ARPANET/MILNET] (replaced by PSN) IMP Interpersonal Messaging Protocol (X.420: P2) IMPA Intelligent Multi-Port Adapter [DCA] IMPL Initial MicroProgram Load[MVS] IMS Information Management System + Intermediate Maintenance Standards IMS Interactive Management System [IBM] IMSL International Mathematical Subroutine Library IMSL International Mathematics and Statistics Library IMT Inter-Machine Trunk IMTS Improved Mobile Telephone Service IMUL Integer Multiply IN Indiana IN Input IN Intelligent Network INADS INitialization and ADministration System [telephony] INC Increment INC InterNational Carrier INF Information (SS7: in ISUP) .INF Information (file name extension) INFO Database management system marketed by HENCO INC. .INI Initialize (file name extension) INISH INItialisastion deck INIT INITial operator [GEC] INIT Initialize INL Inter Node Link INM Integrated Network Management INN Inter Node Network INR Information Request (SS7: in ISUP) INRA Iesus Nazerenus Rex Iudaeorum (Jesus of Nazareth, King of the Jews) INRIA Institut National de Recherche en Informatique et Automatique INS Immigration and Naturalization Service INS Input String INS (Japan) Information Network System (B64+B16+D8) INSTITUTE - INSTITUTE's Name Shows That It's Totally Unrelated To EMACS INT Integer + Internal + Interrupt INT Interrupt (C/I channel code) INTA Interrupt Acknowledge INTAP INteroperability Technology Association for information Processing INTEL American company which manufactures solid-state electronics INTELSAT - INternational TELecommunications SATellite consortium INTO Interrupt if Overflow occurs INWATS INward Wide Area Telephone Service [telephony] INWG International Network Working Group IO Input/Output (sometimes I/O) IO Inward Operator I/O Input/Output I/O Input/Output IOB Input/Output Block [IBM] IOC Input/Output Controller IOC Integrated Optical Circuit IOC International Operating Center [telephony, US] IOCB Input/Output Control Block [GEC] IOCC International Overseas Completion Center IOCS Input/Output Control System IOCTL Input/Output Control IOD Identified Outward Dialing IOM ISDN-Oriented Modular (Architecture and Interfaces) IOM2 extended IOM IOOF International Order of Odd Fellows IOP Input-Output Processor IOP Input/Output Processor IOPL Input/Output Priviledge Level IOS Institute of Oceanographic Sciences [NERC] IOS ISDN Operational Software SIPB6013 IOSGA Input/Output Support Gate Array IOT Inter-Office Trunk IOU I owe you IOW In other words IOW Isle of Wight, UK IP Information Provider [telephony] IP Innings Pitched IP Instruction Pointer + Internet Protocol IP Intermediate Point IP Internet Protocol (TCP/IP, DOD) IPABX ISDN PABX IPAC ISDN PC Adapter Circuit PEB21?? IPAT ISDN Primary Access Transceiver PEB2235 IPB SIPB IPBC IOM2 PBC (old name for EPIC) IPC Instructions Per Clock + Interprocess Communication IPC Inter-Process Communication IPC Interprocess Communication IPC InterProcessor Communication IPCS Interactive Problem Control System IPCS IOS Process Control System IPE Integrated Programming Environment IPF Information Presentation Facility IPL Information Processing Language [as in IPL-II, IPL-III, IPL-V] IPL Information Programming Language IPL Initial Program Load + Initial Program Loader IPL Initial Program Load [GEC, IBM] IPLAN Integrated PLanning And Analysis IPM Impulses Per Minute IPM Inter-Process Message [GEC] IPM Interruptions Per Minute IPMS InterPersonal Message Services IPP IOS Protocol Part IPS Information Processing Standards IPS Installation Performance Specification IPSE Integrated Project Support Environment IPSE Integrated Project-Support Environment IPSS International Packet Switch Stream Service IPU Internal Processing Unit IPX Integrated Packet eXchange IPX Internetwork Packet Exchange [Novell] IQ Intelligence Quotient (see EQ) IQL Interactive Query Language IR Index Register IR Infra-Red IRA Individual Retirement Account IRA Irish Republican Army IRAS Infrared Astronomical Satellite IRBM Intermediate Range Ballistic Missile IRC International Record Carrier IRC Internet Relay Chat [Internet] IRDS Information Resource Dictionary Standard IRDS InfraRed Detection Set IRE Institute of Radio Engineers (old name for the now IEEE, which see) IRET Interrupt Return IRL Interactive Reader Language + Inter-Repeater Link IRLED Infrared Light Emitting Diode IRM Information Resource Management IRM Information Resources Management IRMS Information Resources Management Service IROR Internal Rate Of Return IRPC ISDN Remote Power Control PSB2120 IRQ Interrupt Request IRS Internal Revenue Service IRTF Internet Research Task Force IRX Information Retrieval Experiment IS Information System + Interrupt Status IS Information Systems IS International Standard (Beyond the DIS Stage) IS Interrupt Set ISA Industry Standard Architecture ISA Industry-Standard Architecture ISAC-P ISDN Subscriber Access Controller (S Bus, PABX, U) PEB20950 ISAC-S ISDN Subscriber Access Controller (S Interface ICC+SBC) PEB2085 ISAM Indexed Sequential Access Method [IBM] ISAM Indexed Sequential-Access Management/Method ISBD International Bibliographic Description ISC Information Services Center ISC Input Spooling Control [GEC] ISC Instruction Set Computer ISC International Switching Center ISCH Interstitial-Cell-Stimulating Hormone (same as LH) ISD Image Section Descriptor + Instructional Systems Design ISDN Integrated Services Digital Network ISDN Integrated Services Digital Network [telephony] ISDT Integrated Systems Development Tool ISEE International Sun Earth Explorer (usually ISEE-3) ISF Information Systems Factory ISFUG Integrated Software Federal User Group ISI Information Sciences Institute ISI Internally Specified Index ISIS Integrated Systems and Information Services ISL Interactive System Language ISLM Integrated Services Line Module ISLU Integrated Services Line Unit ISM ISDN Switching Module ISN Information Systems Network ISN Integrated Systems Network ISO International Standards Organisation ISODE ISO Development Environment ISOO Information Security Oversight Office ISO/OSI International Standards Organization/Open Systems Interconnection (model) ISP Instruction Set Processor ISP Intermediate Service Part ISP Internet Service Provider [Internet] + Interrupt Status Port ISPBX Integrated Systems PBX ISPC International Signaling Point Code (SS7) ISPF Interactive Structered Programming Facility ISPF Interactive System Programming Facility ISPL Input SPooLer [GEC] ISPM International Solar Polar Mission ISR Information Storage and Retrieval + Interrupt Service Routines ISR Institute of Snow Research ISRG Independent Space Research Group ISS Integrated Switching System ISSN Integrated Special Services Network ISSS ISDN Supporting System ISTA Interrupt Status Register ISUP Integrated Services User Part ISUP ISDN User Part (SS7: Q.76X) ISV Independent Software Vendor ISV Independent Software Vendor IT Inactivity Test (SS7: in SCCP) IT Industrial Technology IT Information Technology ITAC ISDN Terminal Adaptor Circuit PEB2110 ITB Information Technology Branch + Intermediate Text Block ITC International Typeface Corporation ITC Inter-Task Communication ITEC ITeC, Information Technology Centre [part of the YTS] ITP Interactive Terminal Protocol ITS Incompatible Timesharing System ITS Institute of Telecommunication Science ITSO Incoming Trunk Service Observation ITSTC Information Technology Steering Committee ITT International Telegraph & Telephones ITT International Telephone and Telegraph ITU International Telecommunication Union ITU International Telecommunication Union ITU International Telecommunications Union ITUG International Telecommunications User Group ITUSA IT Users Standards Association ITV Interactive Television ITX Intermediate Text Block IUCC Inter-Universities Committee on Computing [advises IUSC] IUS Inertial Upper Stage [Space] IUSC Inter-Universities Software Committee [advises Computer Board] IUV Interlibrational Utility Vehicle [Space] IVD Integrated Voice Data IVIS Interactive Video Information System IVP Installation Verification Program IVR Interactive Voice Response IVS Interactive Videodisk System IVT Interrupt Vector Table IVTS International Video Teleconferencing Service IV&V Independent Verification & Validation IWF Interworking Facility (Gateway) IWU Interworking Unit (Gateway) IX Interactive eXecutive IXC Inter-eXchange Carrier [telephony] (see also IC, IEC) IXM IntereXchange Mileage JA Jump Address + Jump if Above JACM Journal of the Association for Computing Machinery JAD Joint Application Design JAE Jump if Above or Equal JANET Joint Academic NETwork (SERCNET forms a part of this) JBE Jump if Below or Equal JBS John Birch Society JC Jesus Christ JC Joint Compound (plumbing) JC Julius Caesar JC Jump if Carry set JC Junior College JCA Jewelry Crafts Association JCAC Joint Civil Affairs Committee JCAE Joint Committee on Atomic Energy JCEE Joint Council on Economic Education JCET Joint Council on Educational Television JCL Job Control Language JCL Job Control Language JCS Joint Chiefs of Staff JD Justice Department JDC Japan Digital Cellular JDS John Dewey Society JE Jump if Equal JEDEC Joint Electronic Device Engineering Council JEDEC Joint Electronic Devices Engineering Council JEIDA Japanese Electronics Industry Development Association JES Job Entry System JES Job Entry System [IBM] JES John Ericsson Society JES2 Job Entry System for the IBMs under MVS JES3 Job Entry System for the IBMs under MVS JET Joint European Torus JFCB Job File Control Block [IBM] JFET Junction Field-Effect Transistor JFK John F. Kennedy (US president, international airport) JFMIP Joint Financial Management Improvement Program JG Jump if Greater JGE Jump if Greater or Equal JGR Journal of Geophysical Research JI Justice, Inc. JIC Joint Intelligence Center JIC Just in Case JIM Job Information Memorandum JINTACCS - Joint INteroperability of TActical Command and Control Systems JIS Japan Industrial Standards JISC Japanese Industrial Standards Committee JIT Just In Time JL Jump if Less JLE Jump if Less than or Equal to JMP Jump JMS John Milton Society JMX Jumbogroup MultipleX JNA Jump if Not Above JNAE Jump if Not Above or Equal JNB Jump if Not Below JNBE Jump if Not Below or Equal JNG Jump if Not Greater JNGE Jump if Not Greater or Equal .JNK Junk (file name extension) JNLE Jump if Not Less or Equal JNO Jump if No Overflow JNP Jump if No Parity JNS Jump if No Sign JNT Joint Network Team [RAL]TOP JNZ Jump if Not Zero JO Job Order JO Junior Officer JOVE Jonathan's Own Version of Emacs JOVIAL Jules Own Version of the International Algorithmic Language JPE Jump if Parity Even JPEG Joint Photographic Experts Group JPL Jet Propulsion Laboratory JPL Jet Propulsion Laboratory JPO Jump if Parity Odd JRC Junior Red Cross JRNL JouRNaL [GEC] JS Jump if Sign JSAM JES3 Spool Access Method JSC Johnson Space Center JSD Jackson System Development JSN Junction Switch Number JSRC Joint Services Review Committee JSW Junctor SWitch JTIDS Joint Tactical Information Distribution Systems JTMP Job Transfer Manipulation Protocol JV Junior Varsity JvNC John von Neumann (Super Computer) Center JvNCnet John von Neumann (Super Computer) Center network JZ Jump if Zero K Kilobit K9 canine (K9 corps - army dogs) KB Keyboard + Kilobyte (1,024 bytes) KB Kilo Bytes (or Bits), 1024 KB KiloByte KBD Keyboard (also KEYB) KBD$ Keyboard [OS/2] KBPS KiloBits Per Second KBPS Kilo-Bytes Per Second KC King's Counsel (QC when queen reigning) KC Knights of Columbus KD Kiln Dried KD Knocked Down KDCI Key Display Call Indicator KDT Key Definition Table KDT Keyboard Display Terminal KERMIT Kl-10 Error-free Reciprocal Micro Interconnect over Tty lines KEYBBE Foreign language KEYBoard program - Belgium KEYBBR Foreign language KEYBoard program - Brazil KEYBCF Foreign language KEYBoard program - Canadian-French KEYBCZ Foreign language KEYBoard program - Czechoslovakia (Czech) KEYBDF Foreign language KEYBoard program - Denmark KEYBFR Foreign language KEYBoard program - France KEYBGR Foreign language KEYBoard program - Germany KEYBHU Foreign language KEYBoard program - Hungary KEYBIT Foreign language KEYBoard program - Italy KEYBLA Foreign language KEYBoard program - Latin America KEYBNL Foreign language KEYBoard program - Netherlands KEYBNO Foreign language KEYBoard program - Norway KEYBPL Foreign language KEYBoard program - Poland KEYBPO Foreign language KEYBoard program - Portugal KEYBSF Foreign language KEYBoard program - Swiss-French KEYBSG Foreign language KEYBoard program - Swiss-German KEYBSL Foreign language KEYBoard program - Czechoslovakia (Slovak) KEYBSP Foreign language KEYBoard program - Spain KEYBSU Foreign language KEYBoard program - Finland KEYBSV Foreign language KEYBoard program - Sweden KEYBUK Foreign language KEYBoard program - United Kingdom KEYBUS Foreign language KEYBoard program - United States KEYBYU Foreign language KEYBoard program - Yugoslavia KFT KiloFeeT KHz Kilo HertZ (unit of frequency, 1000 cycles per second) KHZ KiloHertZ KI Kiwanis International KIA Killed In Action KIAS Knot Indicated Air Speed KINGS Keyworth Interactive G-EXEC Subsets [NERC] KO Knock Out KP Key Pulse [telephony] KP Kitchen Police KPNO Kitt Peak National Observatory KPO KeyPunch Operator KQC King's College London K&R Kernighan and Ritchie, the c programming language KRS Knowledge Retrieval System KS King's Scholar KSC Kennedy Space Center KSR Keyboard Send & Receive KSR Keyboard Send Receive KSR Keyboard Send-Receive KSU Key Service Unit KSU Key System Unit [telephony] KTA Korea Telecommunication Authority (ROK) KTS Key Telephone Set KTS Key Telephone System [telephony] KTU Key Telephone Unit [telephony] KVST (Ger) node exchange KW Kilo Watt KWIC Key Word In Context KWIC Key-Word In Context KWOC Key-Word Out of Context KY Kentucky KZU (Ger) signaling converter L1 Lagrange Point #1 35,000 Miles above moon [Space] L2 Lagrange Point #2 40,000 Miles behind moon [Space] L3 Lagrange Point #3 (?? 35,000 Miles below moon) [Space] L3-ERC Layer 3 Error Control (IOS) L3M Layer 3 Manager (IOS) L4 Lagrange Point #4 240,000 mile Earth orbit [Space] L5 Lagrange Point #5 240,000 mile Earth orbit [Space] LA Los Angeles LA Louisiana LA Low Altitude LAC Loop Assignment Center LADAR LAser Detection And Ranging LADDR Layered Device Driver Architecture [Microsoft] LADT Local Access Data Transport LAIS Local Automatic Intercept System LALL Longest Allowed Lobe Length LAM Master of Liberal Arts LAMA Local Automatic Message Accounting [telephony] LAMSAC Local Authorities Management Services & Computing Committee LAN Local Apparent Noon LAN Local Area Network LAN Local Area Network LANL Los Alamos (NM) National Laboratory LANSC Local Area Network Sub-Committee [SERC] LAP Link Access Protocol LAPB Link Access Procedure Balanced (protocol) LAPB Link Access Protocol (Balanced) LAPD Link Access Procedure Direct (protocol) LAPD Link Access Procedure on the D channel LAPM (LAP-M) Link Access Protocol for Modems LAPM Link Access Procedure for Modems LAPX LAPB extended (T.71, for half duplex teleservice) LAR Load Access Rights LAR Local Acquisition Radar LASER Light Amplification by Stimulated Emission of Radiation Laser Light Amplification by Stimulated Emission of Radiation LASS Local Area Signaling Service LASTport Local Area Storage Transport (protocol) [DEC] LAT Local Apparent Time LAT Local Area Transport [DEC] LATA Local Access and Transport Area [telephony] LATIS Loop Activity Tracking Information System LAWN Local Area Wireless Network LAX Los Angeles International Airport LB Left Button (of 2 or 3 button Mouse) LB Light Bomber LB pound (LiBra) LBBD Loopback B1, B2 and D channel request LBHS Long Beach High School LBL Label LBL Lawrence Berkeley Labs (California) LBn Loopback channel Bn request LBO Line Buildout LBR Librarian .LBR Library (file name extension) LBS Load Balance System LBS Pounds LBT Listen Before Talk LC inductor-Capacitor circuit (as in filters, L is symbol inductance) LC Line Card LCAMOS Loop CAble Maintenance Operation System LCC Leadless Chip Carrier LCCIS Local Common Channel Interoffice Signaling LCCL Line Card CabLe LCCLN Line Card Cable Narrative LCD Liquid Crystal Display LCD Liquid Crystal Display LCD Lowest Common Denominator LCDN Last Called Directory Number LCDR Lieutenant Commander LCG Logical Channel Group LCIE Lightguide Cable Interconnection Equipment LCL Lunar Cargo Lander [NASA OEXP] LCLOC Line Card LOCation LCM Large Core Memory LCM Least Common Multiple LCM Life Cycle Management LCN Logical Channel Number LCP Link Control Protocol (protocol) LCR Least Cost Routing LCRMKR Line Card ReMarKs, Retained LCS Laboratory for Computer Science [MIT] LCS7 Link Controller for Signaling System Number 7, PEB3040 LCSE Line Card Service and Equipment LCSEN Line Card Service and Equipment Narrative LCT Landing Craft Tanks LCU Last Cluster Used LD Long Distance [telephony] LDA Logical Device Address LDC Long Distance Carrier [telephony] LDC Lotus Development Corporation LDC Universe Project 4065 systems - Local Data Controller? LDEF Long Duration Exposure Facility [NASA] LDF Large Deployable Reflector [Space] LDL Low Density Lipoprotein LDMTS Long Distance Message Telecommunications Service LDT Local Descriptor Table LDX Long Distance eXtender [telephony] LE Less or Equal LE Local Exchange (contains D-CTL) LEA Load Effective Address LEA Local Education Authority LEAP Low-power Enhanced At Portable LEAS LATA Equal Access System LEC Local Exchange Carrier [telephony] LED Light Emitting Diode LED London EDitor [ULCC, QMCCC, etc.] LEM Language Extension Module LEM Lunar Excursion Module LEN Low Entry Networking LENCL Line Equipment Number CLass LEO Low Earth Orbit [Space] LEO Lyon's Electronic Office LEP Large Electron-Positron collider [CERN] .LET Letter (file name extension) LEX Lexicon LF Line Feed LF Line Feed LF Line Finder LF Low Frequency (30-300KHz) LFACS Loop Facilties Assignment And Control System LFI Last File Indicator LFU Least Frequently Used LGDT Load Global Descriptor Table LH Left Hand LH Line Hunting (I.252 F) LH Lower Half LH Luteinizing Hormone (same as ISCH) LHC Large Hadron Collider [CERN] LHD Litterarum Humaniorum Doctor (doctor of human letters) LHS Left Hand Side LI Length Indicator (SS7) LI Long Island .LIB Library (file name extension) LIBNAME fileNAME where filetype is mac- txt- etc. LICS Lotus International Character Set [LDC] LIDT Load Interrupt Descriptor Table LIEP Large Internet Exchange Packet [Novell] LIFIA Laboratoire d'Informatique Fondamentale et d'Intelligence Artificielle LIFO Last In, First Out LIFO Last In, First Out LIFO Last In First Out (see FIFO) LIFO Last-In First-Out ['stack'] LILO Last In, Last Out LIM Lotus/Intel/Microsoft LIMA Lotus/Intel/Microsoft/AST LIMS Library Information Management System LINC Laboratory INstrument Computer LIPS Logical Interferences Per Second LIS Logical Indexed Sequential file [GEC] LISP LISt Processing (language) LISP LISt Processing Language LISP List Processing (Language)(See HLL) LIU Line Interface Unit LL Late Latin LL Logical Link LL Long Lines [telephony] LLAMA Logic Lacking A Meaningful Acronym LLB Legum Baccalaureus (bachelor of laws) LLC Logical Link Control LLC Low Level Controller SIPx6100 LLD Legum doctor (doctor of laws) LLD Low Level Device Drivers (IOS) LLDT Load Local Descriptor Table LLID LL Identifier LLL Last Look Logic LLL Lawrence Livermore Laboratory LLN Line Link Network [telephony] LLNL Lawrence Livermore National Laboratories LLO Low Lunar Orbit [Space] LLOX Lunar Liquid Oxygen [Space] LLP Line Link Pulsing [telephony] LLP Link Layer Protocol (LAPD) LM Life Master (Contract Bridge ranking) LM Lunar Module LMAN Local MANager, or site manager [of SERCnet computer] LMBCS Lotus Multibyte Character Set [Lotus] LMC Large Magellanic Cloud (see SMC) LMEN Local Managers [of SERCnet computers] LMH Large Moving Head (disc) LMI Local Management Interface LMMS Local Message Metering System LMOS Line Maintenance Operations System [telephony, AT&T] LMOS Loop Maintenace Operations System LMSW Load Machine Status Word LM/X LAN Manager for Unix LN Logarithm (Natural) LNA Low Noise Amplifier LNDI Lotus Notes:Document Imaging LNG Liquefied Natural Gas LNG Liquified Natural Gas LOA Lands of Adventure LOC Local Operating Company LOC Loop On-Line Control LOCAP LOw CAPacitance LODSB Load String Byte LOF Lock OFf-line LOF Loss of Frame LOFT Launch Operations Flight Test [Space] LOG Logarithm (Base 10) LOGO (Programming Language)(See HLL) LON Lock ON-line LOOPE Loop while Equal LOOPNE Loop while Not Equal LOOPNZ Loop while Not Zero LOOPS Lisp Object Oriented Programming System LOOPZ Loop while Zero LOP Lines Of Position LORE Line Oriented Editor LOSF Lunar Orbit Staging Facility [Space] LOTS Low Overhead Timesharing System LOX Liquid Oxygen LP Long Playing record LP Low Pressure LPA Link Pack Area [MVS] LPC Linear Predictive Coding (speech processing) LPCDF Low Profile Combined Distributing Frame LPD Line Printer Daemon (protocol) [Berkley] LPDA Link Problem Determination Aid LPF League for Programming Freedom LPG Liquefied Petroleum Gas LPG Liquified Petroleum Gas LPG Low Pressure Gas LPI Lines Per Inch LPI Lines Per Inch LPL Lotus Programming Language [Lotus 1-2-3] [LDC] LPL Lunar Personnel Lander [NASA OEXP] LPM Lines Per Minute LPM Lines Per Minute LPN Licensed Practical Nurse LPN Logical Page Number LPP Licensed Program Products LPR Line PrinteR LPS Low-Power Schottky LPT Line Printer LPT Lunar Propellant Tanker [NASA OEXP] LPT1 First Parallel Printer Port LPT2 Second Parallel Printer Port LPT3 Third Parallel Printer Port LPV Lunar Piloted Vehicle [NASA OEXP] LQ Letter Quality LQM Link Quality Monitoring (protocol) LRAP Long Route Analysis Program LRB Liquid Rocket Booster [Space] LRB Logical Random Binary file [GEC] LRBM Long Range Ballistic Missile LRC Local Register Cache + Longitudinal Redundancy Check LRC Longitudal Redundancy Check LRC Longitudinal Redudancy Character LRC Longitudinal Redundancy Character LRC Longitudinal Redundancy Check LRI Least Recently Loaded LRN Local Reference Number LRS Line Repeater Station .LRS Language Resource (file name extension) [WordPerfect] LRSS Long Range Switching Studies LRT Logical Random Text file [GEC] LRU Least Recently Used LRU Least Recently Used LRU Line Replaceable Unit LS Least Significant LS Left Side LS Letter Signed LS Locus Sigilli (place of seal) LSA Line Sharing Adapter LSB Least Signficant Bit; Least Significant Byte LSB Least Significant Bit LSB Least Significant Bit; Least Significant Byte LSB Least Significant Bit, or Byte LSB Logical Sequential Binary file [GEC] LSB Lower Side Band LSC Least Significant Character LSC Lecture Series Committee [MIT] LSC LightSpeed C LSD Least Signficant Digit LSD Least Significant Digit LSD Least Significant Digit LSD LySergic acid Diethylamide LSD pounds (Libra), shillings (Sestertii), and (old) pence (Denarii) LSEC Loss of SEC (C/I channel code) LSI Large Scale Integration LSI Large Scale Integration LSI Large-Scale Integrated circuitry LSI11 LSI-11, a DEC Q-bus minicomputer system LSL Load Segment Limit LSL Loss of Signal Level (C/I channel code) LSP LightSpeed Pascal LSQA Local System Queue Area [MVS] LSRP Local Switching Replacement Planning system LSS Life Support System LSS Loop Switching System LSSD Level-Sensitive Scan Detection LSSU Link State Signal Unit (SS7) LST List LST Logical Sequential Text file [GEC] .LST List (file name extension) LSU Loss of Signal level of U interface (C/I channel code) LSUE LSU Error condition (C/I channel code) LSV Line Status Verifier LT Line Termination LT Local Terminal process [GEC] LT Long Ton LT Low Tension LTAB Line Test Access Bus LTC Lieutenant Colonel LTC Local Test Cabinet LTD Local Test Desk LTD LT Disable (C/I channel code) LTF Lightwave Terminating Frame LTF Line Trunk Frame LTG Line Trunk Group LTJG Lieutenant Junior Grade LTL Less than Truckload Lot LTR Letter + Load Task Register LTS Loss Test Set LT-S LT on S bus LT-T LT on T interface LTU Line Trunk Unit LTUC LTU Control LU 6.2 protocol for APPC LU Logical Unit (Also LUN) LUG Local Users Group LUT Look-Up Table LUT Lookup Table LWL (Ger) OFT LWM Low-Water Mark LXE Lightguide eXpress Entry LZ Landing Zone LZ Lazy Write LZW Lempel-Ziv-Walsh (algorithm) M Miniatures M860Name of a tape cartridge store similar to IBM's MSS MA Maintenance Administrator MA Massachusetts [US state postal designation] MA Multiple Access (Primary) MAAP Maintenance And Administration Panel MAAP Maintenance And Admistration Panel MAC Media/Medium Access Control MAC Medium Access Control MAC Military Air Command MAC MIT interdepartmental lab (stands for many things) (renamed to LCS) MAC Multi-Access Computing [ICL] .MAC MacPaint (file name extension) + Macro (file name extension) MACBS Multi-Access Cable Billing System MACSYMA project MAC's SYmbolic MAnipulation System MAD Mutual Assured Destruction MADD Mothers Against Drunk Driving MADN Multiple Access Directory Numbers MAFS Module to Access the Filing System [RAL GEC] MAG Magazine .MAI Mail (file name extension) MAN Manual MAN Metropolitan Area Network MAP Memory Allocation Map MAP Maintenance Analysis Procedures MAP Maintenance and Administration Position MAP Manufacturing Automation Protocol MAP Manufacturing Automation Protocol MAP Microelectronics Application Project [DoI] MAP Mobile Application Part .MAP Linker Map (file name extension) MAPE Microcomputers & Primary Education MAPI Mail/Messaging Applications Programming + Interface [Microsoft] MAPICS Manufacturing, Accounting and Production + Information Control System [IBM] MAPSS Maintenance & Analysis Plan for Special Services MAP/TOP Manufacturing Automation Protocol/Technical Office Protocol MAR Microprogram Address Register MARBI MAchine Readable form of Bibliographic Information MARC MAchine Readable card Catalog MARC Market Analysis of Revenue and Customers system MARI Microelectronics Applications Research Institute MARKIV Mark IV, a medium response enquiry processing program MARS Multiuser Archival and Retrieval System MAS MAin Store MAS Manufacturing Advisory Service MAS Mass Announcement System MASB MAS Bus MASC MAS Controller MASC Multiple Award Schedule Contract MASER Microwave Amplification by Stimulated Emission of Radiation Maser Microwave Amplification by Stimulated Emission of Radiation MASH Mobile Army Surgical Hospital MASM Macro Assembler [Microsoft] MASM MAS Memory MASS Maximum Availability and Support + Subsystem [Parallan] MASSBUS equipment interface bus used on some DEC VAX computers MAST MessAge Switching system for Terminal communication MAST Multi-Application SOnar Trainer MAT-CALS - Marine Air Traffic-Control And Landing System MAT-CALS Marine Air Traffic-Control And Landing System MATFAP Metropolitan Area Transmission Facility Analysys Program MAU Math Acceleration Unit MAU Media Access Unit + Multistation Access Unit MAVDM Multiple Application VDM MAX Maximum MAXIMOP multi-access system under GEORGE 2 [QMCCC/ICL] MB Mega Bytes (or Bits), 1024 x 1024 MB MegaByte MB Megabyte (1,000 kilobytes) + Middle Button (of 3 button Mouse) MBA Master Business Administration MBA Master Business Adminstration MBASIC Microsoft BASIC [Microsoft] MBO Management By Objectives MBPS MegaBits Per Second MBPS Megabytes Per Second MBX Mailbox MC Master of Ceremonies MCA Micro Channel Architecture MCA Micro Channel Architecture [IBM] MCAE Mechanical Computer Aided Engineering MCB Memory Control Block MCC Master Control Center MCC Master Control Console MCC Microelectronics and Computer technology Corporation MCCS Mechanized Calling Card Service MCCU Multichannel Communication Control Unit [GEC] MCGA Multicolor Graphics Array MCH Maintenance CHannel MCHB Maintenance CHannel Buffer MCI Malicious Call Identification (I.251 G) MCI Media Control Interface [Microsoft] MCI Microwave Communications Incorporated MCIAS Multi-Channel Intelligent Announcement System MCIAS Multi-Channel Intercept Announcement System MCL Microsoft Compatibility Labs [Microsoft] MCN Metropolitan Campus Network MCP Master Control Program MCP/AS Master Control Program/Advanced System MCPO Master Chief Petty Officer MCQ Multiple Choice Questions MCR Monitor Console Routine [DEC RSX11] MCS Meeting Communications Service MCS Muliple Console Support MCSV Mars Crew Sortie Vehicle [NASA OEXP] MCTRAP Mechanized Customer Trouble Report Analysis Plan MCU Master Control Unit [ICL] MCU Memory Control Unit [ICL] MCU Monitor Control Unit [GEC] MCU Multi-Chip Unit [DEC] MD Doctor of Medicine MD Make Directory + Monochrome Display MD Maryland [US state postal designation] MD Medical Doctor MD Months after Date MDA Monochrome Display Adapter MDACS Modular Digital Access Control System MDAS Magnetic Drum Auxiliary Sender MDC Marker Distributor Control MDC Meridian Digital Centrex MDC Metropolitan District Commision [Mass State Agency] MDE Modular Design Environment MDF Main Distribution Frame [telephony] .MDF Menu Definition File (file name extension) MDI Multiple Document Interface MDIC Manchester Decoder and Interface Chip [AT&T] MDK Multimedia Developers Kit [Microsoft] MDR Minimum Design Requirement MDRE Mass Driver Reaction Engine [Space] MDS Main Device Scheduler MDT Mean Down Time MDU Marker Decoder Unit MDX Modular Digital eXchange MDY Month Day Year ME Maine ME Mechanical Engineer .ME Opening Information (file name extension) (As in READ.ME) MEB Memory Expansion Board MEC Mobile Equipment Console MEd Master of EDucation MEG Megabyte MEGAFLOP - Million FLoating point OPerations per sec [machine performance] MELD Mechanized Engineering and Layout for Distributing frames .MEN Menu (file name extension) MEP Microelectronics in Education Programme MERP Middle-Earth Role Playing MERS Most Economic Route Selection MERT interprocess MEssage sending & Real Time version of Unix MESI Modified Exclusive Shared and Invalid (protocol) MET Multibutton Electronic Telephone METRONET - University of London computer network MeV Million Electron Volts MF Mainboard Firmware (IOS) MF Medium Frequency (300-3000KHz) MF Middle French MF Multi Frame MF Multi-Frequency [telephony] MFA Master Fine Arts MFC Multiple Frame operation Control (IOS) MFD Master File Directory [Pr1me] MFENET Magnetic Fusion Energy NETwork MFFS Microsoft Flash File System [Microsoft] MFJ Modification of Final Judgement MFJ Modified Final Judgment [telephony] MFLOPS Million Floating Point Operations Per Second MFLOPS Million FLoating-point OPerations per Second (see also FLOPS) MFM Modified Frequency Modulation MFM Modified Frequency Modulation [magtape, floppy disc] MFP Multifunction Peripheral MFR Multi-Frequency Receivers MFS Macintosh File System MFS Magnetic Tape Field Search MFT Metallic Facility Terminal MFT Multiprogramming with a Fixed number of Tasks MFT Multiprogramming with a Fixed number of Tasks MG Machine Gun MG Major General MG MasterGroup MG Military Government MGA Monochrome Graphics Adapter MGH Massachusetts General Hospital MGM Metro-Goldwyn Mayer [Corporate name] MGR Manager MGT MasterGroup Translator MH Modified Huffman code (FAX) MHD MagnetoHydroDynamics MHS Mail Handling System [ISO] MHS Message Handling Service MHS Message Handling Service + Message Handling System MHS Message Handling System MHz Mega HertZ (unit of frequency, 1,000,000 cycles per second) MHZ MegaHertZ MHZ Megahertz MI Michigan MI Military Intelligence MIA Missing In Action MIB Management Information Base MICE Modular Integrated Communications Environment MICROSIM - MICROprocessor SIMulator [INTEL 8080/8085, Z80, M6800 etc] MICS Macro Interpretive Commands MIDI Musical Instrument Digital Interface MIDI Musical Instrument Digital Interface MIFASS Marine Integrated Fire And Support System MII Microsoft/IBM/Intel MIL Machine Interface Layer [Go Corporation] MILNET MILitary NETwork MIM Metal-Insulator-Metal (screen) MIM Morality In Media MIMD Multiple Instruction, Multiple Data MIMD Multiple Instruction Multiple Data Stream (processor) MIMD Multiple Instructions Multiple Data MIME Multipurpose Internet Mail Extension [Internet] MIN Minimum MIN Mobile Identification Number MINCE MINCE Is Not Complete Emacs MINIMOP multi-access operating system for ICL 1900 range MINITAB general-purpose statistical system MINX Multimedia Information Network eXchange MIP Microprocessor Interface Port MIPS Million Instructions Per Second MIPS Million Instructions per Second MIR Micro-Instruction Register Mir Peace [Russian] MIRV Multiple Independently-Targetable Reentry Vehicle MIS Management Information System MIS Management Information System MIS Microcomputer Information Services MISC Miscellaneous MISCF MISCellaneous Frame MISP Microelectronics Industry Support Programme [DoI] MIT Machine Interface Terminal MIT Massachusetts Institute of Technology MITI Ministry of Trade & Industry [Japan] MITS Microcomputer Interactive Test System MIX Member Information Exchange MKDIR Make Directory ML Machine Language ML Macro Language ML Middle Latin MLA Member of Legislative Assembly (see MPP) MLC MiniLine Card MLCD Multi-Line Call Detail MLD Minimum Lethal Dose MLL Mars Logistics Lander [NASA OEXP] MLPA Modified Link Pack Area[MVS] MLS Microwave Landing System MLS Multi-Level Security MLT Mechanized Loop Testing MLV Medium Lift Vehicle [NASA OEXP] MM Maryknoll Missioners MM Minutes + Month MMA Microcomputer Managers Association MMC Matched Memory Cycle + Microcomputer Marketing Council MMC Minicomputer Maintenance Center MMES Martin Marietta Energy Systems MMFS Manufacturing Message Format Standard MMGT MultiMasterGroup Translator MMI Man-Machine Interface MMIS Materials Manager Information System MML Man Machine Language MMM see 3M MMOC Minicomputer Maintenance Operations Center MMS Main Memory Status MMS Memory Management System MMS43 Modified Monitoring State 43 Code (4B3T) MMU Manned Maneuvering Unit [Space] MMU Memory Management Unit MMU Memory Management Unit MMW Multi-Mega Watt [Space] MMX Mastergroup MultipleX MN Minnesota MNA Member of National Assembly (Quebec) MNOS Metal Nitride Oxide Semiconductor MNP Microcom Networking Protocol MNP Microcom Networking Protocol [product] .MNU Menu (fine name extension) MO Magneto-Optical (disk drive) MO Mail Order MO Medical Officer MO Missouri MO Modus Operandi MO Money Order MOC Ministery of Communication MOD Ministery of Defense MOD Ministry of Defence MOD Modem + Modulus MODEM Modulator Demodulator MODEM MOdulator-DEModulator MODEM MOdulator/DEModulator MOG Minicomputer Operations Group MOHLL Machine Oriented High Level Language MOMV Manned Orbital Maneuvering Vehicle [Space] MON Monitor Channel (IOM2) MOP Multiple Online Programming [ICL] MOR Middle-Of-the-Road MOS Metal Oxide Semiconductor MOS Metal Oxide Semiconductor MOSFET Metal Oxide Semiconductor Field Effect Transistor MOSFET Metal Oxide Semiconductor Field Effect Transistor MOSFET Metal Oxide Semiconductor Field-Effect Transistor MOTIS Message-Oriented Text Interchange System MOTV Manned Orbital Transfer Vehicle [Space] MOU Memorandum Of Understanding MOUSE Minimum Orbital Unmanned Satellite of Earth MOV Metal Oxide Varistor + Move MOV Move MOVS Move String MOVS Move String MP Melting Point MP Member of Parliament MP Metropolitan Police MP Microprocessor MP Military Police(man) MP Multiple Processors MP Multi-Processor MP MultiProcessor MPC MP Command MPC Multimedia Personal Computer MPCH Main Parallel CHannel MPCS Mission Planning and Control Station (Software) MPDU Message Protocpl Data Units (X.411) MPE Mission to Planet Earth [Space] MPEG Moving Picture Experts Group MPG Miles Per Gallon MPH Mile Per Hour MPH Miles Per Hour MPL Multiprogramming Level MP/M Multi-user CP/M [Digital Research] MPOW Multiple Purpose Operator Workstation MPP Massively Parallel Processing MPP Member of Provincial Parliament (Canada; also MLA) MPP Message Processing Program MPP Microcom Network Protocol [Microcom] MPPD Multi-Purpose Peripheral Device MPR Mars Pressurized Rover [Space] MPR Multipart Repeater MPU Micro-Processor Unit MPU Microprocessor Unit MPV Mars Piloted Vehicle [NASA OEXP] MPW Macintosh Programmer's Workshop MR Miniatures Rules MR Modem Ready MR Modified READ (Relative element address designate, FAX) MR Monitor Read (flow control bit in IOM2) MRC Medical Research Council MRCA Multi Role Combat Aircraft MRCF Microsoft Realtime Compression Format MRCI Microsoft Realtime Compression Interface MRF Maintenance Reset Function MRI Magnetic Resonance Imaging MRI Magnetic Resonance Imaging MRO Multi-Region Operation MRP Manufacturing Requirements Planning MRP Materials Requirement Planning MRPL Main Ring Path Length MRT Mean Repair Time MRWR Monitor Reader-WRiter [GEC] MS Maintenance State MS ManuScript MS Master of Science MS Memory System MS Menue Software (SIPB.EXE) MS Message Store MS Message Store MS Microsecond MS Microsoft Corporation MS Military Science MS Millisecond MS Most Significant MS Motor Ship MS Multiple Sclerosis MSAV Microsoft Anti Virus MSB Most Signficant Bit; Most Significant Byte MSB Most Significant Bit MSB Most Significant Bit; Most Significant Byte MSB Most Significant Bit, or Byte MSC Manpower Services Commission MSC Media Stimulated Calling MSC MicroSoft C MSCDEX Microsoft CD Extensions [Microsoft] MSCP Mass Storage Control Protocol MSD Management Services Department MSD Mass Storage Device + Most Significant Digit MSD Most Signficant Digit MSD Most Significant Digit MSDOS MS-DOS, Microsoft disc operating system [same as PC-DOS] MS-DOS MicroSoft DOS MS-DOS Microsoft-Disk Operating System [Microsoft] MSDR Multiplexed Streaming Data Request MSDS Microsoft Developer Support [Microsoft] MSE Mobile Subscriber Equipment MSG Message Msg Message MSG MonoSodium Glutamate MSG MonoSodium Glutimate .MSG Program Message (file name extension) MSH Marvel Super Heroes MSI Medium Scale Integration MSI Medium Scale Integration MSL Map Specification Library MSL Mean Sea Level MSN Multiple Subscriber Number (I.251 B) .MSP Microsoft Paint (file name extension) [Microsoft] MSPE Mercenaries, Spies & Private Eyes MSS Management Support System MSS ManuScriptS MSS Mass Storage System [IBM] MSSL Mullard Space Science Lab [UCL] MST Mountain Standard Time MSU Main Service Unit [ICL] MSU Message Signal Unit (SS7) MSW Machine Status Word MT Magnetic Tape MT Metric Ton MT Mountain Time MTA Message Transfer Agent MTA Multiple Terminal Access MTA Message Transfer Agent (X.400) MTA Metropolitan Transportation Authority MTAE Message Transfer Agent Entity (X.400) MTBB Mean Time Between Breakdowns MTBF Mean Time Before Failure + Mean Time Between Failures MTBF Mean Time Between Failures MTBJ Mean Time Between Jams MTF Master Test Frame, MTP Message Transfer Part (SS7: Q.701-Q.710) MTP Message Transfer Protocol (X.411: P1) MTR Magnetic Tape Recording MTR Mechanized Time Reporting MTS Memory Time Swich PEB2040 MTS Message Telecommunications Service MTS Message Telephone Service MTS Message Transfer Service/System + Multichannel Television Sound MTS Mobile Telephone Service MTSC MTS CMOS (512 incoming channels) PEB2045 MTSL MTS Large (1024 incoming channels) PEB2047 MTSO Mobile Telephone Switching Office [telephony] MTSS MTS Small (256 incoming channels) PEB2046 MTTF Mean Time To Failure MTTF Mean Time to Failure MTTR Mean Time to Recovery MTTR Mean Time To Repair MTTR Mean Time To Repair MTU Maintenance Termination Unit MTU Media Tech Unit MTV Music TeleVision MTX Mobile Telephone eXchange MU Message Unit MU5 Manchester University 5 [precursor of the ICL 2900 range] MUF Maximum Usable Frequency (max freq during sunspot activity) MUL Multiply MULDEM MULtiplexer-DEMultiplexer MULTICS MULTiplex(ed) Information (and) Computer Services MUM Multi-User Minicomputer [SERC] MUMPS Massachusetts General Hospital Multi-Programming System MUMPS Massachusetts General Hospital Utility Multi-Programming System (Programming Language) MUMPS Mgh Utility MultiProgram System MUNG Mung Until No Good (see the hacker's dictionary) MUNICH Multichannel (32) Network Interface Controller SAB20320 MUSAC Multipoint Switching and Conferencing Unit PEB2245 MUSE Micro Users in Secondary Education MUX Multiplexer MUX Multiplexer MVA MegaVolt Ampere MVDM Multiple Virtual DOS Machines MVGA Monochrome Video Graphics Array MVP Multiline Variety Package MVS Multiple Virtual Storage MVS Multiple Virtual Storage [IBM] MVT Multiprogramming with a Variable number of Tasks MVT Multiprogramming with a Variable number of Tasks [IBM] MW (Ger) service word MW MultiWink M/W MicroWave MX Mail Exchanger [Internet] MX Missile eXperimental MX Monitor Transmit (flow control bit in IOM2) MXU MultipleXer Unit N North N Notice NA Narcotics Anonymous NA Next Address NA North America NA Not Applicable NAACP Natioanl Association for the Advancement of Colored People NAACP National Association for the Advancement of Colored People NAAS North American Automated Systems co. NAB Natioanal Association of Broadcasters NAB National Association of Broadcasters NABISCO NAtional BIScuit COmpany [Corporate name] NAC Network Administration Center NACCIRN North American Coordinating Committee for Intercontinental Research Networking (see also CCIRN) NACD National Association of Computer Dealers NACS National Advisory Committee on Semiconductors NACS National Advisory Committee on Semiconductors NAD Network Access Device NADGE NATO Air Defense Ground Environment NAE Not Above or Equal NAG Network Architecture Group NAG Numerical Algorithms Group NAGE National Association of Government Employees NAK Negative Acknowledge NAK Negative Acknowledgment NAM Name and Address Module [telephony, cellular phone changeable ROM] NAM National Account Manager [telephony, AT&T specific?] NAM Number Assignment Module [telephony, cellular phone changeable ROM] N-AMPS Narrowband Advanced Mobile Phone system NAND Not AND (Boolean logic) NANP North American Numbering Plan NAPAP National Acid Precipitation Assessment Program NAPLPS North American Presentation Level Protocol + Syntax (graphics) NAPLPS North American Presentation Level Protocol Syntax NAR Nuclear Acoustic Resonance NARDAC NAvy Regional Data Automation Center NAS National Academy of Sciences NAS National Advanced Systems [the Company] NAS Network Application Support [DEC] NAS Numerical and Atmospheric Sciences network NASA National Aeronautics & Space Administration NASA National Aeronautics and Space Administration NASA National Aeronautics and Space Administration NASA National Areonautics and Space Administration NASA/GSFC - NASA Goddard Space Flight Center NASDA National Space Development Agency [Japan] NASI NetWare Asynchronous Services Interface [Novell] NASP National AeroSpace Plane NATO North Atlantic Treaty Organization NAU Network Addressable Unit NAVDAC NAVal Data Automation Command NAVSWC NAV Surface Weapons Center NB Narrow Band NB New Brunswick NB Nota Bene NBA National Basketball Association NBC National Broadcasting Company NBE Not Below or Equal NBFM NarrowBand Frequency Modulation NBI Nothing But Initials NBO Network Build Out NBS National Bureau of Standards NBS National Bureau of Standards (renamed NIST) [US Government] NBVM Narrow Band Voice Modulation NC No Carry + Numerical Control NC No Charge NC No Connection NC North Carolina NC Numerical Control NCA Network Communications Adapter NCA Network Control Analysis NCC National Computer Conference NCC National Computing Centre NCC Network Control Center NCC Network Control Center NCC Notify Corrupted CRC (in EOC) NCCF Network Communications Control Facility NCCL National Council for Civil Liberties NCDC National Climatic Data Center NCE New Catholic Edition NCGA National Computer Graphics Association NCGA National Computer Graphics Association NCIC National Cartographic Information Center NCIC National Crime Information Center NCMT Numerical Control for Machine Tools NCO Non-Commissioned Officer NCP National Car Parks [the Company] NCP NetWare Core Protocol NCP Network Control Point (in a SDN) NCP Network Control Processor NCP Network Control Program NCP Network Control Program NCP Not Copy Protected NCR National Cash Register (Company) NCR National Cash Register [Corporate name] NCS National Communications System NCS Network Computing System NCSA National Center for Supercomputing Applications NCSC National Computer Security Center [NSA] NCSI Network Communications Services Interface [Novell] NCTE Network Channel Terminating Equipment (FCC: NT1) NCTE Network Channel-Terminating Equipment NCTL National Computer and Telecommunications Laboratory NCU Network Control Unit NCV No Commercial Value ND No Date ND North Dakota NDA Non-Disclosure Agreement NDC National Destination Code (area code) NDCC Network Data Collection Center NDDL Neutral Data Definition Language NDE News Development Environment NDEA National Defense Education Act NDEF Not to be Defined NDIS Network Driver Interface Specification NDL Network Database Language NDP New Democratic Party (Canada) NDP Numeric Data Processor NDPCAL National Development Program in CAL [UK] NDRO Non-Destructive Read Out NDSL National Defense Student Loan NDSL National Direct Student Loan NDT Newfoundland Daylight Time NDT Non-destructive Testing NDU Network Data Unit NDV NASP Derived Vehicle .NDX Index (file name extension) NE New England NE North East NEAR National Electronic Accounting and Reporting system NEARnet New England Academic and Research Network NEB National Enterprise Board NEB New English Bible NEBE Near End Block Error (IOM2 Monitor Message) NEBS New Equipment-Building System NEC National Executive Council NEC Nippon Electric Company NEC Nippon Electric Company [Corporate name] NEDC National Economic Development Council [UK: 'Neddy'] NEDO National Economic Development Office NEG Negative + Negate NEI Not Elsewhere Included NEL National Engineering Laboratory NERC Natural Environment Research Council NES National Energy Strategy NES Not Elsewhere Specified NESAC National Electronic Switching Assistance Center NESC National Energy Software Center NET (EC) European standards of telecommunication NET National Educational Television NET National Educational Telivision NET NETwork NET New England Telephone NetBEUI NetBIOS Extended User Interface [IBM] NetBIOS Network Basic Input/Output System [IBM] .NEW New Information (file name extension) NEWS NetWare Early Warning System [Frye Computer] NEWS Network extensible Window System NEXRAD NEXt generation weather RADar NEXT Near-End X-Talk NF (Ger) low frequency NF No Funds NFC National Football Conference NFF No Fault Found NFFE National Federation of Federal Employees NFL National Football League NFS Network File System NFS Network File System NFT Network File Transfer NG National Guard NG No Good NG No Good NGE Not Greater or Equal NH New Hampshire NHC National Hurricane Center NHI National Health Insurance NHL National Hockey League (the "nation" is Canada, BTW) NHLBI National Heart, Lung, and Blood Institute (Bethesda, MD) NHR Non Hierarchial Routing NHS National Health Service NI Network Interface NIC Network Information Center (ARPAnet) NIC Network Information Center [Internet] NIC Network Information Center ("The NIC" is NIC.DDN.MIL) NIC Network Interface Card NIC Numeric Intensive Computing NICAD Nickel Cadmium NID New Interactive Display [NEC] + Next ID NIFTP (a file transfer network in the UK) NIFTP Network Independent File Transfer Protocol NIH National Institute of Health NIH National Institutes of Health NIH Not Invented Here NIJTMP Network Independent Job Transfer & Manipulation Protocol NIM Nuclear Instrumentation Module (an electronic instrumentation standard) NIMH National Institute of Mental Health NIP Nucleus Initialisation Program NIPS Network I/Os Per Second NIS Network Information System (formerly yp) NISO National Information Standards Organization NISO National Information Standards Organization NIST National Institute for Standards and Technology NIST National Institute of Standards and Technology (formerly NBS) NIST National Institute of Standards and Technology [US Government] NITS Network Independent Transport Service NJ New Jersey NJB New Jersey Bell [Telephony] NJE Network Job Entry (protocol) [IBM] NJE Networked Job Entry NJI Network Job Interface NJP Network Job Processing NL National League (baseball) NL New Line NLE Not Less or Equal NLM National Library of Medicine NLM NetWare Loadable Module [Netware] NLP Natural Language Processing NLP Network Layer Protocol NLQ Near Letter Quality NLRB National Labor Relations Board NLS National Language Support [OS/2] NLS Network License Server NM Nautical Mile NM Network Module NM New Mexico NM Night Message NM No Mark; Not Marked NMC Network Management Center NMC Network Management Committee NMI Non-Maskable Interrupt NMOS N channel Metal Oxide Semiconductor (N-MOS) (see MOS) NMOS Negative Channel Metal-Oxide Semiconductor NMOS Negative Metal Oxide Semiconductor NMR Nuclear Magnetic Resonance NMS Network Management System [Novell] NNE North North East NNTP Net News Transfer Protocol NNTP Network News Transfer Protocol [Internet] NNW North North West NNX Network Numbering eXchange NOA NSWC Office Automation NOAA National Oceanic and Atmospheric Administration [US Government] NOAO National Optical Astronomy Observatories (Tucson, Arizona) NOC Network Operations Center NOC Network Operations Center NOCS Network Operations Center System NOP No Operation NOR Not Or NORAD NORth American Defense Command NORGEN Network Operations Report GENerator NORM return to Normal (IOM2 Monitor Command/Message) NORML National Organization for the Reform of Marijuana Laws NOS Network Operating System NOS Not Otherwise Specified NOSC Naval Ocean Systems Center NOTIS Network Operator Trouble Information System NOWP Network Operations Working Party NOx Nitrogen Oxides NP No Protest NP Nondeterministic-Polynomial NP Notary Public NP Noun Phrase NPA Network Printer Alliance NPA No Power Alarm NPA Number Plan Area NPA Numbering Plan Area, or area code [Telephony] NPB Nuclear Physics Board NPC Non-Player Character (see PC) [Role-playing games] NPI Network Printer Interface NPL National Physical Laboratory (UK) NPL Non-Procedural Language NPL Nonprocedural Language NPN Negative-Positive-Negative (transistor) NPN NonProtein Nitrogen NPR National Public Radio NPU Natural Processing Unit NPV Net Present Value NPX Numeric Processor Extension NQS Network Queuing System N(R) (NR) Receive Sequence Number NRA National Reconstruction Act [FDR era US] NRA National Rifle Association NRC National Research Council NRC Nuclear Regulatory Commission NRDC National Research Development Corporation NRE Non-Recurring Engineering (as in NRE costs) NREN National Research and Education Network NREN National Research and Education Network NRL Naval Research Labs NRM Normal Response Mode (HSCX) NRO National Reconnaissance Office NRP Net Requirements Planning NRPB National Radiological Protection Board NRS Name Registration Scheme NRZ Non Return to Zero NRZ Non-Return to Zero NRZ Not Return to Zero NRZC NRZ Change NRZI Non Return to Zero Inverted NRZI Non-Return to Zero Indicates NRZI Non-Return to Zero (Inverted) NRZI Non-Return to Zero Inverted (magnetic tape, 800 bpi) NRZI NRZ Inverted NRZM NRZ Mark NS Nanosecond + Network Supervisor + Non Stop NS Not Specified NS Nova Scotia NS Nuclear Ship N(S) (NS) Transmit Sequence Number NSA National Security Agency [US Government] NSA POLY National Security Agency Polygraph NSC National Security Council [US Government] NSC Network Service Center NSCS Network Service Center System NSE Network Software Environment NSEC Network Switching Engineering Center NSF National Science Foundation NSF National Science Foundation [US Government] NSF Nuclear Structure Facility NSFNET National Science Foundation NETwork NSP Network Service Part (SS7: SCCP+MTP) NSP Network Services Protocol [DEC] NSPMP Network Switching Performance Measurement Plan NST Newfoundland Standard Time NStA (Ger) PBX NSTL National Software Testing Labs NSTS National Space Transportation System [Space] NSW New South Wales (Australia) NSWC Naval Surface Warfare Center NSWC Naval Surface Weapons Center NT Network Termination NT New Technology [Microsoft] NT New Testament NT Newfoundland Time NT Northern Telecom NT Northern Territory NT1 NT serving Layer 1 (NCTE, network interface of NT, NT2 NT serving Layer 1 to 3 (subscriber interface of NT, NTEC Network Technical Equipment Center NTEU National Treasury Employees Union NTF No Trouble Found NTFS New Technology File System [Microsoft] NTIA National Telecommunications and Information Agency NTIS National Technical Information Service NTM NT Test Mode (IOM2 Monitor Message) NTN Neutralized Twisted Nematic NTP Network Time Protocol [Internet] NTP Normal Temperature and Pressure (see STP) NTS Network Technical Support NTS Network Test System NT/S NT Simulator SIPB7020 NTSB National Transportation Safety Board [US Government] NTSC National Television Standards Committee NTSC National Television Standards Committee NTSC Never The Same Color NTT Nippon Telegraph & Telephone NTT Nippon Telephone & Telegraph NTU Network Termination Unit NU Name Unknown NUA (international) Network User Address NUA Network User Address NUC Nailed-up Connection NUI Network User Identification NUI Network User Identification NUI Network User Identifier NUI Network User Interface NUI Notebook User Interface [Go Corporation] NUL Dummy Device NUL No Device NUL Null NUMAC Northern Universities Multiple-Access Computer NUP National User Part NURBS NonUniform Rational B-Spline NUSC Naval Underwater Systems Center [US Government] NUSC Naval Underwater Systems COmmand NUSC Naval Underwater Systems Command NUT National Union of Teachers NV Nevada NV No Overflow NVM Non Volatile Memory (EEPROM) NVM Non-Volatile Memory NVRAM Non-Volatile Random Access Memory NW North West NWI Network Interface NWNET NorthWestNet NWS National Weather Service NWT North West Territories (Australia) NXX NANP syntax for a three-digit string, {[2-9],[0-9],[0-9]} [Telephony] NY New York NYC New York City NYNEX New York and New England (Telephone) NYNEX New York, New England and the unknown (X) NYSE New York Stock Exchange NYSERNet - New York State Educational and Research Network NZ New Zealand NZUSUGI New Zealand Unix System User Group, Inc. OA Office Automation OA Overeaters Anonymous OAG Official Airline Guide + Online Air Guide OAI Open Applications Interface OA&M Operations, Administration & Maintenance (SS7: Q.79X) OAS Office Automation System OAS Organization of American States OASYS Office Automation SYStem OATS Office Automation Technology and Services OBE Order of the British Empire OBJ Object OBS Omni Bearing Selector OC Office Communication OC Operator Centralization OC Order of Canada OCC Other Common Carrier OCDM Office of Civil Defense and Mobilization OCE Open Collaborative Environment [Apple] OCE Other Common carrier channel Equipment OCF Oxford Concordance Program OCI Out of City Indicator OCL Operation Control Language + Operator Control Language OCLC Online Computer Library Center, Inc. OCLC Online Computer Library Center (Ohio College Library Catalog) OCO Object Code Only OCP Order Code Processor [ICL] OCP Origination Point Code (SS7) OCR Optical Character Recognition OCR Optical Character Recognition OCS Officer Candidate School OCU Office Channel Unit OD Doctor of Optometry OD Oculus Dexter (right eye) OD Officer of the Day OD Over Dose OD OverDose ODA Office Document Architecture ODA Office Document Architecture ODAC Operations Distribution Administration Center ODAPI Open Database Application Programming + Interface [Borlund] ODBC Open Database Connectivity (driver) [Microsoft] ODBMS Object-Oriented Database Management System ODD Obtain Domain Descriptor [GEC] ODD Operator Distance Dialing ODDD Operator Direct Distance Dialing ODI Open Datalink Interface [Novell] ODI Optical Digital Image ODISS Optical Digital Image Storage System ODP Off-Disc Pointer [GEC] ODS Open Data Services [Microsoft] ODS Overhead Data Stream ODT Octal Debugging Tool [DEC] OE Old English OECD Organisation for Economic Co-operation & Development OED Oxford English Dictionary OEIC Optoelectronic Integrated Circiut OEM Original Equipment Manufacturer OEM Original Equipment Manufacturer OEO Office of Economic Opportunity OES Order of the Eastern Star OEXP Office of Exploration [NASA] OF Old French OF Overflow Flag OFM Order of Friars Minor OFMT Output Format for Numbers OFNPS Outstate Facility Network Planning System OFS Order of Free State OFS Output Field Separator OFT Optical Fiber Tube OG Original Gum OGT OutGoing Trunk OH Off Hook OH Ohio OIRA Office of Information and Regulatory Affairs OIS Office Information Systems OIS Office Information Systems OIU Office Interface Unit OJT On the Job Training .OLD Old version (file name extension) OLE Object Linking and Embedding [Microsoft] OLI Optical Phone Line Interface [AT&T] OLMC Output Logic Macrocell O-LTM Optical Line Terminating Multiplexer OLTP On-Line Transaction Processing OLTP On-Line Transaction Processing OM Output MUX OMAP Operations and Maintanance Application Part OMB Office of Management and Budget OMC Operating and Maintainance center OMD Orchestral Manouevers in the Dark OMF Object Module Format [ICL] OMF Object Module Format [Microsoft] OMG Object Management Group OMI Open Messaging Interface [Lotus] OMM Output Message Manual OMNS Open Network Management System OMPF Operation and Maintenance Processor Frame OMR Optical Mark Recognition OMS Orbital Maneuvering System OMV Orbital Maneuvering Vehicle [Space] ON Old Norse ONA Open Network Architecture (FCC: Computer Inquiry III) ONAC Operations Network Administration Center ONAL Off Network Access Line ONC Open Network Computing ONC Open Network Computing [Sun] ONI Office of Naval Intelligence ONI Operator Number Identification [telephony] ONP Open Network Provision ONR Office of Naval Research OODB Object-Oriented Database OOL Object-Oriented Language OOP Object Oriented Programming OOPART Out Of Place ARTifact OOPL Object-Oriented Programming Language OOPS Object Oriented Programming and Systems OOPS Object-Oriented Programming System OOS Object-Oriented Systems + Off-line Operating Simulator OP Observation Post OP OFFICEPOWER office automation system, trademark of CCI OP Operation + Optical + Output OP Order of Preachers OP Out of Print OP Outside Plant OP CODE Operational Code OPAC Online Public Access Catlog [Internet] OPC Optical Photoconductor OPC Originating Point Code OPCL disc file OPen and CLose [GEC] OPD Operand OPDU Operations Protocol Data Unit (X.411: P3) OPEC Organization of Petroleum Exporting Countries OPEOS Outside Plant planning, Engineering & construction Operations Sys OPI Open Prepress Interface OPM Office of Personnel Management OPM Operations Per Minute OPM Outside Plant Module OPS Off-Premises Station OPS Operations OPSM Outside Plant Subscriber Module OPT Open Protocol Technology .OPT Options (file name extension) OPUS Octal Program Updating System OPX Off-Premises eXtension OR Operating Room OR Oregon OR Originating Register OR Own Risk OR Owner's Risk ORACLE On-Line Inquiry and Report Generator (UNIX DB program) ORB Office Repeater Bay ORG Overlay oRGaniser [GEC] .ORI Original (file name extension) ORM Optical Remote Module ORNL Oak Ridge National Laboratory OROM Optical Read Only Memorey OROM Optical Read Only Memory ORS Output Record Separator OS Oculus Sinister (left eye) OS Operating System OS Operating System OS Operator Service OS Ordinary Seaman OS Out of Stock OS OutState OS/2 Operating System Two [IBM] OS4000 GEC process based operating system OSA Open System Architecture OSAC Operator Services Assistance Center OSB Order of St. Benedict OSC Operator Services Center OSC Orbital Sciences Corporation [Space] OSC OSCillator OSCAR Orbiting Satelite Carry Amateur Radio (1st launched 12 Dec 1961) OSCAR Orbiting Satellite Carry Amateur Radio (1st launched 12 Dec 1961) OSCAR OS Command AnalyseR [GEC] OSCRL Operating System Command Response Language OSD Office of the Secretary of Defense OSDIT Office of Software Development and Information Technology OSDS Operating System for Distributed Switching OS/E Operating System/Environment OSF Open Software Foundation OSF Open Software Foundation OSF Open Systems Foundation OSF Order of St. Francis OSHA Occupational Safety and Health Administration [US Government] OSI Open Systems Interconnection OSI Open Systems Interconnection (ISO 7 layer model) OSI/RM Open Systems Interconnection/Reference Model OSM Off-Screen Model OSM operating systems messages OSME Open Systems Message Exchange OSO Originating Signaling Office OSP Optical Storage Processor OSP OutSide Plant OSPF Open Shortest Path First OSPS Operator Service Position System OSQL Object Structured Query Language OSS Office of Strategic Services (later CIA) OSS Office Support System OSS Operation Support System [telephony, AT&T?] OSS Operator Service System OSTP Office of Science and Technology Policy OSTP (White House) Office of Science and Technology Policy [US Government] OT Object Technology OT Old Testament OT OverTime OTA Office of Technical Assistance OTA Office of Technology Assessment OTB Off-Track Betting OTC Over The Counter (stocks) OTC Over The Counter stocks OTF Open Token Foundation OTF Open Token Foundation OTH-B Over The Horizon - Backscatter (as in radar) OTL Office Technology Limited [the Company] OT&LF Open Taxi & Limousine Foundation OTR On The Rag OTS Officers' Training School OTV Orbital Transfer Vehicle [Space] OU Open University .OUT Outlines (file name extension) OUTS Output String OUTWATS OUTward Wide Area Telecommunications Service OUTWATS OUTward Wide Area Telephone Service OV Orbiter Vehicle [Space] OV Overflow .OVL Program Overlay (file name extension) .OVR Program Overlay (file name extension) OVST (Ger) local exchange OW Over-Write OWG Optical Wave Guide OWL Object Windows Library + Open Windows Library [Borland] OWTTE Or words to that effect PA Pennsylvania PA Per Annum PA Play Aid PA Power Allarm PA Power of Attorney PA Press Agent PA Private Account PA Program Address PA Public Address PA Purchasing Agent PABX Private Automatic Branch Exchange PABX Private Automatic Branch eXchange [telephony] PACE Program for Arrangement of Cables and Equipment PACT Prefix Access Code Translator PACX Private Automatic Computer eXchange [Gandalf] PAD Packet Assembler & Disassembler PAD Packet Assembler/Disassembler PAD Packet Assembler/Disassembler PAD Packet Assembler-Disassembler (for networking) PAD Packet Assembly/Disassembly PADS Pen Application Development System [Slate Corporation] PAFEC Program for Finite Element Calculations PAH Polycyclic Aromatic Hydrocarbon .PAK Packed (file name extension) PAL Paradox Applications Language [Borlund] PAL Phase Alternate Line PAL Phase Alternation Line [colour TV] PAL Phase Alternation Line-rate PAL Programmable Array Logic PAL Programmable, or Programmed Array Logic PAL Programmed Array Logic PAL Programming Assembly Language PALC Plasma-Addressed Liquid Crystal (display) PALS Principles of the Alphabet Literacy System PAM Pass Along Method (SS7: in ISUP) PAM Payload Assist Module [Space] PAM Primary Access Method PAM Pulse Amplification Modulation PAM Pulse-Ampitude Modulation PAN Personal Account Number PANS Pretty Advanced New Stuff PAO Program Advisory Office PAP Passwork Authentication Protocol (protocol) PAR Parallel P/AR Peak-to-Average Ratio PARA Paragraph PARC Palo Alto Research Center [XEROX] PARC Palo Alto Research Center, xerox PARC Palo Alto Research Laboratories, California [Xerox] PAS Paged Address Space [GEC] PAS Program Activity Sampler [ICL] PAS Protocol Architecture Specification for IOS (PCT) PAS Public Announcement Service .PAS PASCAL source code (file name extension) PASCAL not an acronym, programming language named after Blaise Pascal PASCAL (Programming Language named for Blaise Pascal) PASS Personal Access Satellite System [NASA] PAST Process Accessible Segment Table [GEC] PAT Power Alarm Test .PAT Patch (file name extension) PATROL Program for Administrative Traffic Reports On Line PATROL Program for Admistrative Traffic Reports On Line PAX Private Automatic eXchange PAYE Pay As You Earn PBC Peripheral Board Controller PEB2050/51 PBC Peripheral Bus Computer PBC Processor Bus Controller PBD Pacific Bell Directory PBE Prompt By Example PBM Play By Mail game PBS Public Broadcasting System PBX Private Branch eXchange [telephony] PC Peace Corps PC PerCent; PerCentage PC Personal Computer + Printed Circuit + Program Counter PC Personal Computer [IBM wants you to believe a specific kind] PC Player Character (see NPC) [Role-playing] PC Plug Compatible PC Post Card PC Post Cibum (after meals) PC Power Controller PC Primary Center PC Privileged Character PC Privy Council PC Program Counter PC Progressive Conservative party (Canada) PC/AT Personal Computer/Advanced Technology PCB PolyChlorinated Biphenyl PCB Printed Circuit Board PCB Printed Circuit Board + Program Control Block PCC Programmable Communications Controller [GEC] PCDA Program Controlled Data Acquisition PCDOS PC-DOS, Personal computer disc operating system [same as MS-DOS] PC-DOS Personal Computer - Disk Operating System (IBM version of MSDOS) PC-DOS Personal Computer DOS PCH Parallel CHannel PCI Panel Call Indicator PCI Peripheral Component Interconnect [Intel] PCIE President's Council on Integrity and Efficiency PC-I/O Program Controlled I/O PCIRC Printed circuit board draughting aid [SERCnet GECs & Pr1mes] PCL PCM data Clock PCL Printer Command Language PCL Printer Command Language [HP] + Process Control Language PCM Personal Computer Manufacturer + Pulse Code Modulation PCM Plug-Compatible Mainframe PCM Pulse Code Modulation PCMCIA Personal Computer Memory Card International Association PCMIA PC Memory-Card International Association PCN Personal Communication Network (UK, mobile comm.) PCNFS Personal Computer Network File System PCO Peg Count and Overflow PCOE Port Of Entry PCON Process CONtrol module [GEC] PCPC Personal Computers Peripheral Corporation PCR Preventive Cyclic Retransmission (SS7: in MTP) PCS Patchable Control Store PCS Permanent Change of Station PCS Personal Communication Services PCS Planning Control Sheet PCS Print Contrast Signal PCS Process Control Systems PCS Program Counter Store PCS Programmable Drive Table PCS Project Control System PCSN Public Circuit Switched Network (?) PCT IOS Program Coding Tools (SDL oriented) SIPO6021 .PCT Picture (file name extension) PCTE Portable Common Tools Environment PCTS Posix Conformance Test Suite PCTV Program Controlled TransVerters .PCX Picture Image (file name extension) PD Per Diem PD Peripheral Decoder PD Police Department PD Potential Difference PD Public Domain PD Public Domain PDA Personal Digital Assistant PDAD Proposed Draft ADdendum PDC Primary Digital Carrier PDE Partial Differential Equation PDES Product Data Exchange Specifications PDF Power Distribution Frame PDF Program Development Facility PDF Program Development Facility .PDF Printer Description (file name extension)[Borlund,Lotus] PDI Power and Data Interface PDL Page Description Language PDL Page Description Language PDL Program Description Language PDL Program Design Language PDL Program Design Language PDM Power Down Mode PDMS Plant Design Management System [Compeda] PDN Public Data Network PDN Public Data Network PDP Plasma Display Panel PDP Progammable Data Processor (DEC) PDP Programmed Data Processor [DEC] PDQ Pretty Damned Quick PDS Packet Driver Specification + Partitioned Data Set PDS Partitioned Data Set [IBM] PDS Premises Distribution System [AT&T] PDSMAN Partitioned DataSet MANagementSystem PDSP Peripheral Data Storage Processor PDSS Post Development and Software Support PDT Pacific Daylight Time PDT Programmable Drive Table PDT Programmed Data Terminal ? [DEC] PDU Protocol Data Unit (X.400) .PDX Paradox files (file name extension) [Borlund] PE Parity Even + Protect Enable PE Peripheral Equipment PE Phase Encoded PE Physical Education PE Prince Edward island PE Printer's Error PE Professional Engineer PE Protestant Episcopal PEA Pocket Ethernet Adapter PECC Product Engineering Control Center PEI Prince Edward Island PEL Picture Element [IBM] PEN SDK Pen Computing Software Development Kit PEP Packetized Ensemble Protocol [Telebit] PEP Productivity Enhancement Project PEPE Pepe Est Presque Emacs PERA Production Engineering Research Association PERL Pathologically Eclectic Rubbish Lister PERL Practical Extraction and Report Language PERQ Pascal Executed Really Quickly ? PERQ Personal Q-code computer ? [ICL/Three Rivers] PERT Program Evaluation and Review Technique PERT Project Evaluation Review Technique PES Positioning Error Signal PES Processor Enhancement Socket PET Print Enhancement Technology [Compaq] PEX Phigs/phigs+ Extension to X P/F Poll/Final Bit PFK Program Function Key .PFM Printer Font Metrics (file name extension) [Windows] PFOFF Power Feed OFF (C/I channel code) PFPU Processor Frame Power Unit PFR Power-Fail Restart PFS Page Format Selection (Teletex) PFS PCM Frame Synchronisation Signal PGA Pin Grid Array + Professional Graphics Adapter [IBM] PGA Professional Graphics Adapter PGA Pure Grain Alcohol PGCE Post Graduate Certificate in Education PGDN Page Down .PGL Graphics (file name extension) [Hewlett-Packard] PGM Program .PGP ProGram Parameter (file name extension) [AutoCAD] PGUP Page Up PH Packet Handler PH Parity High bit PH- Physical- PHA Pulse Height Analyser (or Analysis) PHA Pulse Height Analyzer (or Analysis) PHIGS Programmers' Hierarchial Interactive Graphics + Standards PHIGS Programmers Hierarchial Interactive Graphics System PHIGS Programmers Hierarchical Interactive Graphics System .PHO Phone List (file name extension) PHPR PHoenix PRinter, device on CAGA to route to CUDN (viz) printers PHS Public Health Service PHX PHoeniX (the Cambridge IBM Operating System) PhysRev Physical Review Journal - Phys Rev PI Program Interruption PIA Peripheral Interface Adapter PIA Peripheral Interface Adaptor PIA Plug-In Administrator PIC PCM Interface Controller PEB2052 PIC Plastic-Insulated Cable PIC Plastic/Polyethelene Insulated Cable [telephony] PIC Position Independant Code PIC Primary Independent Carrier PIC Priority Interrupt Controller + Program Interrupt Controller .PIC Graph (file name extension) [Lotus 1-2-3] [LDC] PICS Plug-in Inventory Control System (PICS/DCPR) PID Process Identification Number PIF Paid In Full PIF Program Information File PILOT Programmed Inquiry Learning Or Teaching PILOT Programmed Instruction Learning Or Teaching [CAL language] PIM Personal Information Manager PIN Packet INterpreter [reverse PAD] PIN Personal Identification Number PIN Personal Identification Number PIO Parallel Input/Output + Processor Input/Output + Programmed Input/Output PIOCS Physical I/O System PIP Packet Interface Port PIP PCM Interface Port PIP Peripheral Interchange Program [DEC] PIP Picture In Picture + Programmable Interconnect Point PIPO Parallel In, Parallel Out PIT Principal, Interest, and Taxes PIT Programmable Interval Timer PIU PCM Interface Unit PIXEL PIcture ELement PIXEL Picture Element PKT Packet PL Parity Low bit PL Plus PL1 PL/1, Programming Language number 1 [IBM] PL/1 Programming Language One PLA Programmable Logic Array PLA Programmable Logic-Array PLATO Programmed Learning for Automated Teaching Operations [U. Ill., early '70s] PLATO Programmed Logic for Automatic Teaching Operation [CDC] PLATO Programmed Logic for Automatic Teaching Operations PLC Physical Link Control (IOS) PLC Programmable Logic Controller PLC Programmable Logic Controller PLCC Plastic Leaded Chip Carrier PLCC Plastic Leadless Chip Carrier PLD Partial Line Down (Teletex) PLD Programmable Logic Device PLIC PCM Line Interface PLL Phase Lock Loop PLL Phase Locked Loop PLL Phase Locked Loop PLL Phase-Locked Loop .PLL Prelinked Library (file name extension) [Clipper] PLM Programming Language for Microcomputers PL/M Programming Language for Micros PLO Palestine (sic?) Liberation Organization (?) PLO Please Leave On PLPA Pagable Link Pack Area [MVS] PLU Partial Line Up (Teletex) PLV Production Level Video PM PayMaster PM Peripheral Module PM Phase Modulation PM Plant Management PM Police Magistrate PM Post Meridiem (after noon) PM PostMaster PM PostMortem PM Presentation Manager [IBM] + Preventative Maintenance PM Preventative Maintenance PM Preventive Maintenance PM Prime Minister PM Provost Marshal PMAC Peripheral Module Access Controller PMMU Paged Memory Management Unit PMO Prime Minister's Office PMOS P channel Metal Oxide Semiconductor (P-MOS) (see MOS) PMOS Positive Channel Metal Oxide Semiconductor PMOS Positive Metal Oxide Semiconductor PMT PhotoMultiplier Tube PMU Precision Measurement Unit PM/X Presentation Manager for X windows PN Promissory Note PN Pseudo Noise (Code) PNB Pacific Northwest Bell PNP Positive-Negative-Positive (transistor) PNP Private Numbering Plan (I.255 B) PNPN Positive-Negative-Positive-Negative devices PO Parity Odd PO Petty Officer PO PettyOfficer PO Post Office PO Postal Order PO Purchase Order POB Periphal Order Buffer POC Point Of View POC Port Of Call POD Pay On Delivery POE Port Of Embarkation POE Port Of Entry POEU Post Office Engineering Union POF Programmable Operator Facility POGO Polar Orbiting Geophysical Observatory POL Problem Oriented Language POLIGON integrated circuit design system [Compeda] POM Phase Of Moon POP Point Of Presence [MCI] + Pop from Stack + Post Office Protocol POP Point of Presence [telephony] POPA Pop All Registers POPF Pop Flags POPS Paperless Order Processing System POR Price On Request POS Point Of Sale POS Point Of Sale + Positive + Programmable Object Select P/OS 'Professional' Operating System [DEC] POSI Promoting conference for OSI POSIX Portable Operating System for unIX POSIX Portable Operating System Interface POSIX Portable Oprating System Environment Standard [IEEE] POST Power-On Self Test POSTNET Postal Numeric Encoding Technique POTS Plain Old Telephone Service POTV Personnel Orbit Transfer Vehicle [Space] POV Point Of View POW Prisoner Of War PP Parcel Post PP Past Participle PP Post Pay PP Primary Point (or dial Post Pay payphone) PPB Parts Per Billion PPC Particle Physics Committee PPC Pour Prendre Conge' (to take leave) PPCS Person to Person, Collect, Special [telephony] PPD Peripheral Pulse Distributor PPDS Personal Printer Data Stream [IBM] PPM Pages Per Minute PPM Parts Per Million PPN Parameterized Post-Newtonian formalism for general relativity PPN parameterized post-Newtonianformalism for general relativity PPN Project Programmer Number PPN Public Packet Switching PPP Point-to-Point Protocol PPP Point-to-Point Protocol [Internet] PPP Point-to-Point Protocol (successor to SLIP (q.v.)) pps Packets per Second PPS PostPostScriptum PPS Product Performance Surveys PPS Public Packet Switching network PPSN Public Packet Switched Network PPT Parts Per Trillion PPT Pulse Pair Timing PPT Punched Paper Tape PPU Power Providing Unit PQ Province of Quebec PR PayRoll PR Public Relations PR Puerto Rico PRB Physical Random Binary file [GEC] PRC Planning Research Corporation PRCA Puerto Rico Communications Authority .PRD Printer Driver (file name extension) [Word] PREIFP PRE-processor InterFace Program for SERC finite element system PREMIS PREMises Information System PREPnet Pennsylvania Research & Economic Partnership Network PREUSE not acronym, a macro which gives access to FEMGEN User Library .PRF Preferences (file name extension) [Grammatik IV] PRI Primary Rate Interface (ISDN) [telephony] PRMD Private Mangement Domain [X.400} PRN Printer PRN pro re nata [medicine] (as needed?) .PRO Profile (file name extension) PROC Procedure PROFS PRofessional OFFice automation System PROFS Professional Office System [IBM] PROFS Professional Office System [IBM] PROG Program + Programmer PROLOG PROgramming in LOGic PROLOG Programming In Logic (Programming Language)(See HLL) PROM Programmable Read Only Memory PROM Programmable Read Only Memory PROM Programmable Read-Only Memory PROMATS PROgrammable Magnetic Tape System PROSPER financial planning and modelling system [ICL] PROTEL PRocedure Oriented Type Enforcing Language PRS Personal Response System .PRS Printer (file name extension) [WordPerfect] PRT Physical Random Text file [GEC] PRTC Puerto Rico Telephone Company PRTSC Print Screen PS Packet Switching PS PicoSecond PS PostScript PS PostScriptum (latin: written after) PS Power Steering PS Power Supply PS Program Store PS Proportional Spacing PS Public School .PS PostScript (file name extension) PS/2 Programming System 2 [IBM] PSA Prefixed Save Area [MVS] PSA Problem Statement Analyzer PSAP Public Safety Answering Point PSB Physical Sequential Text file [GEC] PSC Pittsburgh Supercomputer Center PSC Polar Stratospheric Clouds PSC Prime Service Contractor PSC Product Service Center PSC Public Safety Calling system PSC Public Service Commission PSDC Public Switched Digital Capability PSDN Packed-Switched Data Network (T.70) PSDS Public Switched Digital Service [telephony, AT&T?] PSE Packet Switch(ing) Exchange PSE Programming Support Environment PSF Packet Switching Facility PSF Permanent Swap File PSG Platoon Sergeant PSI Packetnet Switching Interface [DEC] PSIU Packet Switch Interface Unit PSK Phase Shift Keying PSK Phase-Shift Keying PSL IOS Protocol Source Library PSL Problem Statement Language PSM Packet Service Module PSM Position Switching Module PSN Packet Switched Network PSN Public Switched Network PSO Pending Service Order PSP Program Segment Prefix PSPDN Packed-Switched Public Data Network PSR Phase Shift Register PSR "Product Specific Realizations P-SRAM Pseudo-Static Random Access Memory PSS Packet Switch Stream (Service) PSS Packet Switched Services PSS (unknown to me, but something in the UK environment) PST Pacific Standard Time PST Physical Sequential Text file [GEC] PST SIDES Protocol Software Development PSTN Public Switched Telephone Network (T.70) PSU Power Supply Unit PSU Program Storage Unit PSW Program Status Word PSW Program Status Word [IBM] PT Pacific Time PT Page Table PT Patrol Torpedo (as in PT boat) PT Physical Therapy PT Physical Training PT Program Timer P/T Part Time PTA Parent-Teacher Association PTAT Private Trans Atlantic Telecommunications PTD Parallel Transfer Disk PTD Parallel Transfer Disk Drive PTF Programming Tempory Fix PTFE PolyTetraFlouroEthylene [Teflon] PTN Plant Test Number [telephony:actual number assigned for 800 service] PTO Patent and Trademark Office PTO Please Turn Over PTO Power Take-Off PTT Post, Telephone and Telegraph administration PTT Postal Telephone and Telegraph PTV Passenger Transport Vehicle [Space] PTW Primary Translation Word PU Power Up (C/I channel code) PUB Publication + Publish .PUB Publication (file name extension) [Ventura] PUC Peripheral Unit Controller PUC Public Utilities Commision PUC Public Utilities Commission PUG Pr1me User Group PUM PU Mode PUS Processor Upgrade Socket PUSHA Push All Registers PUSHF Push Flags PUT Progrm Update Tape PV Process Vector [GEC] PVC Permanent Virtual Circuit PVC PolyVinylChloride PVM Pass-through Virtual Machine (protocol) [IBM] PVN Private Virtual Network PVO Pioneer Venus Orbiter PW PassWord control [GEC] PW Prisoner of War (usually POW) PWB Printed Wire Board + Programmer's Workbench [Microsoft] PWG Permanent Working Group PWGEN PassWord GENerator? [SERCnet GEC computers] PWM Pulse Width Modulation PWR Power PWR Pressurised Water Reactor PX Post eXchange (see also BX) PX Post eXchange (see BX) .PX Primary Index (file name extension) [Paradox] QA Quality Assurance QA Quality Assurance QAM Quadrature Amplitude Modulation QAM Quadrature Amplitude Modulation QAM Quadrature-Amplitude Modulation QAS Quasi-Associated Signaling QBE Query By Example QBF Query by Form QBUS equipment interface bus used on DEC LSI-11 computers QC Quality Control QC Quality Control QC Queen's Counsel Q-CIF Quarter CIF (for ISDN low end video) QD Quaque Die (daily) QDA Quantity Discount Agreement .QDI Dictionary (file name extension) [Quicken] QDOS Quick and Dirty Operating System .QDT Data (file name extension) [Quicken] QED Quod Erat Demonstrandum (which was to be demonstrated) QEF Quod Erat Faciendum (which was to be done) QEI Quod Erat Inveniendum (which was to be found out) QET Quantum Effect Transistor QFA Quick File Access QIC Quality Information Using Cycle Time [Hewlett-Packard] QIC Quarter-Inch Cartridge QIC Quarter-Inch Cartridge QID Quater In Die (four times a day) QID Quater In [medicine] Die (four times a day) .QIF Quicken Interchange Format (file name extension) QLI Query Language Interpreter QM QuarterMaster QMC QuarterMaster Corps QMC Queen Mary College [London] QMCCC Queen Mary College Computer Centre QMF Query Management Facility QMG QuarterMaster General QMP Quality Measurement Plan QMS Quality Micro Systems .QMT Memorized List (file name extension) [Quicken] QNS Quantity Not Sufficient .QNX Indexes to Data (file name extension) [Quicken] QPSK Quadrature Phase Shift Keying QRSS Quasi Random Signal Source QSAM Queued Sequential Access Method [IBM] QSC Quad S Interface Circuit PEB2084 QSS Quality Surveillance System QTAM Queued Telecom Access Method QTAM Queued Telecommunications Access Method [IBM] QTP Query Transfer Protocol QUANGO Quasi-Autonomous Non-Governmental Organisation QUASAR QUASi stellAR radio source q.v. ???? (Latin(?): which see) QWERTY first six keys from left on top alphabetic row of standard keyboard R Ring R Rolemaster RA Rate Adaption RA Regular Army RA Research Assistant RA Return Authorization RA Royal Academy RAAF Royal Australian Air Force RACE Random Access Card Equipment RACEP Random Access and Correlation for Extended Performance RACF Resource Access Control Facility RACF Resource Access Control Facility RAD Radiation Absorbed Dose RAD Rapid Access Disk RAD Receive Adress RADAR RAdio Detecting And Ranging RADAR RAdio Detection And Ranging Radar RAdio Detection And Ranging RADM Rear ADMiral RAF Royal Air Force RAG Row Address Generator RAID Redundant Arrays of Independent Disks RAID Redundant Arrays of Inexpensive Disks RAL Resource ALlocator [GEC] RAL Rutherford Appleton Laboratory RALCULC Rutherford Appleton Laboratory Computer User Liason Committee RALU Register Arithmetic Logic Unit RAM Random Access Memory RAM Random Access Memory RAMDAC Random Access Memory Digital-to-Analog + Converter [Sierra] RAND Random RAND Rural Area Network Design RAO Regional Accounting Office RAO Revenue Accounting Office RAP Rapid Application Prototyping RAPPORT portable relational database management system [Logica] RAR Return Address Register RARDE Royal Armaments Research and Development Establishment RARE Research Academic R(something) Europe (a Research Network) RAS Random Access Storage RAS Reliability, Availability and Serviceability RAS Reliability, Availability, and Serviceability RAS Row Address Select RASC Residence Account Service Center RASTEROP - RasterOp, hardware instructions on PERQ for fast graphics RASTOP Primitives for fast graphical manipulations [BBN] RATFOR RATional FORtran ['Software Tools', Kernighan & Plauger] RB Rhythm and Blues (commonly R and B) RB Right Button (of 2 or 3 button Mouse) R&B Rhythm and Blues (commonly R and B) RBBS Remote Bulletin Board System RBC Red Blood Cells RBC Red Blood Count RBEF Read Block Error counter for Far end (IOM2 Monitor Command) RBEN Read Block Error counter for Near end (IOM2 Monitor Command) RBHC Regional Bell Holding Company RBI Runs Batted In RBOC Regional Bell Operating Company RBOC Regional BOC RBOR Request Basic Output Report RC MAC Recent Change Memory Administration Center RC Red Cross RC Regional Center RC Resistance-Capacitance RC Resistive-Capacitive RC Resistor-Capacitor circuit (as in filters) RC Roman Catholic RCA Radio Corporation of America [Corporate name] RCAF Royal Canadian Air Force RCAS Reserve Component Automation System RCC Radio Common Carrier RCC Remote Cluster Controller RCC Request Corrupted CRC (in EOC) RCC Reverse Command Channel RCF Remote Call Forwarding RCI Read Controller Interface (IOM2 Monitor Command) RCL Rotate Carry Left RCL Route Clock RCLDN Retrieval of Calling Line Directory Number RCM Remote Carrier Module RCMP Royal Canadian Mounted Police RCP Remote Copy RCP Restore Cursor Position RCR Rotate Carry Right RCRE Receive Corrected Reference Equivalent RCS Records Communications Switching System RCSC Remote Spooling Communications Subsystem RCU Radio Channel Unit RCU Repeater Control Unit (i.e. ASIC between two IEC-Q2s) RCVR ReCeiVeR RD Receive Data RD Received Data + Remove Directory RD Research and Development (commonly R and D) RD Rural Delivery R&D Research and Development R&D Research and Development (commonly R and D) RDA Remote Data Access RDA Remote Database Access RDB Receive Data Buffer RDB Relational Data Base RDBMS Relational Data Base Management System RDBMS Relational DataBase Management System RDBMS Relational Database Mangement System RDCLK Received Timing Clock RDES Remote Data Entry System RDF Radio Direction Finding RDS Radio Digital System RDS Running Digital Sum RDSR Receiver Data Service Request RDT Radio Digital Terminal RDY Resynchonisation indication after loss of framing RE Radiated Emission (EME) REA Rail Express Agency REC Receiver REC Regional Engineering Center .REC Recorder (file name extension) RECON Reconnaissance REF a reference to a file [GEC] .REF Reference (file name extension) REG Register REGAL Rigid Epoxy Glass Acrylic Laminate REJ Reject (LAP-D Command/Response, I.451) REL Release (I.451) RELSECT Relative Sector REM Rapid Eye Movement REM Remark + Remote + Ring Error Monitor REM Remote Equipment Module REMOBS REMote OBservation System REMSH Remote Shell REMUS 3D modelling [Shape Data, Camb.] REN Rename REN Ring Equivalence Number REO R. E. Olds REO Removable, Erasable, Optical REP Repeat REPE Repeat while Equal REPNE Repeat while Not Equal REPNZ Repeat while Not Zero REPZ Repeat while Zero REQ Request RES Remote Execution Service RES Reset + Resolution RES Reset (C/I channel code) RES Resume (I.451) .RES Resource (file name extension) RES1 Reset receiver (C/I channel code) RET Resolution Enhancement Technology [HP] + Return RETMA Radio [something(equipment?)? something?] Manufacturers' Association (????) REV Reverse Charging (I.256 C) REX Relocatable Executable REXX REstructred eXtended eXecuter language REXX Restructured EXtended eXecutor REXX Restructured Extended Executor (language) [IBM] RF Radio Frequency RF Radio Frequency RFC Request For Comments (ARPA Internet) RFC Request For Comments [Internet] RFD Rural Free Delivery RFI Radio Frequency Interference RFP Request for Proposal RFP Request for Proposal RFP Request For Proposals RFQ Request for Quote RFS Ready For Sending RFS Remote File System RFS Remote File System RFT Revisable Form Text + Rich Text Format RFU Reserved For Future Use RGB Red Green Blue RGB Red, Green, Blue (as in colour TV) RGB Red-Green-Blue (color model) RGO Royal Greenwich Observatory RGP Raster Graphics Processor RH Right Hand RHC Regional (Bell) Holding Company RHC Royal Hollaway College RHIP Rank Has Its Privileges RHS Right Hand Side RI Referential Integrity RI Rhode Island RIACS Research Institute for Advanced Computer Science (NASA) RIAS Radio In the American Sector, berlin RID Read Identification (IOM2 Monitor Command) RID Remote Isolation Device RIF Reading Is Fundamental RIF Reduction In Force RIFF Resource Interschange File Format [Microsoft] RILM Repertoire International de Literature Musicale RIM Remote Installation and Maintenance [Microsoft] RIM Resource Initialisation Program RIME RelayNet International Message Exchange RIP Raster Image Processor + Routing Information Protocol [Novell] RIP Rest In Peace (or Requiescat In Pace : latin) RIP Routing Interchange Protocol RISC Reduced Instruction Set Computer RISC Reduced Instruction Set Computer RISLU Remote Integrated Services Line Unit RITA Recognition of Information Technology Achievement award RJE Remote Job Entry RJE Remote Job Entry [IBM] RJP Remote Job Processing RKW (Ger PCM30) FAS RL Return Loss RL Rutherford Laboratory [now RAL] RLC Release Complete Message (SS7: in SCCP) RLC Resistor Inductor Capacitor RLCM Remote Line Concentrating Module RLE Run Length Encoded RLG Research Libraries Group RLIN Research Libraries Information Network [run by RLG (q.v.)] RLIX RAL multi-user shell extensions to basic GEC OS4000 [1982] RLL Run Length Limited RLL Run Length Limited RLN Remote LAN Node [DCA] RLOGIN Remote Login RLSD Received Line Signal Detected RLSD Released Message (SS7: in SCCP) RLSI Ridiculously Large-Scale Integration RLT Remote Line Test RM Reset Mode RMA Radio Manufacturers' Association RMA Return Material Authorization RMA Return Materials Authorization RMA Return to Manufacturer Authorization RMAN Resource MANager [of SERCnet GEC computer] RMAS Remote Memory Administration System RMATS Remote Maintenance Administration and Traffic System [telephony] RMCS Royal Military College of Science, Shrivenham RMDIR Remove Directory RMF Resourece Measurement Facility RML Research Machines Limited, of Oxford RMON Remote Monitor/Monitoring RMR Remote Message Registers RMS Record Management Services + Root Mean Square RMS Recovery Management Support[MVS] RMS Remote Manipulator System [Space] RMS Richard M. Stallman RMS Root Mean Square RMS Royal Mail Ship RN Reference Noise RN Registered Nurse RN Royal Navy RNA Ribonucleic Acid RND Random RNOC Regional Network Operations Center RNR Receive Not Ready (LAP-D Command/Response) RNZAF Royal New Zealand Air Force RO Read Only RO Receive Only R-O Read Only R/O Read/Only ROB Remote Order Buffer ROC Regional Operating Company ROE Royal Observatory, Edinburgh ROFF Run-OFF ROFF text formatter available under Unix [Bell Laboratories] ROFFMACS - 'macros' for use with the RUNOFF text formatter on SERCnet ROG Receipt Of Goods ROH Receiver Off Hook ROK Republic of Korea ROL Rotate Left ROM Range Of Motion (medical) ROM Read Only Memory ROM Read Only Memory ROM Rupture Of Membrane (as in birth) ROMULUS 2.5D modelling package [Shape Data, Camb.] ROR Rotate Right ROSE Remote Operation Service Element (TCAP subset) ROSE Remote Operations Service Entity (per ISO/CCITT layer 7) ROTC Reserve Officers' Training Corps ROTL Remote Office Test Line ROTS Rotary Out Trunks Selectors ROYGBIV Red, Orange, Yellow, Green, Blue, Indigo, Violet RP Repeater RPC Real Procedure Call + Remote Procedure Call RPC Remote Procedure Call RPFC Read Power Feed Current value (IOM2 Monitor Command) RPG RePort Generator RPG Report Program Generator [IBM] RPG Report Program Generator (Programming Language) RPG Role Playing Game RPL Resident Programming Language + Requested Privilege Level RPM Revolutions Per Minute RPM Routine Preventative Maintenance RPN Reverse Polish Notation RPO Railway Post Office RPOA Recognized Private Operating Agency RPPROM Reprogrammable PROM RPQ Request for Price Quotation RPS Revolutions Per Second RPS Rotational Position Sensing RPT Repeat RPV Remotely Piloted Vehicle RQ RuneQuest RQBE Relational Query By Example [Fox Pro] RQS Rate/Quote System RQSM Regional Quality Service Management RR RailRoad RR Receive Ready (LAP-D Command/Response) RR Route Relay RR Rural Route R&R Rate & Route RRE Royal Radar Establishment RRO Rate and Route Operator [telephony] RRO Reports Receiving Office RS Radiated Susceptibiltiy (EMS) RS Radio Shack + Request to Send + Recommended Standard (as in RS-232) [EIA] RS Record Separator (ASCII Control) RS Recording Secretary RS Reset RS Revised Status RS Right Side RS Royal Society RS232 American stand'd for term/MODEM interconnection [same as V24] RSA Repair Service Attendant RSB Repair Service Bureau RSC Remote Switching Center RSC Reset Confirm (SS7: in SCCP and ISUP) RSC Residence Service Center RSCS Remote Source Control System RSCS Remote Spooling & Communication Subsystem [IBM] RSCS Remote Spooling Communications Subsystem RSCS Remote Spooling Communications System R&SE Research & Systems Engineering RSFSR Russian Soviet Federated Socialist Republic RSG Replacement System for G-EXEC [NERC] RSL Request-and-Status Link RSLE Remote Subscriber Line Equipment RSLM Remote Subscriber Line Module RSM Real Storage Manager RSM Remote Switching Module RSN Real Soon Now RSP Required Space Character RSP Robot Support Scheme, or Project [DoI] RSS Remote Switching System RST Reliability Shakedown Testing RST Reset + Restart RSTS Resource Sharing Time Sharing [Digital] RSTS Resource-Sharing Time-Sharing [DEC operating system] RSTS/E Resource System Time Sharing/Enhanced RSU Remote Switching Unit RSV Revised Standard Edition RSVP Repondez S'il Vous Plait (please reply) RSWC Right Side up With Care RSX Real Time Resource Sharing Executive RSX11 Real time eXecutive [DEC PDP11 operating system] RSY Resynchronizing (C/I channel code) RSYD RSY Downstream RSYU RSY Upstream RT RadioTelephone RT Real Time + RISC Technology + Run Time RT RealTime RT Remote Terminal (opposite to COT) RT11 Real Time [DEC PDP11 operating system] RTA Remote Trunk Arrangement RTA Remote Trunking Arrangement RTAC Regional Technical Assistance Center [telephony] RTAM Remote Terminal Access Method RTAM Remote Terminal Access Method RTB Retransmission Buffer RTC Real-Time Clock RTCA Radio Technical Commission of Aeronautics RTF Rich Text Format RTF Rich Text Format RTFM Read The @!# Manual RTFM Read The F***ing Manual RTG Radioisotope Thermoelectric Generator RTL Register Transfer Language + Resistor Transistor Logic + Run Time Library RTL Resistor Transistor Logic RTL Resistor-Transistor Logic RTL2 Real Time Language [ICI/SPL] RTLS Return To Launch Site (Shuttle abort mode) [NASA, Shuttle] RTM Regional Telecommunications Management RTM Remote Test Module RTM Response Time Monitor RTN Return to Normal (in EOC) RTOS Real-Time Operating System RTR Reel-To-Reel RTS Remote Testing System RTS Request To Send RTS Request To Send RTSE Reliable Transfer Service Element RTTY Radio Teletype RTTY Radio Teletypewriter (Communications) RTU Remote Trunking Unit RTU Right To Use RTV Real Time Video RTZ Rio Tinto Zinc RU Receive Unit RUM Remote User Multiplex RUNOFF text formatter available on SERCnet GECs and Pr1mes RW Right Worshipful RW Right Worthy R/W Read Write R/W Read/Write RWC Remote Work Center RWM Read-Write Memory R/WM Read/Write Memory RX Receiver RX Remote eXchange RXD Received Data RxSD Receive Serial Data RZ Return to Zero (-> NRZ) S Sleeve S South S Supplement S- Supervisory (S-Frames) SA Salvation Army SA Seaman Apprentice SA Service Assistant SA Sex Appeal SA Sine Anno (without date) SA SOuth Africa SA South Africa SA South America SA Subject to Approval SAA South Atlantic Anomaly SAA System Applications Architecture (for PS/2) SAA Systems Application Architecture SAA Systems Application Architecture [IBM] SABME Set Asynchronous Balanced Mode (ABM) Extended (LAP-D Command) SAC Service Access Connector (-> SIPB) SAC Service Area Code SAC Service Area Computer SAC Special Area Code [telephony: Area codes that are services, not places] SAC Store Access Controller [ICL] SAC Strategic Air Command [US military] (see TAC) SADD Students Against Drunk Driving SADL Synchronous Data Link Control [Racal-Vadic] SAG Starlink Advisory Group SAG Street Address Guide SAI S Activity Indicator (in EOC) SAI Serving Area Interface SAINT Symbolic Automatic Integrator SAL Shift Arithmetic Left SALI Standalone Automatic Location Identification SAM Serc Account Manager SAM Serial Access Memory + Sequential Access Method SAM Subsequent Address Message (SS7: in ISUP) SAM Surface to Air Missile SAM Surface-to-Air Missile SAMA Step-by-step Automatic Message Accounting [telephony] SAMMIE Study Aid for Man-Machine IntEractions [Compeda] SAMTO Space And Missile Test Organization SAMTO SpaceAnd Missile Test Organization SANE Signaling Area/Network Code (SS7) SAP Second Audio Program SAP Second Audio Program + Service Access Point [DEC] SAP Service Access Point SAP Symbolic Assembly Program SAPI Service Access Point Identifier SAR Shift Arithmetic Right + Successive Approximation Register SAR Store Address Register SAR Synthetic Aperture Radar SARTS Switched Access Remote Test System SAS Sales Accounting System + Single Audio System SAS Special Air Service SAS Statistical Analysis System SASE Self-Addressed Stamped Envelope SASI Shugart Associates Systems Interface SAT Satellite [Space] SAT Special Access Termination SAT Supervisory Audio Tone .SAV Saved (file name extension) SAVDM Single Application VDM SAW Surface Acoustic Wave SB Science Board [SERC] SB Sound Board SBA Small Business Administration SBA System Buffer Area [GEC] SBB Subtract With Borrow SBC S Bus Interface Circuit PEB2080 SBC Single Board Computer [DEC] SBC Single-Board Computer SBCC Science Board Computing Committee [SERC] SBCS Single-Byte Character Set SBCX SBC extended PEB2081 SBMS Southwestern Bell Mobile Service SBS Satellite Business Systems [IBM] SBS Skyline Business Systems SBUC S Bus Connector SC Scanner Controller SC Secondary Channel SC Sectional Center SC South Carolina SC SubCommittee S&C Skull & Crossbones SCAD Subsonic Cruise Armed Decoy SCADC Standard Central Air Data Computer SCAME SCreen oriented Anti-Misery Editor SCAMP Single-Chip A-series Mainframe Processor SCAN Switched Circuit Automatic Network SCAS Scan String SCAT Stromberg-Carlson Assistance Team SCB Subsystem Control Block [IBM] SCC Serial Communications Controllers SCC Serial Controller Chip SCC Specialized Common Carrier SCC Switching Control Center SCC Synchronous Channel Check [IBM] SCCP Signaling CCP (SS7: Q.71X) SCCS Source Code Control System SCCS Specialized Common Carrier Service SCCS Switching Control Center System SCD Standard Color Display SCE Signal Conversion Equipment SCE Structure Chart Editor SCF Selective Call Forwarding SCF System Control Facility SCI SpaceCraft Incorporated SCIFI SCIence FIction (often used pejoratively of what really isn't) Sci-Fi SCIence FIction (often used pejoratively of what really isn't) SCL Station Clock SCL System Control Language [ICL] SCLK Slave CLK SCM Scramble Coder Multiplexer SCM Small Core Memory SCM Software Configuration Management SCM Subscriber Carrier Module SCO Santa Cruz Operation SCO Santa Cruz Operation (Software Company) SCO Serving Central Office SCOOPS SCheme Object Oriented Programming System SCOPE Simple Communications Programming Enironment + [Hayes] SCOT Stepper Central Office Tester SCOTS Surveilance and Control Of Transmission Systems SCOTS Surveillance & Control Of Transmissions System SCP Save Cursor Position + Subsystem Control Port + System Control Program SCP Service Control Point SCP Signal Control Point SCP Signal Conversion Point SCP System Control Program SCPC Signal Channel Per Carrier SCPD Supplementary Central Pulse Distributor SCR Signaling Configuration Register SCR Silicon Controlled Rectifier .SCR Script (file name extension) SCRC Send Corrected Reference Equivalent SCRN Screen (video display) SCS Stream Control Segment [GEC] SCSI Small Computer Systems Interface SCSI Small Computer Systems Interface SCSS interactive (conversational) statistical system akin to SPSS SCU Selector Control Unit SCUBA Self Contained Underwater Breathing Apparatus SCUBA SelfContained Underwater Breathing Aperatus SCUBA Self-Contained Underwater Breathing Apparatus Scuba Self-Contained Underwater Breathing Apparatus SCUD Subsonic Cruise Unarmed Decoy SCX Specialized Communications eXchange SD Send Data SD Slip Detected SD South Dakota SDA Software Disk Array SDA Source Data Automation SDA System Display Architecture [Digital] SD&D Specific Development & Design SDE Submission/Delivery Entity (X.400) SDF Space Delimited File + Space Delimited Format .SDF Standard Data Format (file name extension) SDI Selective Dissemination of Information SDI Standard Disk Interconnect SDI Stategic Defence Initiative SDI Strategic Defense Initiative [US Government] SDIS Switched Digital Integrated Service SDK Software Developer's Kit [Microsoft] SDL Specification and Description Language SDL Systems Designers Limited SDLC Synchronous Data Link Control [IBM] SDLC Synchronous Data Link Control (protocol) SDLC Synchronous DLC SDM Space Division Multiplex SDM Spool Data Management SDM Sub-rate Data Multiplexer SDN Software Defined Network [AT&T] SDN Software Defined Network [telephony, AT&T] SDNS Secure Data Network Service SDO Staff Duty Officer SDOC Selective Dynamic Overload Controls SDP Service Delivery Point SDP Submission and Delivery Protocol (X.411) SDR Store Data Register SDR Streaming Data Request SDS Switched Data Service SDS Synchronous Data Set SDS Sysops Distribution System SDSC San Diego Supercomputer Center SDSC Synchronous Data Set Controller SD_STB Streaming Data Strobe [IBM] SDT Software Development Tools SDV Shuttle Derived Vehicle [Space] SE South East SE1 Systems Extension 1[MVS enhancement] SE2 Systems Extension 2 [MVS enhancement] SEA Standard Extended Attribute [OS/2] SEAC Standard Eastern Automating Computing (1st transistor based computer) SEAD Suppression of Enemy Air Defenses SEAS Signaling Engineering and Administration System SEATO SouthEast Asia Treaty Organization SEC Security Exchange Commission SEC Signal level behind the Echo Canceller (C/I channel code) SEC Single Error Correction SECAM Sequential Color And Memory SECDED Single Error Correction, Double Error Detection SECNAV SECretary of the NAVy SED Stream EDitor SED Stream Editor SEG Segment SEI Software Engineering Institute (Carnegie Mellon) SEL digital Selector (in TMS) SEL Select SEL SELector SEL Software Engineering Laboratory SEM Scanning Electron Microscope SEM Scanning Electron Microscope + Standard Electronic Module SEP System Error Process [GEC] SER Serial SERC Science & Engineering Research Council SERCNET SERC network of computers SES Service Evaluation System SET Softwave Engineering Technology .SET Driver Set (file name extension) [Lotus 1-2-3] [LDC] .SET Image Settings (file name extension) [Paradox] SETI Search for Extra Terrestrial Intelligence [Space] SEU Smallest Executable Unit SF San Francisco SF Science Fiction; Speculative Fiction SF Service Field SF Sign Flag SF Single Frequency SF Standard Form SF Star Frontiers SF Status Field (SS7) SFB Set next FEBE to zero SFD Sub-File Directory [Pr1me] SFD Superframe Detected (C/I channel code) SFMC Satellite Facility Management Center SFQL Structured Full-text Query Language SFRPG Science Fiction Role Playing Game SFT System Fault Tolerance SFX Sound Effect(s) SG StarGuard SG SubGroup SG SuperGroup SGC Switching Group Control SGDT Store Global Descriptor Table SGEN Signal Generator + System Generator SGEN System GENerator [for SERCnet GEC computers] SGH Select Graphic Rendition (Teletex) SGML Standard Generalized Markup Language SGML Standard Generalized Markup Language SGML Standard Generic Markup Language SGMP Simple Gateway Management Protocol SGR Set Graphics Rendition S/H Sample and Hold SHAPE Supreme Headquarters Allied Powers Europe SHAR SHell ARchiver SHCD Sherlock Holmes Consulting Detective SHELX program for crystal structure determination SHF Super High Frequency (3-30GHz) SHI Select Horizontal Spacing (Teletex) SHL Shift Logical Left SHR Shift Logical Right SHRPG Super Hero Role Playing Game SI Sequenced Information SI Service Indicator SI Shift In (ASCII Control) SI Source Index + System Information SI Staten Island SI Status Indicator SIAM Society for Industrial and Applied Mathematics SIC Silicon Integrated Circuit SICOFI Signal Processing Codec Filter PEB2060 SICOFI2 2 channel SICOFI PEB2260 SID Station Identification [AT&T] + Symbolic Interactive Debugger SID System IDentification SIDES Siemens ISDN Software Development and Evaluation System SIDM SERCnet Inter-Development Meeting SIDT Store Interrupt Descriptor Table SIF Signaling Information Field (SS7) SIG Signaling equipment (in a trunk) SIG Special Interest Group SIG Special Interest Group SIGCAT Special Interest Group for Cd-rom Applications Technology SIGCAT Special Interest Group on CD-ROM Applications + and Technology SIGS Signaling Strobe SIGTIP Special Interest Group on Tools for Interactive Programs [SERC] SIM Simulator SIMD Single Instruction Multiple Data SIMD Single Instruction, Multiple Data SIMD Single Instruction Multiple Data Stream (processor) SIMM Single In-line Memory Module SIMM Single In-line Memory Module SIMM System Integrated Memory Module SIMSCRIPT - general purpose simulation package SIMULA general-purpose simulation package SIMULA Simulation (language) SIN Status Indication Normal Alignment SINE SINE is not EINE SIO Service Information Octet (SS7) SIP Serial Interface Port SIP Single In-line Package SIP Single In-line Package SIPB 5XXX SIPB Modules SIPB 7XXX SIPB Configurations SIPB Siemens ISDN PC User Board SIPMOS Siemens P MOS BUZ... SIPO 6XXX Siemens ISDN PC Software Object Code SIPO Serial In, Parallel Out SIPO Systems Installation Productivity Option [IBM] ? SIPP Single In-line Pin Package SIPS 6XXX Siemens ISDN PC Software Source Code SIPS Satellite Imagery Processing System SIR Software Incident Report [GEC] SIR Symbolic Input Routine [GEC] SIRTF Space Infrared Telescope Facility [Space] SIS Strategic Information System SISC SERCnet Implementors Sub-Committee SISCOM Satellite Information System COMpany SISO Serial In, Serial Out SIT Special Information Tone SIT Special Information Tones SITA Societe Internationale Telecommunications Aeronautiques SITAC Siemens Isolated Thyristor AC SITEST Siemens ISDN Protocol Software Test Tools SIPO6022 SIU Subscriber Line Interface Unit SJ Society of Jesus Skyhook Surface to space "elevator" transportation system [Space] SL Salvage Loss SL Space Launch [Space] SL Subscriber Line SLA Special Libraries Association SLA Special Library Association SLA Subscriber Line Adress SLA Synchronous Line Adapter SLAC Stanford Linear Accelerator Center SLAM Simulation Language for Analogue Modelling [ICL] SLAN Sine Loco, Anno, (vel) Nomine (without place, year, or name) SLAR Side Looking Airborne Radar SLBM Submarine Launched Ballistic Missiles SLC Signaling Link Code (SS7) SLC Space Launch Complex [Space] SLC Subscriber Loop Carrier [telephony] SLD Subscriber Line Data (Bus) SLDC Synchronous Data Link Control SLDT Store Local Descriptor Table SLE Screening Line Editor SLIC Subscriber Line Interface Circuit SLIM Subscriber Line Interface Module SLIP Serial Line Interface Protocol SLIP Serial Line Internet Protocol SLIP Serial Line IP (sometimes SL/IP) (see also PPP) SLIP Symmetric LIst Processor [Fortran sub's for list processing] SLM Subscriber Line Module SLMA SLM Analog SLMD SLM Digital SLMR Silly Little Modem Reader SLOSH Sea, Lake and Overland Surge from Hurricane (program) SLP Super Long Play (VHS VCR) SLS Signaling Link Selection (SS7) SLSI Super Large Scale Integration SLSI Super Large-Scale Integration SM Service Mark SM Service Module SM Set Mode SM Speech Memory SM Switching Module SMA Sergeant Major of the Army SMA Spectrum Manufacturers Association SMA System Monitor Aids [GEC] SMAC Store Multiple Access Controller [ICL] SMAN System MANager [of SERCnet GEC computer] SMAS Supplementary MAin Store SMAS Switched Maintenance Access System SMASF SMAS Frame SMASPU SMAS Power Unit SMB Server Message Block (protocol) [MII] SMC Small Magellanic Cloud (see LMC) SMD Storage Module Device (interface standard for disk drives) SMD Surface Mounted Device SMD Surface Mounted Device SMDF Subscriber Main Distributing Frame SMDI Subscriber Message Desk Interface SMDR Station Message Detail Recording [telephony] SMDR Station Message Detailed Recording SMDS Switched Multi-Megabit Data Service SMDS Switched Multi-megabit Data Service [telephony, networking] SMEGMA Sophisticated Modern Editor with Gloriously Magnificent Abilities SMERSH Abbr. of Russian phrase meaning "Death to the spies." SMF Sub Multi Frame SMF System Management Facility SMF System Manager Facility [Compaq] SMG SuperMasterGroup SMI System Management Interrupts [Intel] SMIF Standard Mechanical Interface SMILS Sonobouy Missile Impact Location System SMILS Sonobuoy Missile Impact Location System SMK Software Migration Kit [Microsoft] SMM Solar Maximum Mission (satellite 1980-1989) SMM System Mangement Mode SMOG System for the Minimal Output of Graphics SMP Symbolic Manipulation Program + Symmetrical Multiprocessor (machine) SMPS Switching Mode Power Supply SMRAM System Management Random Access Memory SMS Service Management System SMSA Standard Metropolitan Statistical Area SMSW Store Machine Status Word SMT Surface-Mount Technology SMTP Simple Mail Transfer Protocol SMTP Simple Mail Transfer Protocol SMTP Simple Message Transfer Protocol SMU System Management Utility SN Science News [periodical] SN Serial Number SN Serial Number SN Super Nova S/N Signal-to-Noise (Ratio) SNA System Network Architecture (IBM network) SNA Systems Network Architecture [IBM] SNADS System Network Architecture Distribution Service SNAFU Situation Normal -- All Fucked Up SNAP Shipboard Non-tactical Automated data Processing program SNCF Societe National des Chemins de Fer (French National Railways) SND Sound SNET Southern New England Telephone SNF Server-Natural Format SNMC SERCnet Network Management Committee SNMP Simple Network Management Protocol SNMP Simple Network Management Protocol [TCP/IP] SNOBOL a string manipulation system SNOBOL StriNg Oriented symbOLic Language SNOBOL String Oriented Symbolic Language (Progamming Language) SNOSC SERCnet Network Operators Sub-Committee SNP Serial Number/Password [Omen Technology] SNR Signal to Noise Ratio SNR Signal-to-Noise Ratio SNS Spallation Neutron Source SO Seller's Option SO Shift Out SO Significant Other SO Space Opera SO Strike Out SOAC Service Order Analysis Control SOAP Symbolic Optimizing Assembler Program SOC Service Oversight Center SOC System On a Chip SOE Standard Operating Environment SOH Service Order History SOH Start of Header SOH Start Of Header, ASCII control character (dec=01,control-A) SOH Start of Heading SOHIO Standard Oil of oHIO [Corporate name] SOL Short on Landing (or, colloquially, Shit Out of Luck) SOL Simulation Oriented Language SOM Start of Message + System Object Model [IBM] SONAR Service Order Negotiation And Retrieval SONAR SOund Detection And Ranging Sonar SOund Detection And Ranging SONDS Small Office Network Data System SONET Synchronous Optical Network [telephony] SOP Standard Operating Procedure SOP Standard Operating Procedures SOS Save Our Souls (International standard distress call, Morse ...---...) SOS Silicon On Sapphire + Standards and Open Systems SOS Silicon On Sapphire [integrated circuit] SOTA State Of The Art SOX Sound Exchange SP (Ger) storage SP Shore Patrol SP Short Play (VHS VCR) SP Signal Point (Switching Office in SS7) SP Signal Processor SP Signaling Point SP Southern Pacific (railroad) [Corporate name] SP Stack Pointer SP Stack Pointer + System Product SP Star Patrol SP Stimulus Protocol SP Systems Product (Release) - releases 1, 2 [MVS enhancement] SPA Software Publishers Association SPA Software Publishers Association SPAC disc SPACe allocator [GEC] SPAG Standards Promotion and Applications Group SPALLOC segment SPace ALLOCator [GEC] SPAN Space Physics Analysis Network SPAN Space Physics and Analysis Network [NASA] (DECnet) SPAN System Performance ANalyzer SPAR Stock Points Adp Replacement SPARC Scalable Processor ARChitecture SPARC Scalable Processor Architecture SPARC Standards, Planning, And Requirements Committee SPAWAR naval SPAce and WARfare command SPC Signaling Poiny Code (SS7) SPC Small Peripheral Controller + Statistical Process Control SPC Software Productivity Consortium SPC Southern Pacific Communications SPC Stored Program Control/led/ler SPCA Society for the Prevention of Cruelty to Animals SPCC Society for the Prevention of Cruelty to Children SPCL Spectrum Cellular Corporation SPCR Serial Port Control Register SPCS Stored Program Control Systems SPEC Systems Performance Evaluation Cooperative SPF Shortest Path First + System Programming Facility SPF Structured Programming Facility [IBM] SPF System Productivity Facility [IBM] SPI Serial Peripheral Interface SPI Service Provider Interface SPICE Simulation Program with Integrated Circuit Emphasis SPIKE Science Planning Intelligent Knowledge-Based + Environment [STScI] SPITBOL Speedy implementation of Snobol [QMCCC] SPL Spooler SPL Systems Programmers Limited .SPL Spell Checker (file name extension) SPNI Society for the Protection of Nature in Israel SPOOL Simultaneous Peripheral Operation On-Line SPOOL Simultaneous Peripheral Operations On Line SPR Systems Product (Release) - releases 1, 2 [MVS enhancement] SP(R) Systems Product (Release) - releases 1, 2 [MVS enhancement] SPS Software Products Scheme [DoI] SPS Solar Power Satellite [Space] SPS Spallation Neutron Source ? SPS Standby Power System SPSS Statistical Package for the Social Sciences SPSS Statistical Package for the Social Sciences SPT Sectors Per Track SPUC/DL Serial Peripheral Unit Controller/Data Link SPUR Systech Pluraxial Unplug Repeater SPX Sequenced Packet Exchange [Novell] SQ Squeezed (files) SQA System Queue Area [MVS] SQD Signal Quality Detector SQL Structured Query Language SQL Structured Query Language [IBM] SQL/DS Structured Query Language / DataSystem [IBM] SQL/DS Structured Query Language/Data System SQRT Square Root SQUID Superconducting QUantum Interference Device SR Shift Register SRA Selective Routing Arrangement SRAM Shadow Random Access Memory + Static Random Access Memory SRAM Short Range Attack Missile SRAM Static RAM SRB Service Request Block [MVS] SRB Solid fuel Rocket Booster SRB Solid Rocket Booster [Space] SRC Science Research Council [now SERC] SRCNET SRC network of computers [now SERCNET] SRD Screen Reader System SRG Short and Ring Ground (test) [telephony] SRI Stanford Research Institute SRM System Resources Routines SRO Sharable and Read Only SRO Standing Room Only SRQ Service Request SRR Serially Reusable Resource SRS Synchrotron Radiation Source SS Special Services SS Stack Segment + Single Sided + Seconds SS7 Signaling System #7 (CCITT) SS7 Signalling System #7 [telephony] SSA Social Security Administration [US Government] SSAS Station Signaling and Announcement Subsystem SSB Single Side Band SSBAM Single-SideBand Amplitude Modulation SSC Special Services Center SSC Standard Speech Circuit PSB4500/-1 SSC Superconducting Super Collider SSCP Subsystem Services Control Point SSDA Synchronous Serial Data Adaptor SSE South-SouthEast SSEC Selective Sequence Electronic Calculator [IBM] SSF Sub Service Field SSFF Showcase Software Factory of the Future SSG Staff SerGeant SSGA System Suppport Gate Array SSI Serial Signal Interface SSI Small Scale Integration SSI Small Scale Integration SSI Space Services Incorporated [Space] SSI Supplemental Security Income SSN Subsystem Number SSO Satellite Switching Office SSP Scientific Subroutine Package SSP Send Single Pulses (C/I channel code for test mode) SSP Service Switching Point SSP Signal Switching Point SSP Sponsor Selective Pricing SSP System Status Panel SSPC SSP Controller SSPRU SSP Relay Unit SSPS Satellite Solar Power Station [Space] SSR Secondary Surveillance Radar SSR Soviet Socialist Republic SSRC Social Science Research Council SST Spread-Spectrum Technology SST System Segment Table [GEC] SSTO Single Stage to Orbit [Space] SSTTSS Space-Space-Time-Time-Space-Space network SSTV Slow Scan TeleVision SSW South-SouthWest ST Self Test request NT (IOM2 Monitor Message) ST Short Ton ST STart ST Subscriber Terminal STA Spanning Tree Algorithm STAF Science Teacher's Authoring Facility STAIRS STorage And Information Retrieval System STARS Software Technology for Adaptable, Reliable Systems STATMUX Statistical Multiplexer STATUS database - infromation and retrieval system STB Strobe STC Serving Test Center STC Set Carry Flag STC Standard Telephones & Cables STC Switching Technical Center STCR Syncron Transfer Control Register STD Sacrae Theologiae Doctor (doctor of sacred theology) STD Set Direction Flag + Standard STD Sexually Transmitted Disease (VD) STD State Transition Diagram STD Subscriber Trunk Dialing [UK and elsewhere.=DDD in USA] STDA StreetTalk Directory Assistance [Banyan] STDAUX Standard Auxillary STDERR Standard Error STDIN Standard Input STDIO.H Standard Input/Output Header [C] STDM Statistical Time Division Multiplexing STDOUT Standard Output STDPRN Standard Printer STE Software Tools Editor ['Software Tools', Kernighan & Plauger] STEP SIDES Static Test of IOS and MF on board (in SITEST) .STF Structured File (file name extension) [Lotus Agenda] STI Set Interrupt Flag STI Software Technology Initiative panel [SERC] STILO Scientific and Technical Intelligence Liaison Office STL St. Louis (airport designation) STM Synchronous Transfer Mode STN Supertwist Nematic STN SuperTwisted Nematic STOL Short TakeOff and Landing STOR STORe service module [GEC] STORY Screening Tool for Report Files (IOS) STOS Store String STP Self Test Pass (IOM2 Monitor Message) STP Shielded Twisted Pair (cable) + Signal Transfer Point STP Signal Transfer Point (SS7) STP Software Through Pictures STP Standard Temperature and Pressure (see NTP) STP Status Transfer Protocol STR Store Task Register + Synchronous Transmitter Receiver STRESS Structural Engineering System Solver (Programming + Language) STRPG Star Trek: The Role-Playing Game STRUDL Structural Design Language (Programming Language) STS 2060 SICOFI software STS Shared Tenant Service STS Space Transportation System (space shuttle) [NASA] STS Space-Time-Space network STS Space-Time-Space switch (TMS-TSI-TMS) STS Steered Tenant Service STScI Space Telescope Science Institute STU 2000 stand alone ISDN user board STU 2040 stand alone MTS user board STU 2050 stand alone PBC user board STU 2060 stand alone SICOF user board STUDIALO - PC Software for STU 2XXX STV Single Transferable Vote STV Space Transfer Vehicle [Space] STX Start of Test STX Start of Text .STY Style (file name extension) [Ventura, Word, WordPerfect] SU Signaling Unit SUB Sub-addressing (I.251) SUB Subroutine + Substitute + Subtract SUB Substitute Character (Teletex) SUERM SU Error Rate Monitor SUM Single-User Minicomputer [SERC] SUM Symantec Utilities for Macintosh SUN Stanford University Network SUN SUN MicroSystems Computer [Brand name] SUNOCO SUN Oil COmpany [Corporate name] SUNY State University of New York .SUP Supplemental Dictionary (file name extension) + [WordPerfect] SUPV IPM route of CHAP [GEC] SURAnet Southeastern Universities Research Association Network SURB SUc Request BLock SUS Single User Systems SUS Suspend (SS7: in ISUP) SUSP Suspend (I.451) SUSSG Single User System Steering Group [SERC] SVA System Variable Area [GEC] SVC SuperVisor Call [MVS] SVC Switched Virtual Circuit SVGA Super Video Graphics Array S-VHS Super VHS SVID System V Interface Definition SVM Service Module SVP SerVice Processor [ICL] SVP Surge Voltage Protector various SVR Service Visit Report [GEC] SVS Select Vertical Spacing (Teletex) SVS Switched Voice Service SW South West SW SuperWorld S/W Software SWA Scheduler Work Area[MVS] SWB SouthWestern Bell SWBT South Western Bell Telephone [Telephony] SWFC Sliding-Window Flow Control SWIFT Society for Worldwide Interbank Financial Communications .SWP Swap (file name extension) SWS Scientific Workstation Support SWURCC South West Universities Regional Computer Centre SX SimpleX signaling SXS Step by Step switching [Telephony] SXS Step by (X) Step SYC SYstem Control SYLK Symbolic Link .SYM Symbols (file name extension) SYMAP SYnagraphic MAPping - produces maps on a lineprinter [Harvard] SYMVU draws perspective views of surfaces on a plotter [Harvard] SYN Synchronous Idle .SYN Synonym (file name extension) SYNC Synchronous SYP Synchronisation Pulse SYS System .SYS System Configuration (file name extension) .SYS System Device Driver (file name extension) SYSGEN SYStem GENeration SYSGEN System Generator SYSLOG System Log SYSMOD System Modification SYSOP System Operator SYSREQ System Request SYSTIME DEC OEM Company T double wire pair T Tip T Traveler T Traveller T- Transportfunction- T1 1.544Mbps [telephony], one of the basic signalling systems 24x64Kb T1FE T1 carrier Front End T1/OS T1 carrier OutState T3 45Mbps (eq 28 T1 channels) [Telephony] T4010 Tektronix 4010, a popular storage-tube type graphics terminal TA Teaching Assistant TA Terminal Adaption TA Terminal Adaptor TA Transfer Allowed TAC Tactical Air Command (see SAC) TAC Technical Assistance Center TAC TEI Assignment Control (IOS) TAC Terminal Access Circuit TAC Terminal Access Controller/Concentrator [ARPAnet/MILNET/DDN] TAC Tso ACcount resource rule sets TACCS Tactical Army Combat service support Computer System TAD Telephone Answering Device TAE Transportable Applications Environment TAL Trans-Atlantic Abort Landing [NASA, Shuttle] TAP Telephone Assistance Plan TAP Teletex Access Protocol (X.430: P5) TAPCIS The Access Program for the CompuServe + Information Service TAR Tape ARchiver TAS Telephone Answering Service TASC Technical Assistance Service Center TASC Telecommunications Alarm Surveillance and Control system TASI Time Assignment Speech Interpolation system TASI Time Assign{ment,ed} Speech Interpolation [Telephony] TASM Turbo Assembler [Borland] TASS Technical, Administrative & Supervisory Section [Trade Union] TAT TransAtlantic Telephone TAU Thousand Astronomical Units [Space] TAXI Transparent Asynchronous Tranceiver Interface TB Terabyte (1,000 gigabytes) TB TuBerculosis T/B Top and Bottom TBA To Be Announced TBBS The Bread Board System (BBS) TBD To Be Determined .TBK Toolbook (file name extension) TBM ampex TeraBit Memory TC Teachers College TC Timing Counter TC Toll Center TC Transaction Capabilities TCA Terminal Controlled Airspace TCAM Telecommunications Access Method [IBM] TCAP Transaction Capabilities Application Part TCAP Transaction Capabilities Applications Port TCAS T-Carrier Administration System TCB Task Control Block [MVS] TCC Trunk Class Code TCG Test Call Generation TCM Time Compression Multiplexer TCM Time Compression Multiplexing TCM Trellis Coded Modulation TCM Trellis-Coded Modulation TCON Terminal CONcentrator [GEC] TCP Transmission Control Protocol [ARPA, DOD, IP] TCP/IP Transmission Control Protocol/Internet Protocol TCP/IP Transmission Control Protocol/Internet Protocol TCR Transient Call Record TCS Terminal Control System [Tektronix] TCSEC Trusted Computer System Evaluation Criteria (orange book) TCT To Challenge Tomorrow TCU Timing Control Unit TD TouchDown TD Transmit Data TD Treasury Department TDAS Traffic Data Administration System TDC Tape Data Controller TDC Telex Destination Code (ISO 7498) TDC Terrestrial Data Circuit TDCC Transportation Data Coordinating Committee TDD Telecommunications Device for Deaf TDE Terminal Display Editor TDE Transition Diagram Editor .TDF Trace Definition File (file name extension) [OS/2] .TDF Typeface Definition File (file name extension) TDI Trusted Database Interpretation TDM Time Division Multiplexing TDM Time Division Multiplexing TDMA Time-Division Multiple-Access TDMS Tape and Disk Management System TDMS Terminal Display Management System TDR Time Domain Reflectometer TDR Time Domain Reflectometry TDRS Tracking and Data Relay Satellite [Space] TDSR Transmitter Data Service Request TDtoDP Tablet Coordinates to Display Coordinates (converting) TDY Temporary DutY TE Terminal Equipment TE Transit Exchange (contains PSF) TE Transverse Electric TE/2 Terminal Emulator/2 [Oberon] TEC Tokyo Electronics Corporation TECO Tape Editor and COrrector TECO Text Editor and COrrector TED Tiny Editor TEDIT GEC editor based on the Cambridge Titan EDITor TEFLON polyTEtraFLuOrethyleNe Teflon polyTEtraFLuOrethyleNe TEHO Tail End Hop Off TEI Terminal Endpoint Identifier TELEKOM (Ger) telecom division of DBP TELENET Public packet switched network [USA] TELEX Teleprinter Exchange TELNET Terminal Access Protocol [ARPA] TELNET virtual terminal protocol TELSAM TELephone Service Attitude Measurement TEML Turbo Editor Macro Language [Borlund] TER Thermal Eclipse Reading [Sony] TERM TERMinal TERMPWR Terminator Power TF (Ger) carrier frequency TFDD Text File Device Driver TFEL Thin-Film Electroluminescent TFLAP T-carrier Fault-Locating Applications Program .TFM Tagged Font Metric (file name extension) TFP Tops Filing Protocol TFS Translucent File System TFS Trunk Forecasting System TFT The Fantasy Trip TFT Thin Film Transistor TFT Thin-Film Transistor (screens) TG Thieves' Guild TGC Terminal Group Controller TGN Trunk Group Number TH Trouble History .THD Thread (file name extension) THIEF THief Isn't Even Fine THIEF This Here Isn't Even Fine THL Trans Hybrid Loss THOR Tandy High-intensity Optical Recording THOR Tandy High-Performance Optical Recording .THS Thesaurus (file name extension) TI Test Indication TI Texas Instruments [corporate name] TI Texas Instruments, Inc. TIA Telephone Information Access TIA Thanks In Advance [net jargon] TIA Thanks In Advance (special to USENET) TIA Transient Ischemic Attack TIC Telecom IC (IOM-Bus) TIC TermInfo Compiler TID Target ID TID Ter In Die (three times a day) TIES Time Independent Escape Sequence .TIF Tagged Image File (filename extension) TIFF Tag Image File Format TIFF Tagged Image File Format TIGA Texas Instruments Graphics Architecture TIGER Topologically Integrated Geographic Encoding + and Referencing TIM TIMe module [GEC] TIM Timing TIOT Task Input/Output Table [IBM] TIP Terminal Interface Processor TIP Terminal Interface Processor [ARPA] ? TIRKS Trunk Integrated Record Keeping System TKO (Ger) telecom regulations TKO Technical Knock Out TL Total Loss TLA Three Letter Acronym TLB Translation Lookaside Buffer TLC Tender Loving Care TLI Transort-Level Interface TLI Transport Layer Interface TLM Trouble Locating Manual TLN Trunk Line Network TLP Transmission Level Point TLTP Trunk Line and Test Panel TLU Table Lookup .TLX Telex (file name extension) TM Tape Mark TM Testmode TM TradeMark TM Trademark TM Transverse Magnetic TM Trasfer Modus TM1 Terminal 1 (IOS) TMA Trunk Module Analog TMA Tycho Magnetic Anomaly (2001) TMA Tycho Magnetic Anomaly [movie 2001] TMAC Treasury department's Multiuser Acquisition Contract TMD Theatre Missile Defense TMD Trunk Module Digital TMDF Trunk Main Distributing Frame TMI Three Mile Island TMIS Telecommunications Management Information System TMMS Telephone Message Management System TMO Telephone Money Order TMP Temporary TMP The Morrow Project TMR Transient Memory Record TMRC Tech Model Railroad Club [MIT] TMRC Transportation Modeling Research Center (TMRC {above} alter ego) TMRS Traffic Measurement and Recording System TMRS Traffic Metering Remote System TMS Time-Multiplexed Switch(ing) TMX Trunk Module with X-interface TN Telephone Number TN Tennessee TN Tone (C/I channel code: wake up signal) TN Transaction Number TN Twisted Nematic TN Twisted Nematic TNC Terminal Node Controller TNC Terminal Node Controller TNC Threaded Neill Concelman (connector) [electronics] (see also BNC) TNDS Total Network Data System TNF Tumor Necrosis Factor [biology, medicine] TNN Trunk Network Number TNOP Total Network Operation Plan TNPC Traffic Network Planning Center TNT TriNitro Toluene TO Telegraph Office TO Turn Over TOD Time Of Day module [GEC] TODS Transactions on Database Systems (ACM) TOF Top Of Form TOMS Transactions on Mathematical Software (ACM) TOOIS Transactions on Office Information Systems (ACM) TOP Technical and Office Protocol TOP Technical Office Protocol TOP Technical/Office Protocol TOPLAS Transactions on Programming Languages and Systems (ACM) TOPQ Top of Queue (quasi SDL) TOPS Timesharing OPerating System TOPS Traffic Operator Position System [telephony] TOPSMP Traffic Operator Position System Multipurpose [telephony] TORES Text ORiented Editing System TOS Transfer Orbit Stage [Space] TOTAL Database management system marketed by Cincom Systems TOW Tube launched, Optically tracked, and Wire guided TP from TP0 and TP4 (ISO/CCITT Transport Services; like TCP) TP Tele-Processing TP Toll Point TP Transaction Processing TP4 Transport Protocol, class 4 [ISO] TPC The Phone Company (from classic movie: _The President's Analyst_) TPC Transaction Processing Performance Council TPI Tracks Per Inch TPI Tracks Per Inch TPL Table Producing Language TPM Transactions Per Minute TPMP Total network data system Performance Measurement Plan TPO Traveling Post Office TPORT Twisted Pair Port Transceiver [AT&T] TPP TetraarylPorPhyrin TPS Technical Publishing Software TPS TeleProcessing Services TPS Transaction Processing System TPW Turbo Pascal for Windows TQM Total Quality Management TR Tech Report [at least LCS (q.v.), maybe others] TR Technical Reference [Bell, telephony] TR Terminal Ready TR Test Register TR Transfer Register T&R two wire phone connection TRADIC Transistorized Airborne Digital Computer (first entirely transistorized computer) TRANSPAC - French public packet switching network TREAT Trouble Report Evaluation Analysis Tool TRG Tip and Ring Ground (test) [telephony] TRI Tone Ringer PSB652x .TRM Terminal (file name extension) TRMTR TRamsMiTteR TROFF Text RunOFF, text formatter TRON The Real-Time Operating System Nucleus TRR Tip-Ring Reverse TRUSIX TRUSted unIX TRW Thompson, Ramo, and Woolridge TS Time Slot TS Top Secret TS Top Secret TS Transport Service TSA Technical Support Alliance TSA Time Slot Assignment TSB Termination Status Block TSB Transport Service Box TSBSP Transport Service Byte Stream Protocol TSC Time SliCer [GEC] TSC Tristate Control TSCPF Time Switch and Call Processor Frame TSCPF Time Switch and Central Processor Frame TSD Total System Design TSI Time Slot Interchanger TSO Time Sharing Option TSO Time Sharing Option [IBM] TSORT Transmission System Optimum Relief Tool TSP Teleprocessing Services Program TSP Test SuPervisor TSP Thrift Savings Plan TSP Time Series Processor - econometric analysis of time series data TSP Time Synchronization Protocol TSP Traffic Service Position TSP TriSodium Phosphate TSPS Traffic Service Position System TSR Terminate and Stay Resident TSR TSR (Fortune 500 Company that manufactures Dungeons & Dragons) TSS Task State Segment + Time Sharing System TSS Tethered Satellite System [Space] TSS Trunk Servicing System TS/SI Top Secret/Sensitive Information TSST Time-Space-Space-Time network TST Time-Space-Time network TST Time-Space-Time switch (TSI-TMS-TSI) TST Traveling-Wave Tube .TST Test (file name extension) TSTN Triple Supertwisted Nematic TSTO Two Stage to Orbit [Space] TSTS Time-Space-Time-Space network TT Trunk Type T&T Tunnels & Trolls TTC Terminating Toll Center .TTF TrueType Font (file name extension) TTFN Tah Tah, For Now TTL Transistor Transistor Logic TTL Transistor-Transistor Logic TTL Transistor-Transistor Logic TTMA Tennessee Tech Microcomputer Association TTP Trunk Test Panel TTS Transaction Tracking System TTS Trunk Time Switch TTTN Tandem Tie Trunk Network TTU Tennessee Technological University TTY Teletype TTY TeleTYpewriter TTYC TTY Controller TUI Text-Based User Interface [WordPerfect] TUNIS Toronto UNIversity System TUP Telephone User Part (SS7: Q.72X) TUR Traffic Usage Recording TUR Trunk Utilization Report .TUT Tutorial (file name extension) TV TeleVision TVA Tennessee Valley Authority TVI Television Interference TW Thieves' World TWA Trans World Airlines [corporate name] TWIMC To Whom It May Concern TWT Traveling Wave Tube TWX TeletypeWriter eXchange TWX Teletypewriter Exchange Service TX Texas TXD Transmitted Data TxSD Transmit Serial Data TXT Text TXT2STF Text To Structured File [Lotus Agenda] u (representing the greek mu) - micro U single wire pair U Universe U- Unnumbered (U-Frames) UA United Artists [corporate name] UA Unnumbered ACK (LAP-D Response) UA User Agent + User Area UA User Agent (X.400) UACPP User Advisory Committee on Particle Physics [SERC] UAE Unrecoverable Application Error UAE User Application Entity or User Agent Entity (X.400) UAI U Activation Indication (C/I channel code) UAR United Arab Republic UAR User Action Routine UART Universal Asynchronous Receiver Transmitter UART Universal Asynchronous Receiver/Transmitter UART Universal Asynchronous Receive/Transmit UBA Unblocking Acknowledgement UBA UniBus Adapter [DEC] UBC Universal Bibliographic Control UBC University of British Columbia UBL Unblocling (SS7: in ISUP) UCAR University Corporation for Atmospheric Research UCB Unit Control Block [IBM, DEC] UCB University of California at Berkeley UCD Uniform Call Distributor [telephony] UCD University of California at Davis UCI University of California at Irvine UCL Universal Communications Language UCL University College London UCLA Univeristy of California at Los Angeles UCLCC University College London Computer Centre UCR University of California at Riverside UCS Universal Character Set UCSB University of California at Santa Barbara UCSC University of California at Santa Cruz UCSD University of California at San Diego UCSF University of California at San Francisco UDB Unified DataBase UDC User Defined Commands UDF User Defined Functions UDLC Universal DLC UDN (Cambridge) University Data Network UDP User Datagram Protocol UDP User Datagram Protocol UDT Unidata (SS7: in SCCP) UDTS Unidata Servive (SS7: in SCCP) UEC User Environment Component UFD User File Directory [DEC, Pr1me] UFO Unidentified Flying Object UG User Group UGC University Grants Committee UH Upper Half UHF Ultra High Frequency (300-3000MHz) UI Unix International UI Unnumbered Information (LAP-D Command) UIC U-Interface Unit UIC User Identification Code [DEC] UID User ID UID User Identifier UIG User Interface Group [RAL] UIM User Interface Module (I/O routine "chapter") [GEC] UIMS User Interface Management System UITP Universal Information Transport Plan UK United Kingdom U(K0) (Ger) U0 echo cancellation Interface UKAEA United Kingdom Atomic Energy Authority UKCIS United Kingdom Chemical Information Service UKIRT United Kingdom Infra-Red Telescope UL Underwriters Laboratory UL Upload ULA Uncommitted Logic Array ULA Uncommitted Logic Array ULANA Unified Local-Area Network Architecture ULC User Liason Committee [RAL] ULCC University of London Computer Centre ULCU User Level Control/Command Unit ULN Universal Link Negotiation ULSI Ultra Large Scale Integration UMB Upper Memory Block [LIM/AST] UMIST University of Manchester Institute of Science & Technology UMOC Ugliest Man On Campus [MIT] UMRCC University of Manchester Regional Computer Centre UMT Universal Military Training UN United Nations UNC Universal Naming Convention UNCOL Universal Computed Oriented Language UNCTAD United Nations Commission for Trade And Development UNESCO United Nations Educational, Scientific, & Cultural Organization UNIBUS equip't interface bus used on DEC PDP-11 + some VAX computers UNICEF United Nations International Children's Emergency Fund (now UN Child. Fund) UNICEF United Nations International Children's Emergency Fund (now United Nat. Child. Fund) UNICOM Universal Integrated Communication (System) UNICOS Universal Compiler FORTRAN compatible UNICS UNiplex Information Computer Services UNIDO United Nations Industrial Development Organisation UNISTAR UNIversal Single call Telecommunications Answering & Repair UNIVAC UNIVersal Automatic Calculators [the Company] UNIVAC Universal Automatic Computer UNIX (AT&T Bell Laboratories Operating System) UNIX Not an acronym at all.=Was a joke on MIT's MULTICS. UNIX Not an acronym at all. Was a joke on MIT's MULTICS. UNIX pun on MULTICS [Bell Laboratories] UNMA Unified Network Management Architecture UNMA Unified Network Management Architecture [AT&T] UNO United Nations Organization UOA U Interface Only Activation (in EOC) UP Union Pacific (railroad) [Corporate name] UP UniProcessor UP User Part U(P0) (Ger) U0 burst mode Interface UPC Universal Product Code UPC Universal Product Code UPI United Press International [Corporate name] UPL User Program Language UPM User Profile Management [IBM] UPS Uninterruptible Power Supply UPS Uninterruptible Power Supply + Uninterruptible Power System UPS United Parcel Service [Corporate name] UR University of Rochester UREP Unix RSCS Emulation Protocol (protocol) US Unit Separator US United States (of America) U/S Unservicable USA Union of South Africa USA United States Army USA United States of America USAF United States Air Force USAFA United States Air Force Academy (in Colorado Springs) USAM User Spool Access Method USAN University Satellite Network USART Universal Synchronous-Asynchronous Reciever/Transmitter USART Universal Synchrounous/Asynchrounous Receiver/Transmitter USB Upper Side Band USC University of Southern California USC Univesity of Southern California USCD mispelling of uCsd? USCG United States Coast Guard USDA United States Department of Agriculture USERID User Identification USES United States Employment Service USFL United States Football League USGS United States Geological Survey USIA United States Information Agency USITA United States Independent Telephone Association USM United States Mail USMC United States Marine Corps USN United States Navy USO United Service Organizations USO Universal Service Order USO Unix Software Operation USOC Universal Service Order Code USP United States Pharmacopeia USP Universal Sampling Plan USPS United States Postal Service USQ Unsqueezed (files) USR US Robotics (corporation) USR User Service Routines USR User-to-User Information (SS7: in ISUP) USRT Universal Synchronous Receiver/Transmitter USRT Universal Synchronous Receive/Transmit USS United States Ship USSA User Supported Software Association (United Kingdom) USSR Union of Soviet Socialist Republics USSS User Services and Systems Support USW Und So Weiter (German: and so on) USWP User Specification Working Party UT Universal Time UT University of Tennessee UT University of Texas UT User Terminal UT UTah UTC Coordinated Universal Time UTC Coordinated Universal Time UTC Unable to Comply Ack (in EOC) UTC Unacknowledged (Unnumbered) Information Transfer Control (IOS) UTC Universal Coordinated Time UTI Universal Text Interchange UTM Universal Transaction Monitor UTnet University of Texas Network UTP Unshielded Twisted-Pair (cable) UTS Universal Timesharing System [Xerox Sigma] UUCICO Unix to Unix Copy Incoming Copy Outgoing UUCP Unix to Unix Copy Program UUCP Unix-System to Unix-System Copy UUCP Unix-to-Unix CoPy UUCP UNIX-to-UNIX Copy Program UUCP Unix-To-Unix Copy Program UUG Unix User Group UUI User-To-User Information [AT&T] UUS User-to-User Signaling (I.257 A) UV UltraViolet UV Ultraviolet UW UnderWriter UW Univ of Wisconsin V24 CCITT standard for terminal/MODEM interconnection VA Veterans Administration VA Virginia VA Virtual Address VAC Vacuumschmelze (produces cores and transformers) VAD Value Added Dealer VADD Value Added Disk Driver VADDR Virtual device ADDRess VAL Value + Voice Application Language .VAL Validity Checks (file name extension) [Paradox] VAM Virtual Access Method VAN Value Added Network VAN Value Added Network (e.g. Tymnet, Telenet, etc) VANS Value Added Network Service VANS Value-Added Network Services VAP Value Added Process VAP Value Added Processes VAP Videotext Access Point VAR Value Added Remarketer (reseller) VAR Value Added Remarketers VAR Value Added Reseller + Value Added Retailer + Variable VASI Visual Approach Slope Indicator VAT Value Added Tax VAX Virtual Address eXtended VAX Virtual Address eXtension [DEC] VAXBI VAX Bus Interconnect VAX/VMS Virtual Address Extension/Virtual Memory System [DEC] VB Variable Block VC Virtual Call VC Virtual Circuit VCB Virtual Circuit Bearer VCD Virtual Communications Driver VCM Voice Coil Motor VCO Voltage Controlled Oscillator VCPI Virtual Control Program Interface VCR Video Cassette Recorder VCR VideoCassette Recorder VCS Virtual Circuit System VCU Virginia Commonwealth University VD Venereal Disease (see also STD) VDD Virtual Device Driver VDDM Virtual Device Driver Manager VDE Video Display Editor VDFM Virtual Disk File Manager VDI Virtual Device Interface VDISK Virtual Disk VDM Vienna Development Method VDM Virtual Device Metafile VDM Virtual DOS Machine [IBM] VDS Virtual DMA Services VDT Video Display Terminal VDT Video Display Terminal VDU Video Display Unit + Visual Display Unit VDU Visual Display Unit VEGA Video-7 Enhanced Graphics Adapter [Video-7, Inc.] VEMM Virtual Expanded Memory Manager VER Verify VERR Verify Read Access VERW Verify Write Access VESA Video Electronics Standards Association VF Video Frequency VF Voice Frequency VFAC Verified and Forced Account Codes VFD Vacuum Fluorescent Display VFN Vendor Feature Node VFO Variable Frequency Oscillator VFU Vertical Format Unit [Dataproducts lineprinter] VFW Veterans of Foreign Wars VFW Volunteer Fire Department VFY VeriFY VG Very Good VG Vicar-General VGA Video Graphics Array VGA Video Graphics Array VGC Video Graphics Controller VGF Voice Grade Facility VHDL Very High Scale IC Description Language (DOD) VHDL Vhsic Hardware Description Language VHF Very High Frequency (30-300MHz) VHS Very High Speed + Virtual Host Storage VHS Video Home System (VCR) VHSIC Very High Speed Integrated Circuit VHSIC Very High Speed Integrated Circuit VI VIsual editor VIABLE Vertical Installation Automation BaseLinE VILE VI Like Emacs VIM Vendor Independent Messaging (interface) VINE Vine Is Not Emacs VINES Virtual Network Operating System [Banyan] VINES VIrtual NEtwork Software VIO Video Input/Output + Virtual Input/Output VIO Virtual Input/Output VIP Variable Information Processing VIP Very Important Person VIPER Verifiable Integrated Processor for + Enhanced Reliability VIS Video Information System [Tandy] + Voice Information System VISTA Volunteers In Service To America VISUAL 3D modelling package [Shape Data, Camb.] VITA Vme International Trade Association VIU Voiceband Interface Unit VJ Video Jockey VL (Ger) connecting cable VL Vulgar Latin VLA Very Large Array radio telescope in Arizona or New Mexico VL-BUS Vesa Local-Bus [VESA] VLF Very Low Frequency VLF Very Low Frequency (3-30KHz) VLIW Very Long Instruction Word VLIW Very Long Instruction Word (machine) VLSI Very Large Scale Integration VLSI Very Large Scale Integration VLSI Very Large-Scale Integrated circuitry VLSIPS Very Large Scale Immobilized Polymer Synthesis VLT Variable List Table VM Virtual Machine VM Virtual Machine [IBM] VM Virtual Memory VMB Virtual Machine Boot VMCF Virtual Machine Communications Facility VM/CMS Virtual Machine/Conversational Monitor System VME Vitual Machine Environment [ICL] VMM Virtual Memory Manager VMM Virtual Memory Manager VMNCP VM and NCP combined VMOS Vertical metal oxide semiconductor VMOS Vertical Metal Oxide Semiconductor (V-MOS) (see MOS) VMOS Vertical MOS VMR Vertical Market Reseller VMR Volt-Meter Reverse VMRS Voice Message Relay System VMS Vertical Motion Simulator VMS Virtual Memory System + Voice Message System VMS Virtual Memory System + Voice Message System VMS Virtual Memory System [DEC operating system] VMS Voice Mail System VMS Voice Management System VM/SP Virtual Machine/System Product VMT Virtual Memory Technique VNET synonym for RSCS [IBM] VNET Virtual NETworking Facility VNF Virtual Network Feature VNL Via Net Loss plan VNLF Via Net Loss Factor VOA Voice Of America VODAS Voice Over Data Access Station VOIS Voice-Operated Information System VOL Volume VOM Volt Ohm Meter VOQ Visiting Officer's Quarters VOS Verbal Operating System VP Virtual Peripheral [GEC] VPD Virtual Printer Device VPDS Virtual Private Data Service [MCI] VPI&SU Virginia Polytechnic Institute and State University VPN Virtual Private Network VPT Virtual Private Network VR Voltage Regulator V(R) Receive Sequence Counter VRAM Video Random Access Memory VRC Vertical Redundancy Character VRC Vertical Redundancy Check VRC Visible Record Computer VRM Virtual Resource Manager VROOMM Virtual Real-time Object Oriented + Memory Manager [Borlund] VRS Voice Response System .VRS WordPerfect Graphics Driver (file name extension) VRU Voice Response Unit VS Virtual Storage VS Virtual Storage [IBM] V(S) Transmit Sequence Counter VSAM Virtual Storage Access Method VSAM Virtual Storage Access Method [IBM] VSAT Very Small Aperture Terminal VSAT Very Small Aperture Terminal, satellite dish VSB Vestigial SideBand modulation VSE Virtual Storage Extended VSE Virtual Storage Extended VSF Vertical Scanning Frequency VSLI Very Large Scale Integration VSM Virtual Storage Management VSM Virtual Storage Manager VSOP Very Special Old Pale VSOS Virtual Storage Operating System VSP (Ger) full frame storage VSPC Virtual Storage Personal Computing [IBM] VSR Voice Storage and Retrieval VSS Voice Storage System VSSP Voice Switch Signaling Point VSt (Ger) exchange unit VSX X/open Verification Suite VSYNC Vertical Sync VT Vertical Tabulator VT Virtual Terminal VT100 DEC video terminal with special features for screen editing VT52 popular DEC video terminal with some special features VTAM Virtual Telecom Access Method VTAM Virtual Telecommunications Access Method [IBM] VTAM Virtual Telecommunications Access Method [IBM] VTI Virtual Terminal Interface VTOC Volume Table Of Contents [IBM] VTOL Vertical TakeOff and Landing VTP Virtual Terminal Protocol VTR Video Tape Recorder VTR VideoTape Recorder VTS Video Teleconferencing System VUI Video User Interface VUP Vax Unit of Performance V&V Villains & Vigilantes VVSS Vertical Volute Spring Suspension W West W Width W/ With WA Washington WA Western Australia WAC Womens Air Corps WADS Wide Area Data Service WAIS Wide Area Information Server/Service WAITS Wide Area Information Transfer System WAN Wide Area Network WAN Wide Area Network WARC World Administrative Conference WATS Wide Area Telecommunications Service WATS Wide Area Telephone Service .WAV Waveform Audio (file name extension) WB Water Ballast WB WayBill WBC White Blood Cells WC Water Closet WC Wire Center WC Without Charge WC Word Count WCB Way Control Block [GEC] WCI Write Controller Interface (IOM2 Monitor Command) WCPC Wire Center Planning Center WCS Writable Control Store [PERQ, and others] WCTU Women's Christian Temperance Union WDFHP recursive high pass filter + decimation filter WDFLP recursive low pass filter + decimation filter WDM Wavelength Division Multiplex WDT Watch Dog Timer WECo Western Electric Company [AT&T manufacturing arm] WELL Whole Earth Lectronic Link (BBS) WFW Windows For Workgroups [Microsoft] WG Working Group WGS Work Group System WH WarHammer WHATIS an acronym/abbreviation expander WHAT you IS using! WHBL World Home Bible League WHCA White House Communications Agency [US Government] WHO World Health Organization WI Wisconsin WINWORD Word For Windows [Microsoft] WIP Work In Progress WIS WWMCCS Information System WISE WordPerfect Information System Environment WITS Washington Interagency Telecommunications System .WK1 Worksheet (file name extension) [Lotus 1-2-3] [LDC] .WKB Workbook (file name extension) [WordPerfect] .WKE Worksheet (file name extension) [Lotus 1-2-3] [LDC] .WKQ Spreadsheet (file name extension) [BORQU] .WKS Worksheet (file name extension) [Lotus 1-2-3] [LDC] .WKZ Compressed Spreadsheet (file name extension) [BORQU] WM Work Manager .WMF Windows Metafile (file name extension) [Microsoft] WMSCR Weather Message Switching Center Replacement WNIC Wide-Area Network Interface Co-Processor WNIM Wide-Area Network Interface Module W/O Without WOPR War Operations Planned Response (from "Wargames" movie) WORM Write Once, Read Many WORM Write Once, Read Many time WOSA Windows Open Services Architecture [Microsoft] WOW Worlds of Wonder WP Word Processing WP WordPerfect + Word Processing + Write Protected WP Working Paper WP Working Profile [GEC] WPB Waste Paper Basket .WPG Graphics (file name extension) [WordPerfect] WPHD Write-Protect Hard Disk .WPK Keyboard (file name extension) [WordPerfect] WPM Words Per Minute .WPM Macro (file name extension) [WordPerfect] WPS Windows Printing System [Microsoft] + Workplace Shell [OS2] .WQ! Compressed Spreadsheet (file name extension) [BORPQU] .WQ1 Spreadsheet (file name extension) [BORPQU] WS WordStar + Workstation WSI Wafer Scale Integration WSW West-SouthWest WT Write Through WTO Write-To-Operator WU Washington University WU Western Union WV West Virginia WW World War WWI World War I WWII World War II WWMCCS World-Wide Military Command and Control System WY Wyoming WYSBYGI What You See Before You Get It WYSIWIS What You See Is What I See WYSIWYG What You See Is What You Get WYSIWYG What You See Is What You Get X21 CCITT recommendation for DCE-to-DTE interface X25 CCITT recommendation for packet-mode DTE to packet-mode DCE X28 CCITT recommendation for start/stop DTE to PAD X29 CCITT recommendation for packet-mode DTE to PAD X3 CCITT recommendation defining the PAD X3.9 ANS Fortran standard X3.9:1966 = Fortran IV, X3.9:1978 = Fortran X3J3 ANSI Fortran standard committee XA Extended Architecture + Extended Attribute XA eXtended Architecture as in MVS/XA XAD Transmit Adress XAPIA X.400 Application Program Interface Association XB X-Bar XBAR X-BAR XBM eXtended Basic Mode [ICL] XBT X-Bar Tandem XCF eXperimental Computing Facility XCHG Exchange XCMD External Command XCOPY Extended Copy XD without Dividend XDR External Data Representation XDR eXternal Data Representation XENIX Microsoft implementation of Unix XEROX Company which manufactures office equipment (especially photocopiers) XFCN External Function XFE X-Front End XFER Transfer XFIFO Transmit FIFO XGA Extended Graphics Array [IBM] XID Exchange Identification (LAP-D Command/Response) XID Exchange Identifier XINU XINU Is Not UNIX XIOS Extended Input/Output System XL eXtra Large XLAT Translate XMIT Transmit XMM Extended Memory Manager [LIM/AST] XMS Extended Memory Specification [LIM/AST] XMS eXtended Multiprocessor operating System XMTR transMiTteR (the X is for trans) XNS Xerox Network Service XNS Xerox Network System (protocol) [Xerox] XO eXecutive Officer XOFF ISO character DC3 ("control S") used to pause data transfer XOFF Transmission Off (DC1) XOFF Transmitter Off XON ISO character DC1 ("control Q") used to restart data transfer XON Transmission On (DC3) XON Transmitter On XON/XOFF a data transfer flow control software protocol on some computers XOR Exclusive OR (Also EOR) XOR eXclusive OR (logical function) XPL Cross Reference Protocol Listing (PCT) XPORT Transport XSECT cross SECTion XSMD Extended Storage Module Drive (interface) XTAB survey analysis package XTAL Crystal XTAL crysTAL (another version of x for crys, see XMTR) XTCLK External Transmit Clock XUI X-windows User Interface XXX combination of X3/X28/X29 protocols YA Yet Another YACC Yet Another Compiler Compiler YACC Yet Another Compiler-Compiler [Unix] YAM Yet Another Modem [Omen Technology] YB YearBook YMCA Young Mens Christian Association YMHA Young Mens Hebrew Association YOB Year Of Birth YOP Youth Opportunities Programme YP Yellow Pages YRS Ysgarth Rules System YST Yukon Standard Time YT Yukon Territory YT Yukon Time YTD Year To Date YTS Youth Training Scheme YWCA Young Womens Christian Association YWHA Young Womens Hebrew Association Z Zenith Z Zero ZB Zero Beat ZBR Zone Bit Recording ZCAV Zoned Constant Angular Velocity Z-CAV Zoned Constant Angular Velocity ZCS Zero Code Suppression ZDS Zenith Data Systems ZETA Zero Energy Thermonuclear Apparatus ZETA Zero Energy Thermonuclear Assembly ZGS Zero Gradient Synchrotron ZI Zonal Index ZIF Zero-Insertion Force (socket) ZIP Zigzag In-Line Package + Zone Improvement Plan (ZIPcode) ZIP Zone Improvement Plan (post office code) ZIP Zone Improvement Plan (US post office code) .ZIP Compressed File (file name extension) [PKWare] ZK barrage balloon (navy symbol) ZMRI Zinc Metals Research Institute .ZOO Compressed File (file name extension) [Dhesi] ZPG Zero Population Growth ZPRSN Zurich Provisional Relative Sunspot Number ZSL Zero Slot LAN ZSP (Ger) intermediate (buffer) storage ZST Zone Standard Time ZT Zone Time ZWEI Zwei Was Eine Initially ZWR (Ger) intermediate regenerator ZZF (Ger) central office for approvals in telecommunications (DBP) ZZK (Ger) central signaling channel