Here are some abbriviations in the computer world

abbriv. text A-D Analog to Digital AA Author's Alteration AA Auto Answer ABEND Abnormal End ABR Aivailable Bit Rate AC Alternating Current ACB Access method Control Block ACDS Active Control Data Set ACE Asynchronous Communications Element ACF Advanced Communication Facility ACIA Asynchronous Communications Interface Adapter ACK Acknowledge ACS Asynchronous Connection Server ACS Automatic Class Selection ACSE Application Control Service Element ACT Application Control Table ACU Automatic Calling Unit ADC Analog Digital Converter ADDMD Administrative Directory Management Domain ADMD Administrative Management Domain ADSL Asymetric Digital Subscriber Loop AE Applications Engineer AEA Activity End Acknowledge AEI Application Entity Invocation AF Application Framework AFP Advanced Function Printing AFS Andrew File System AGS Advanced Graphics System AI Artificial Intelligence AIU Application Interface Unit AIX Advanced Interactive eXecutive AIX Alternate IndeX ALGOL ALGOrithmic Language ALS Application Layer Structure ALS Automatic Line Switching ALT Application Load Table ALU Arithmetic-Logic Unit ALU Arithmetic and Logic Unit AM Amplitude Modulated AM Access Method AMD Advanced Micro Devices, Inc. AMH Automated Material Handling AMI American Megatrends Inc. AMI Alternate Mark Inversion AMIS Audio Messaging Interchange Specification AMS Access Method Services ANSI American National Standards Institute AOCE Apple Open Collaboration Environment AOW Asian and Oceanic Workshop for open systems AP Access Point AP Automation Protocol APA All Points Addressable APDU Application Protocol Data Unit API Applications Programming Interface APIA API Association APL A Programming Language APPC Advanced Program-to-Program Communication APPI Advanced Peer-to-Peer Internetwork(ing) APPN Advanced Peer-to-Peer Network(ing) APS Advanced Production System AR Attention Routine ARP Address Resolution Protocol ARPA Advanced Research Projects Agency ARPANET Advanced Research Projects Agency Network ARU Audio Response Unit AS Activity Start AS Autonomous System ASC Accredited Standards Committee ASCII American Standard Code for Information Interchange ASE Application Service Element ASIC Application Specific Integrated Circuit ASN Abstract Syntax Notation ASN.1 Abstract Syntax Notation One ASO Application Service Object ASPI Advanced SCSI Programming Interface ASR Automatic Speech Recognition ASTs Asynchronous System Traps AT Advanced Technology ATA AT bus Attachment ATDM Asynchronous Time Division Multiplexing ATM Asynchronous Transfer Mode ATM Adobe Type Manager ATM Automatic Teller Machine ATSF Alert Transport Service Facility AU Access Unit AUI Attached Unit Interface AVR Automatic Volume Recognition AWG American Wire Gauge B8ZS Binary Eight Zero Substitution BABT British Approvals Board for Telecommunications BAL Business Application Language BAM Basic Access Methods BAS Basic Activity Subset BASIC Beginners All-Purpose Symbolic Instruktion Code BBS Bulletin Board System BCC Block Check Character BCD Binary Coded Decimal BCF Bridge Control Facility BCPL Basic Combined Programming Language BCS Basic Catalog Structure BCS Basic Combined Subset BDAM Basic Direct Access Method BDR Basic Density Range BE Back End BEL Bell BER Bit Error Rate BES Bursty Errored Seconds BG BackGround BHT Branch History Table BiCMOS Bipolar Complementary Metal-Oxide Semiconductor BIOS Basic Input/Output System BIS Business Information System BISYNC Binary Synchronous Communication BIT Binary Digit BITNIC Bitnet Network Information Center BLOB Binary Large Object BMIC Bus Master Interface Controller BMP BitMaP BMS Basic Mapping Support BNC Bayonet Nut Connector BNN Boundary Network Node BOC Bell Operating Companies BOT Begin Of Tape BP Base Pointer BPAM Basic Partitioned Access Method BPI Bytes Per Inch BPS Bites Per Second BPS/bps Bytes/bits Per Second BRA Basic Rate Access BRI Basic Rate Interface BS Backspace / British Standard BSA Basic Service Area BSAM Basic Sequential Access Method BSC Binary Synchronous Communications BSC Binary Synchronous Communication BSD Berkeley Standard Distribution BSDS BootStrap Data Set BSI British Standards Institute BSS Basic Synchronous Subset BTA-ES Basic Teleprocessing Access Method - Extended Storage BTAC Branch Target Address Cache BTAM Basic Teleprocessing Access Method BTU British Thermal Units BYP Bypass CA Collision Avoidance CA... Computer Aided ... CAA Computer Aided Architecture CAD Computer Aided Design CADD Computer Aided Design and Drafting CADIS Computer Aided Design Interactive System CAE Computer Assisted Education, Computer Aided Engineering = CAD + CAP + CAQ CAH Computer Aided Handling CAI Computer Aided Instruction = CIM + CAO CAISE Computer Aided Integrated Software Engineering CALS Computer Aided Acquisition and Logistic Support CAM Computer Aided Manufacturing CAM Content Addressable Memory CAM Common Access Method (Committee) CAM Computer Aided Manufacturing / Content Adressable Memory CAMAC Computer Automated MeAsurement Control CAN Cancel CAO Computer Aided Office CAP Computer Aided Planning / Computer Aided Publishing CAPP Computer Aided Production Planning CAPPC Computer Aided Production Planning and Control CAPSC Computer Aided Production Scheduling and Control CAQ Computer Aided Quality Assurance CAR Computer Aided Roboting CAR Computer Assisted Radiology CAS Column Address Strobe CAS Computer Aided Selling CASE Common Application Service Elements CASE Computer Aided Software-Engineering CAT Computer Aided Testing CATV CAble TeleVision CBEMA Computer and Business Equipment Manufacturers' Association CBR Constant Bit Rate CBT Computer Based Training CBX Common Branch eXtender CCD Charge Coupled Device CCD Charge-Coupled Device CCETT Centre Commun d'Etudes de Telediffusion et Telecommunications CCIR International Radio Consultative Committee CCITT Consultative Committee of International Telephony and Telegraphy CCITT Comite Consultatif International Telegraphique et Telephonique CCR Committment, Concurrency and Recovery CCS Common Communication Support CCTA Central Computer and Telecommunications Agency CCU Communication Control Unit CCW Channel Command Word CD Carrier Detect CD Collision Detection CD Compact Disk CDB Command Descriptor Block CDDA Compact Disk - Digital Audio CDDI Copper Distributed Data Interface CDDI Copper Data Distribution Interface CDG Compact Disk - Graphic CDI Compact Disk Interactive CDMA Code Division Multiple Access CDPD Cellular Digital Packet Data CDR Copy Density Range CDROM Compact Disk Read Only Memory CDROM Compact Disk ROM CDTV Commodore Total Vision CDXA Copmact Disk eXtended Architecture CEC Commission of European Communities CEFIC Conseil Européen des Federations de l'Industrie Chimique CELP Code Excited Linear Prediction CEN Comité Européen de Normalisation CENELEC Comité Européen de Normalisation Electrotechnique CEO Comprehensive Electronic Office CEPT Conference Européenne des Administrations des Postes et des Telecommunications CF Carry Flag CF Control Function CGA Color Graphics Adaptor CGA Colour Graphics Adapter CGI Common Gateway Interface CGI Computer Graphics Interface CGM Computer Graphics Metafile CHAP Challenge-Handshake Authentication Protocol CHL-I CHanneL Interface CHPID CHannel Path IDentifier CHS Cylinder Head Sector CI Computer Interconnect CI Control Interval CIAM Computer Integrated and Automated Manufacturing CIB Computer Integrated Business CICS Customer Information Control System CID Configuration, Installation and Distribution CIF Cells In Frames CIF Common Intermediate Format CIF Computer Integrated Factory = CIO + CIM CIM Computer Input by Microfilm CIM Computer Integrated Manufacturing = PPS + CAE + CAM CIO Computer Integrated Office CIR Committed Information Rate CIS Card Information Structure CISC Complex Instruction-Set Computer CISC Complex (Complete) Instruction Set Computer CIT Computer Integrated Telephony CIV Conversation Verb Interface CKD Count Key Data CL Core Image Library CLA Carry Lookahead Adder CLIM Compaq/Lotus/Intel/Microsoft CLNS Connectionless Network Service CM/2 Communication Manager / 2 CMC Communication Management Configuration CMEA Council for Mutual Economic Assistance CMIP Common Management Information Protocol CMIS Common Management Information Service CMOS Complementary Metal-Oxide Semiconductor CMOS Complimentary Metal Oxide Semiconductor CMOT Common Management Information Protocol (CMOT) Over TCP/IP CMR Communications Resource Manager CMS Conversational Monitor System CMYK Cyan, Magenta, Yellow, Black CNC Computerized Numerical Control CNLP Connectionless Network Protocol CNM Communication Network Management CNMA Communication Network for Manufacturing Applications CNR Carrier-to-Noise-Ratio COBOL COmmon Business Oriented Language COCOM Coordinating Comittee on Multilateral Export Controls CODASYL COnference on DAta SYstems Languages Codec Coder/Decoder COM Common Object Model COM Computer Output on Microfilm COMAL COMmon Algorithmic Language COMREG Communication Region CONS Connection-Oriented Network Service CORBA Common Object Request Broker Architecture COS Corporation for Open Systems COSINE Cooperation for OSI Networking in Europe COSS Cross Operating System Service CP Control Program CP-SVR Control Point to Server CP/M Control Program / Monitor CP/M Control Program/Monitor (for Microcomputer) CPE Customer Premises Equipment CPI Clocks Per Instruction CPI Characters Per Inch CPI Common Programming Interface CPI Computer to PABX Interface CPIC Common Programming Interface for Communications CPL Current Privilege Level CPR Computerized Patient Record CPS Characters Per Second CPU Central Processing Unit CPU Central Processing Unit CQFP Ceramic Quad-FlatPack CR Carriage Return CR Carriage Return CR Communication Region CRC Cyclical redundancy check CRC Cyclic Redundancy Checking CRJE Conversational Remote Job Entry CRQ Command Response Queue CRS Computer Reservation System CRS Configuration Report Server CRT Cathode Ray Tube CS Chip Select CS Communications Server CSA Common System Area CSC Cross System Consistency CSDN Circuit Switched Data Network CSECT Control Section CSI Consolidated Software Inventory CSLIP Compressed SLIP CSMA Carrier Sense Multiple-Access CSMA/CA Carrier Sense Multiple Access with Collision Avoidance CSMA/CD Carrier Sense Multiple-Access with Collision Detect CSMA/CD Carrier Sense Multiple Access with Collision Detection CSP Control Sequence Prefix CSP Cross System Product CSPDN Circuit Switched Public Data Network CSR Command Status Register CST Computer Supported Telephony CSU Channel Service Unit CSU/DSU Channel Service Unit / Data Service Unit CT Continuous Tone CT2T Continuous Tone To Tape CTC Channel To Channel CTC CICS To CICS CTS Clear To Send CTS Conformance Test System CTS-WAN Conformance Testing Services for WAN CU Control Unit CUA Common User Access CUT Control Unit Terminal CVOL Control VOLume CWS Coalition for Working Systems D/A Digital/Analog DA Desk Accessory DAC Digital Analog Converter DAC Dual Attachment Concentrator DAI Distributed Artificial Intelligence DAM Direct Access Method DAP Directory Access Protocol DAP Document Application Profile DARPA Defense Advanced Research Projects Agency DAS Dual Attachment Station DASD Direct Access Storage Device DAT Digital Audio Tape DAT Dynamic Address Translation DB Database DBCS Double Byte Character Set DBMS DataBase Management System DBRT Directed Beam Refresh Terminal DC Direct Current DC Data Cartridge DC Data Communication DCA Document Content Architecture DCAF Distributed Console Access Facility DCB Data Control Block DCB Disk Coprocessor Board DCC Diskette Controller Chip DCD Data Carrier Detect DCE Data Circuit-terminating Equipment DCE Data Circuit terminating Equipment DCE Data Communications Equipment DCE Distributed Computing Environment DCI Display Control Interface DCL Digital Command Language DCS Desktop Color Separation DCT Destination Control Table DCT Discrete Cosine Transform DD Double Density DD Data Definition DDCMP Digital Data Communications Message Protocol DDCS Distributed Database Connecion Services/2 DDE Dynamic Data Exchange DDES Digital Data Exchange Specifications DDK Driver Development Kit DDL Data Definition Language DDL Document Description Language DDM Distributed Data Management DDN Defense Data Network DDP Distributed Data Processing DDS Dataphone Digital Service DDS Decision Support System DEC Digital Equipment Corporation DECT Digital European Cordless Telephone DECUS Digital Equipment Computer Users Society DEL Delete DES Data Encryption Standard DES Data Encription Standard DF Direction Flag DFC Distributed Coordination Function DFDSS Data Facility Data Set Services DFHSM Data Facility Hierarchical Storage Manager DFP Data Facility Product DFR Document Filing and Retrival DFS Distributed File Service DFSMS Data Facility Storage Management Subsystem DFSORT Data Facility Sort DFT Distributed Function Terminal DFWMAC Distributed Foundation Wireless Media Access Control DHCP Dynamic Host Configuration Protocol DIA Document Interchange Architecture DIB Data Input Bus DIB Device Independent Bitmap DID Direct Inward Dial DIFS Distributed coordination function InterFrame Space DIN Deutsche Industrie Norm DIP Dual-In-line Package DIP Dual Inline Package DIS Draft International Standard DISSOS Distributed Office Support System DIT Directory Information Tree DL Data Length DL Directory Listing DL/1 Data Language 1 DLBL Disk Label DLCI Data Linc Connection Identifier DLE Data Link Escape DLL Dynamic Link Library DLS Device Level Selection DLSE Device Level Selection Enhanced DLSw Data Link Switching DLUR Dependent LU Requester DLUR/S Dependent LU Requester / Server DLUS Dependent LU Server DMA Direct Memory Access DMCI Direct Memory Communications Interface DMD Directory Management Domain DMI Digital Multiplexed Interface DML Data(base) Manipulation Language DMNL Direct Multi Network Link DMP Dot Matrix Printer DN Distinguished Name DNA Digital Network Architecture DNS Domain Name Server DOC Display Operator Console DOE Distributed Objects Everywhere DOMF Distributed Object Management Facility DOS Disk Operating System DOS Declaration Of Support DOS/VS Disk Operating System / Virtual Storage DOS/VSE Disk Operating System / Virtual Storage Extended DP Draft Proposal DPA Document Printing Application DPE Data Parity Error DPF Data Private Facility DPI Dots Per Inch DPL Descriptor Privilege Level DPMS Display Power Management Signaling DPS Dynamic Path Selection DPSK Differential Phase Shift Keying DQDB Distributed Queue Dual Bus DRAM Dynamic Random Access Memory DRQ Data ReQuest DS Double Sided DS Digit Select DS Directory System DSA Directory System Agent DSA Distributed Systems Architecture DSA Dynamic Storage Area DSF Device Support Facility DSL Direct Swift Link DSN DataSetName DSN Distributed Systems Network DSNL Direct Swift Network Link DSOM Distributed System Object Model DSP Digital Signal Processor DSP Directory System Protocol DSR Data Set Ready DSSI Digital Storage Systems Interconnect DSU Digital Service Unit DTAM Document Transfer, Access and Manipulation DTC Data Terminal Controller DTE Data Terminating Equipment DTE Data Terminal Equipment DTI Department of Trade and Industry (UK) DTMF Dual-Tone MultiFrequency DTP DeskTop Publishing DTR Data Terminal Ready DU Data Unit DUA Directory User Agent DUN Dispatch Unit Number DVI Digital Video Interface DVST Direct View Bistable Storage E1 2,048 Mbps E3 34 Mbps EARN European Academic and Research Network EBAM Electronic Beam-Addressable Memory EBCD Extended Binary Coded Decimal EBCDIC Extended Binary Coded Decimal Interchange Code ECC Error Correction Code ECC Error Checking and Correction ECE Economic Commission for Europe ECF Enhanced Connectivity Facility ECITC European Committee fo IT Testing and Certification ECKD Extended Count-Key Data ECL Emitter-Coupled Logic ECMA European Computer Manufacturers Association ECO Engineering Change Order ECTUA European Counsil for Telecommunications Users Association ECU EISA Configuration Utility EDC Enterprise Database Connectivity EDF Execution Diagnostic Facility EDG Electronic Dot Generation EDI Electronic Data Interchange EDICON EDI Community for the Construction Industry (UK) EDIF Electronic Design Interchange Format EDIFACT Electronic Data Interchange For Administration, Commerce and Transport EDIM Electronic Data Interchange Message EDIMS EDI Messaging System EDM Engineering Data Management EDR Early Device Release EEMA European Electronic Mail Association EEPROM Electrically Erasable Programmable Read-Only Memory EFT Electronic Funds Transfer EGA Enhanced Graphics Adaptor EGA Enhanced Graphics Adapter EGP Exterior Gateway Protocol EHLLAPI Emulator High Level Language Applications Programming Interface EIA Electronic Industries Association EIB Execute Interface Block EIP Execute Interface Program EISA Enhanced Industry Standard Architecture EISA Extended Industry Standard Architecture EIT Encoding Information Type EIUF European ISDN User Forum ELAN European LAN ELAN Extended LAN ELAN Emulated LAN EM End of Medium EMA Enterprise Management Architecture EMF Electro-Magnetic Force EMI Electro-Magnetic Interference EMS Expanded Memory Specification EMUG European MAP Users Group EN European Norme ENE Enterprise Network Event ENP Enable Presentation ENQ Enquiry EO Eight Ones EOB End of Block EOC End of Cylinder EOF End of File EOJ End of Job EOL End Of Line EOP End of Procedure EOS Electrical Overstress EOT End of Transmission EOV End of Volume EP Emulation Program EPDE Electronic Product Data Exchange EPOW Emergency Power Off Warning EPROM Erasable Programmable Read-Only Memory EPROM Eraseable Programable Read Only Memory EPS Encapsulated Postscript EPSF Encapsulated Postscript Format ER Entity Relationship ERDS Error Recording Data Set EREP Environmental Record Editing and Printing program ES Errored Second ESA Extended Service Area ESC Escape ESCON Enterprise System Connection Architecture ESD Electro-Static Discharge ESD Electronic Software Distribution ESD External Symbol Dictionary ESDI Enhanced Small Devices Interface ESDI Enhanced Small Device Interface ESDS Entry Sequenced Data Set ESF Extended SuperFrame ESPRIT European Strategic Programme for Research and development in Information Technology ESQA Extended System Queue Area ETB End of Transmission Block ETCOM European Testing and Certification for Office and Manufacturing protocols ETS European Telecommunication Standard ETSI European Telecommunication Standards Institute ETX End of Text EUnet European Unix Network EUUG European Unix User Group EVI EVent Information EWOS European Workshop for Open Systems EXCP EXecute Channel Program EZ Excessive Zeros F/STP Foil STP FAST Federation Against Software Theft FAT File Allocation Table FBA Fix Block Architecture FBA Fixed Blocked ANSI-defined printer control characters FBM Fix Block Modus FC File Control FCB Format Control Buffer FCC Federal Communications Commission FCP File Control Program FCS Frame-Check Sequence FCT File Control Table FDD Fixed Disk Drive (or Floppy Disk Drive) FDD Fixed Disk Drive FDDI Fiber Distributed Data Interface FDM Frequency Division Multiplexing FDX Full-Duplex Transmission FE Front End FEAL Fast Data Encipherment Algorithm FEP Front End Processor FEP Front-End Processor FF Form Feed FF Formfeed FIFO First-In First-Out FIFO First In, First Out FILO First-In Last-Out (same as LIFO) FIPS Federal Information Processing Standard FLOPS Floating-point operations per second FM Frequency Modulation FOB Form Overlay Buffer FOND Font family descriptor FORTRAN FORmula TRANslator FPGA Field Programmable Gate Array FPU Floating Point Unit FRAD Frame Relay Access Device FROM Factory ROM FRU Field-Replaceable Unit FRU Field Replaceable Unit FS Field Separator FS File Separator FSF Free Software Foundation FSK Frequency Shifty Keying FSK Frequency Shift Keying FT Fault Tolerant FTAM File Transfer and Access Method FTP File Transfer Program FTP File Transfer Protocol FTP Foil Twisted Pair FTTC Fibre To The Curb FTTH Fibre To The Home FTTP Fibre To The Building FUP Funktionsplan GAL Global Address List GAS Gallium Arsenide GATF Graphic Arts Technical Foundation GB GigaByte GCR Group Coded Recording GDG Generation Data Group GDT Global Descriptor Table GDTR Global Descriptor Table Register GE Graphic Escape GETVIS GET VIrtual Storage GFLOPS Billions (10^9) of FLOating Point Operations Per Second ("GigaFlops") GIF Graphics Interchange Format GIS Generalized Information System GIX Global Internet Exchange GKS Graphical Kernel System GML Generalized Markup Language GNU Gnu's Not Unix GOSIP Government OSI Profile GP General Protection GPIB General-Purpose Interface Bus GRS Global Resource Serialization GS Group Separator GTF Generalized Trace Facility GUI Graphical User Interface GUIP Graphical User Interface for Blind people GUUG German Unix User Group H&J Hyphenation and Justification HA Home Address HADA High Availability Disk Array HCL Hue, Chroma, and Luminance HD High Density HDA Head-Disk Assembl HDBV Host Data Base View HDD Hard Disk Drive HDLC High Level Data Link Communications HDSL High-bit rate Digital Subscriber Loop HDTV High Definition TV HDX Half-Duplex Transmission HE High End (system) HFS Hierarchical File System HGC Hercules Graphics Card HIC Host Interface Computer HLL High Level Language HLS Hue-Lightness-Saturation HPCL Hewlett-Packard Control Language HPFS High Performance File System HPGL Hewlett-Packard Graphical Language HPR High Performance Routing HR Horizontal Rule HS Helical Scan HSB Hue-saturation-brightness HSELAN High Speed ELAN HSI Hue-Saturation-Intensity HSLAN High Speed LAN HSSI High Speed Serial Interface HSV Hue-Saturation-Value HT Horizontal Tab HTML Hypertext Markup Language HTTP Hypertext Transfer Protocol Hz Hertz I-Net Intranet I/O Input/Output IA5 International Alphabet Five IAB Internet Activities Board IBM International Business Machines Corp. IC Integrated Circuit ICEM Integrated Computer Engineering and Manufacturing ID Identifier IDA Indirect Data Addressing IDA Intelligent Drive Array IDC Insulation Displacement Connector IDE Integrated Device Electronics IDE Integrated Drive Electronics IDEA International Data Encryption Algorithm IDL Interfacce Definition Language IDT Interrupt Descriptor Table IEC InterExchange Carrier IEEE Institute of Electrical and Electronic Engineers IETF Internet Engineering Task Force IF Interrupt Flag IFF Interchange File Format IFIP International Federation of Information Processing IFS Interchange File Separator IFS InterFrame Space IGES Initial Graphics Exchange Specification IGMP Internet Group Membership Protocol IGS Interchange Group Separator II Interactive Interface IISP Interim Interswitch Signaling Protocol IKT Informatione- und Kommunikationstechnik ILC InterLanguage Communication IML Initial Microcode Load IMP Interface Message Processor IMPL Initial Microprogram Load IMR Interrupt Mask Registers IMS Information Management System IMS/VS Information Management System / Virtual Storage INP Inhibit Presentation INT INTerrupt IOC ISDN Ordering Code IOCP Input/Output Configuration Program IOCS Input/Output Control System IOGEN Input/Output device GENeration IOPL Input/Output Privilege Level IOS Input/Output Supervisor IP Internet Protocol IPC InterProcess Communication IPL Initial Program Load IPM InterPersonal Message IPSE Integrated Project Support Environment IR Index Return IRC Internet Relay Chat IRDS Information Resource Dictionary System IRQ Interrupt ReQuest IRS Interchange Recors Separator IS Information System IS Intermediate System IS International Standard ISA Industry Standard Architecture ISAM Indexed Sequential Access Method ISDN Integrated Services Digital Network ISFMS Indexed Sequential File Management System ISMF Interactive Storage Management Facility ISO International Standards Organization ISO International Standardization Organisation ISO IEC ISO International Electrotechnical Commitee ISODE ISO Development Environment ISP Internet Service Provider ISPF Interactive System Produvtivity Facility ISPF/PDF ISPF Program Development Facility ISR Information Storage and Retrieval IT Indent Tab ITB Intermediate Transmission Block ITRC Information Technology Requirements Council ITU International Comunication Union (ehem. CCITT) ITV Interactive TeleVision IUS Interchange Unit Separator IWS Intelligent WorkStation JCC Job Control Command JCL Job Control Language JCS Job Control Statement JCT JES Control Table JCT Journal Control Table JECL Job Entry Control Language JEIDA Japan Electronics Industry Development Association JES Job Entry Subsystem JFS Journaled File System JPEG Joint Photographic Experts Group K Kilobyte KB Kilo Byte kHz KiloHertz KIPS Kilo Instructions per second KL Key Length KOPS Kilo Operations per second KSDS Key Sequenced Data Set kVA KiloVolt-Amps KVA KiloVolt Ampere LAN Local Area Network LAPM Link Access Procedure M LAPS LAN Adapter Protocol Support Program LBA Linear Block Array LBL Label LCD Liquid Crystal Display LCS Lotus Communication Server LDMF Librarian Disc Master File LDS Linear Data Set LDT Local Descriptor Table LE Low End (system) LEC Local Exchange Carrier LED Light Emitting Diode LF Line Feed LF Linefeed LIC Line Interface Computer LIFO Last In, First Out LILO Last In, Last Out LIM Lotus/Intel/Microsoft Expanded Memory Manager Specification LIM-EMS Lotus Intel Microsoft EMS LIOCS Logical Input/Output Control System LISP List Programming LLC2 Logical Link Control Layer 2 LOC Lines Of Code LOS Local Operator System LPI Lines Per Inch LRC Longitudinal Redundancy Checking LRU Least-Recently Used LRU Least Recently Used LSB/lsb Least Significant Byte/bit LSD Least Significant Digit LSI Large Scale Integration LSI Large Scale Integration -> VLSI LU Logical Unit LUB Logical Unit Block LUN Logical Unit Number LUT Look Up Table LVT Light Valve Technology LW Line Work LZW Lempel-Ziv-Welch MAC Media Access Control MAN Metropolitan Area Network MAP Maintenance Analysis Procedure MAP Manufacturing Automation Protocol MAPI Messaging Applications Programming Interface MB MegaByte MB/Mb Mega Bytes/bits MBCS Multiple Byte Character Set MBPS MegaBits Per Second MBR Master Boot Record MCA Micro Channel Architecture MCBF Mean Cycles Between Failures MCCOI Multimedia Communications Community of Interest MCGA Multi-Color Graphics Array MCGA MultiColour Graphics Array MCI Media Control Interface MCM Multi-Chip Module MD Management Domain MD5 Message Digest 5 MDA Monochrome Display Adapter MEB Memory Expansion Board MFA Modify Field Attribute MFC Microsoft Foundation Classes MFKS Multifunktionales Konferenzsystem MFLOPS Millions of FLOating Point Operations per Second ("MegaFlops") MFLOPS Million Floating-Point Operations Per Second MFM Modified Frequency Modulated MFM Modified Frequency Modulation MFV Multi File Volume MFWS MultiFunction WorkStation MGA Monochrome Graphic Adapter MHS Message Handling System MHz MegaHertz MI Multiple Inheritance MIB Management Information Database MICR Magnetic Ink Character Recognition MICR Magnetic Ink Character Reader MIDI Musical Instrument Data Interface MIDI Musical Instrument Digital Interface MIMD Multiple-Instruction Multiple-Data MIME Multipurpose Internet Mail Extensions MIPS Millions of Instructions per Second MISC Minimum Instruction Set Computer -> CISC, RISC MISD Multiple-Instruction Single Data MLPPP MultiLink PPP MMDF Multi-Channel Memorandum Distribution Facility MMFS Manufacturing Manage Format Standard MMU Memory Management Unit MNP Microcom Network Protocol MODEM MOdulator / DEModulator MODEM MOdulator/DEModulator MOPS Millions of Operations Per Second MOPS Mega Operations per second MOS Metal-Oxide Semiconductor MOTIS Message-Oriented Text Interchange Systems MP MultiProcessor MP Multiprocessing MPC Multimedia PC MPEG Motion Picture Experts Group MPOA MultiProtocol Over Asynchronous transfer mode MPP Massively Parallel Processor MPSD MultiPath Storage Director MPX multiplex MS Message Store MS-DOS Microsoft Disk Operating System MSA Metropolitan Statistical Area MSB/msb Most Significant Byte/bit MSD Most Significant Digit MSDOS Microsoft Disk Operating System MSG Message MSI Medium Scale Integration MSM MultiSession Monitor MSW Machine Status Word MTA Message Transfer Agent MTBF Mean Time Between Failure MTBF MeanTime Between Failures MTDA Mean Time Data Availability MTS Message Transfer System MUD Multi-User Dungeon MUMPS Massachusetts General Hospital Utility Multi-Programmings System MUMPS Multi-User Multi-ProgrammingSystem MVS Multiple Virtual System MVS/ESA Multiple Virtual System / Extended System Architecture MVS/XA Multiple Virtual System / Extended Architecture MVSCP MVS Configuration Program N/C No-Connect NAC Network Adapter Card NAK Negative Acknowledgement NAP Network Access Point NAT Network Address Translator NAU Network Addressable Unit NBS National Bureau of Standards NBS Numeric BackSpace NC Numeric Control NCCF Network Communication Control Facility NCP Network Control Processor NCP Network Control Program NCP/VS Network Control Program/Virtual Storage NDIS Network Driver Interface Specification NEMA National Electrical Manufacturers Association NetSP Network Security Program NFNT New font numbering table NFS Network File System NFU Not-Frequently Used NHRP Next Hop Routing Protocol NIC Network Interface Card NIST National Institute for Standards and Technology NJE Network Job Entry NL New Line NLQ Near Letter Quality NLT Nucleus Load Table NMI Non-Maskable Interrupt NMI NonMaskable Interrupt NMOS Negatively doped Metal-Oxide Semiconductor NOP No OPeration NRU Not-Recently Used NSA National Security Agency NSC1 Network Systems Cypher One NSF National Science Foundation NSP Numeric Space NSS NATURAL Security-System NT Network Termination NTS/2 Network Transport Services/2 NTSC National Television System Committee NUI Network User Identification NUL Null NUMA Non-Uniform Memory Access NVOD Near Video On Demand NVRAM NonVolatile Random Access Memory NVS NonVolatile Storage O/R Originator / Recipient OC3 155 Mbit/s OCR Optical Character Recognition OCX OLE Control Extension ODA Open Document Architecture ODI Open Datalink Interface ODSI Open Directory Service Interfaces OEM Original Equipment Manufacturer OI Object Interface OLE Object Linking and Embedding OLTEP On-Line Test Executive Program OLTP On-Line Transaction Processing OMG Object Management Group OMR Optical Mark Recognition OO Objektorientierung OOA Objektorientierte Analyse OODBMS Object Oriented DBMS OOP Objektorientierte Programmierung OOPL Object Oriented Programming Language OOPS Object Oriented Programming System OP Operator Panel OPI Open Prepress Interface ORB Object Request Broker OS Operating System OS/2 Operating System/2 OSA Office Systems Architecture OSA Open System Architecture OSF Open Software Foundation OSI Open Systems Interconnect OSI Open Systems Interconnection OSI/RM OSI Reference Model OSNS Open Systems Network Support OSPF Open Shortest Path First OSTC Open System Testing Consortium OTPROM One Time Programable ROM OWL Object Windows Library PABX Private Automatic Branch Exchange PAD Packet Assembly Disassembly PAL Phase Alternating Line PAL Programmable Array Logic PAL/PLA Programmable Array Logic (Logic Array) PAM Partitioned Access Method PAP Password Authentication Protocol PB Push Button PBX Private Branch eXtender PBX Private Branch Exchange PC Personal Computer, Program Counter PC Personal Computer PC Personal Computing PC Program Control PCB Printed Circuit Board PCB Program Control Block PCI Peripheral Component Interconnect PCI Peripheral Component Interface PCI Program Controlled Interuption PCIL Private Core Image Library PCL Printer Control Language PCM Pulse Code Modulation PCM Plug Compatible Manufacturers PCMCIA Personal Computer Memory Card International Association PCN Personal Communication Network PCP Program Control Program PCS Personal Communication Services PCT Private Communication Technology PCT Program Control Table PD Public Domain PDA Personal Digital Assistant PDAD Proposed Draft Addendum PDAU Physical Data Access Unit PDF Program Development Facility PDL Page Description Language PDO Portable Distributed Objects PDS Partitioned Data Set PDS Premise Distribution System PDS Processor Direct Slot PDU Protocol Data Unit PDX Printer Description Extension PE Processor Element PE Printer's error PE Protection Enabled PEARL Processor and Experiment Automation Realtime Language PEM Privacy Enhanced Mail PEP Partitioned Emulation Program PER Program Event Recording PF Parity Flag PFF Page Fault Frequency PFK Program Function Key(board) PFM Printer Font Metric PGA Pin Grid Array PGA Professional graphics adapter PGP Pretty Good Privacy PIB Program Information Block PIC Programmable Interrupt Controller PIFS Point InterFrame Space PIM Personal Information Management PIN Personal Identification Number PIO Programmed Input/Output PIOCS Physical Input/Output Control System PL Procedure Library PL/1 Programming Language 1 PL1 Programming Language 1 PLCC Plastic Leaded Chip Carrier PLL Phase Locked Loop PLPA Pageable Link Pack Area PLT Program List Table PLU Primary Logical Unit PM Preventive Maintenance PMMU Paged memory management unit PMOS Positively doped Metal-Oxide Semiconductor PMS Pantone Matching System PMS Project Management System PMT Photomechanical Transfer (photostat) PMT Photomultiplier Tube PNNI Private Network-to-Network Interface POC Program-Operator Communication POP Point Of Presence POP Post Office Protocol POSIX Portable Operating System Interface for UNIX POST Power On Self Test POTS Plain Old Telephone System POWER Priority Output Writer, Execution processors and input Readers PP Presentation Position PPD PostScript Printer Description PPM Pages Per Minute PPP Point-to-Point Protocol PPS Produktionsplanung und -steuerung PPT Processing Program Table PPTP Point-to-Point Tunneling Protocol PPV Pay Per View PQFP Plastic Quad-FlatPack PRDMD Private Directory Management Domain PRL Private Relocatable Library PRMD Private Management Domain PROM Programmable Read-Only Memory PROM Programable Read Only Memory PSB Program Specification Block PSDN Packet Swiched Data Network PSRAM Pseudo SRAM PSSL Private Source Statement Library PSTN Public Switched Telephone Network PSW Program Status Word PTE Page Table Entry PTF Program Temporary Fix PTR PoinTeR PU Physical Unit PUB Physical Unit Block PVC Permanent Virtual Circuit PVP Packet Video Processor PWB Printed Wire Board PWS Programmable WorkStation QAM Quadrature Amplitude Modulation QBE Query By Example QCIF Quater Common Intermediate Format QFP Quad-FlatPack QIC Quarter Inch Cartridge QIC Quarter-Inch Cartridge QSAM Queued Sequential Access Method QTAM Queued Teleprocessing Access Method R0 Record zero RACF Resource Access Control Facility RAID Redundant Arrays of Inexpensive Disks RAID Redundant Array of Inexpensive Disks RAID Redundant Array of Independent Disks RAM Random Access Memory RAMDAC Random Access Memory Digital to Analog Converter RAS Row Address Strobe RBA Relative Byte Adresse RC Robot Control RCA Radio Corporation of America RCC Routing Control Center RCP Remote Communication Processor RDA Remote Data Access RDBMS Relational DataBase Management System RDN Relative Distinguished Name RES Restore RF Resume Flag RFC Request For Comments RFF Required Form Feed RFI Radio Frequency Interference RGB Red Green Blue RGM Red, Green, Blue (Monitor) RI Ring Indicator RIFF Resource Interchange File Format RIP Raster Image Processor RIP Router Information Protocol RISC Reduced Instruction-Set Computer RISC Reduced Instruction Set Computer RJE Remote Job Entry RL Relocatable Library RLD Relocation Dictionary RLE Run Length Encoded file RLL Run Length Limited RMF Resource Management Facility RMM Read Mostly Memory (same as EPROM) RMS Root Mean Squared RMW Read Modify Write RNL Required New Line ROM Read-Only Memory ROM Read Only Memory RPC Remote Procedure Call RPG Report Program Generator RPL Requestor's Privilege Level RPL Research Programming Language RPM Rotations Per Minute RPM Revolutions Per Minute RPS Rotational Position Sensing RPT Repeat RRDS Relative Record Data Set RRED Right Reading Emulsion Down RREU Right Reading Emulsion Up RS Record Separator RSP Required Space RSVP Resource reservation Protocol RTC Real Time Clock RTCP Realtime Transport Control Protocol RTF Rich Text Format RTM/SF Realtime Monitor / Systems Facility RTP Realtime Transport Protocol RTS Request To Send RTSE Reliable Transfer Service Element RWSI Remote Workstation Interface S.W.I.F.T. Society for Worldwide Interbank Financial Telecommunication S/STP Shielded STP SA Set Attribute SAA Storage Accounting Area SAA System Application Architecture SAM Sequential Access Memory SAM Sequential Access Method SAP Service Access Point SAP Service Advertising Protocol SAR Segmentation And Reassembly SASI Shugart Associates Standard Interface SBCS Single Byte Character Set SBS Subscript SC Storage Control SCA Shared Control Array SCCS Source Code Control System SCDS Source Control Data Set SCI Scalable Coherent Interconnect SCODL Scanned Conversion Object Description Language SCP Storage Control Program SCP System Control Program SCRAM Static Column Random Access Memory SCSI Small Computer Systems Interface SD Single Density SDK Software Development Kit SDL System Directory List SDLC Synchronous Data Link Control SDLC Synchronous Data Link Control SDSF System Display and Search Facility SE Systems Engineer SE Software Entwicklung SE System Engineer SECAM Sequential Couleur a'Memorie SEL Select SET Software-Engineering-Technology SF Sign Flag SF Support Facility SFA Salesforce Automation SFBI Shared Frame Buffer Interconnect SFE Start Field Extended SFT System Fault Tolerance SFTP Shielded Foil Twisted Pair SGML Standard Generalized Markup Language SHTTP Secure HTTP SHY Syllable Hyphen SI Shift In SI Single Inheritance SI Standard Interface SIFS Short InterFrame Space SIFT Stanford Information Filtering Tool SIG Special Interest Group SIM Service Information Message SIMD Single-Instruction Multiple-Data SIMM Single Inline Memory Module SIMM Single In-line Memory Module SIPP Single Inline Pinned Package SIRDS Single Image Random Dot Stereogram SISD Single-Instruction Single-Data SIT System Initialization Table SL Source Statement Library SLD Structured Logic Design SLED Single Large Expensive Disk SLIP Serial Line Internet Protocol SLR Service Level Reporter SLU Secondary Logical Unit SM Set Mode SMD Surface Mount Device SMDS Switched Multimegabit Data Service SMF System Management Facility SML MVS Storage Management Library SMS Storage Management Subsystem SMT Surface Mount Technology SMTP Simple Mail Transfer Protocol SNA System Network Architecture SNADS SNA Distribution Services SNMP Simple Network Management Protocol SNOBOL String Oriented Symbolic Language SNR Signal to Noise Ratio SNT Sign-On Table SO Shift Out SO/SOL Small OutLine SOD Service On Demand SOH Start Of Heading SOIC Small Outline Integrated Circuit SOM System Object Model SOS Start Of Significance SP Space SPA Software Publishers Association SPARC Scalar Processor ARChitecture SPDU Session Protocol Data Unit SPM System Performance Monitor/2 SPOOL Simultaneous Peripheral Operation On Line SPOOL Simultaneous Peripheral Operations On Line SPP Scalable Parallel Processing SPS SpeicherProgrammierbare Steuerung SPS Superscript SPT Sectors Per Track SPU Single Processor Unit SQL Structured Query Language SQL/DS Structured Query Language / Data System SRAM Static Random Access Memory SRT System Recovery Table SRU Shared Resource Unit SS Single Sided SS Stack Segment SSCP System Service Control Point SSID SubSystem IDentifier SSL Secure Socket Layer STDM Synchronous Time Division Multiplexing STM Synchronous Transfer Mode STN Super Twisted Nematic STP Shielded Twisted Pair STT Secure Transaction Technology STU Streaming Tape Unit STX Start of Text SUB Substitute SV Storage Violation SVA Shared Virtual Area SVC Supervisor Call SVC Switched Virtual Circuit SVGA Super Video Graphics Array SVGA Super-VGA SW Switch SWOP Specifications for Web Offset Printing SYN Synchronous Idle SYSOP System Operator T1 1.544 Mbit/s T3 45 Mbit/s TARGA Truevision Advanced Raster Graphics Adapter TB TeraByte TC Terminal Control TCA Task Control Area TCAM Telecommunications Access Method TCB Task Control Block TCM Trellis Code Modulation TCM Thermal Conduction Module TCO Triple Capacity Option TCP Terminal Control Program TCP/IP Transmission Control Protocol/Internet Protocol TCT Terminal Control Table TCTTE Terminal Control Table Terminal Entry TCU Transmission Control Unit TD Transient Data TDIA Transient Data Input Area TDM Time Division Multiplexing TDM Time-Division Multiplexing TDOA Transient Data Output Area TDP Transient Data Program TEO Technical Electronic Office TF Trap Flag TI Texas Instruments TIA Telecomm. Industry Assocation TIFF Tag Image File Format TIOA Terminal Input/Output Area TLB Translation-Lookaside Buffer TLB Translation Lookaside Buffer TLBL Tape Label TMO Thermo-Magneto-Optic technology TNEF Transport-Neutral Encapsulation Format TOC Table Of Contents TOP Technical Office Protocol TPDU Transport Protocol Data Unit TPF Transaction Processing Facility TPI Tracks Per Inch TPM Third-Party Maintenance TPS Transactions Per Second TRN Transparent TS Telecommunication System TS Temporary Storage TSIOA Temporary Storage Input/Output Area TSO Time Sharing Option TSP Temporary Storage Program TSR Terminate and Stay Resident TTA Teletex Attachment (Teletexzusatz) TTL Transistor-Transistor Logic TTL Transistor Transistor Logic TTR Track Record TUV Technischer Ueberwachuags Verein TWA Transaction Work Area TWA Two-Way Alternate TWS Two-Way Simultaneous TX Telex TXT Text UA User Agent UART Universal Asynchronous Receiver/Transmitter UBR Undefined Bit Rate UBS Unit Backspace UCB Unit Control Block UCR Undercolor removal UCS Universal Character Set UCSB Universal Character Set Buffer UCW Unit Control Word UDP User Datagram Protocol UMB Upper Memory Block UNC Universal Naming Convention UPC Universal Product Code UPS Uninterruptible Power Supply UPSI User Program Switch Indicator UR Unit Record URL Uniform Resource Locator US Unit Separator USART Universal Synchronous/Asynchronous Receiver/Transmitter USL Unix System Labs USM UnSharp Masking USRT Universal Synchronous Receiver/Transmitter USV Unterbrechungsfreie StromVersorgung UTP Unshielded Twisted Pair UUCP Unix to Unix Copy Program UUCP Unix-to-Unix-Copy-Program VAN Value Added Network VAP Value Added Process VAR Value Added Reseller VAST Virtual Archive Storage Technology VB Visual Basic VBA Visual Basic for Applications VBN Vermitteltes Breitbandnetz VBR Variable Bit Rate VC Virtual Circuit VCNA Vtam Communication Network Application VCR Video Cassette Recorder VDAC Video Digital Analog Converter VDI Video Display Interface VDT Video Display Terminal VDU Visual Display Unit VERONICA Very Easy Rodent-Oriented Netwide Index to Computerized Archives VESA Video Enhanced Standards Association VGA Video Graphics Array VGC Video Graphics Controller VGM Video Graphics Monitor VHDSL Very High-bit rate Digital Subscriber Loop VHLL Very High-Level Language VHS Video Home System VIO Virtual Input/Output VLB VESA Local Bus VLIW Very Long Instruction Word VLSI Very Large Scale Integration VM Virtual Memory VM Virtual Machine VM/SP Virtual Machine / System Product VME Versa Module Eurocard VMMAP VM Monitor Analysis Program VMOS Vertical MOS VMPPF VM Performance Planning Facility VMPRF VM Performance Reporting Facility VMS Virtual Management System VOD Video On Demand VPD Vital Product Data VR Virtual Reality VRAM Video Random Access Memory VRAM Video RAM VRC Vertical Redundancy Checking VS Virtual Storage VSAM Virtual Storage Access Method VSAT Very Small Aperture Terminal VSM Virtual Storage Management VSN Volume Serial Number VT Vertical Tab VTAM Virtual Telecommunications Access Method VTOC Volume Table of Contents VTP Virtual Terminal Protocol VTR Video Tape Recorder VTX VideoTeXt VVDS VSAM Volume Data Set W3 World Wide Web W4WG Windows for Workgroups WAIS Wide Area Information Service WAN Wide Area Network WATS Wide Area Telephone Service WATS Wide Area Telecommunications Service WD Western Digital WHAT Wireless Hybrid Asynchronous Time-bounded WIMP Windows, Icons, Mice and Pointers WMAC Wireless Media Access Control WMF Windows metafile WORM Write-Once Read-Many WORM Write Once, Read Many times WOSA Windows Open Services/Systems Architecture WRED Wrong Reading Emulsion Down WREU Wrong Reading Emulsion Up WS Wait State WS WorkStation WTO Write To Operator WUS Word Underscore WWW World Wide Web WXTRN Weak External Reference WYSIWYG What You See Is What You Get XA EXtended Architecture XGA eXtended Graphics Array XLT Transaction List Table XMS Extended Memory Specification XOR Exclusive-Or XT eXtended Technology YIQ (color components in NTSC color space) YUV (color components in SECAM and PAL color spaces) ZF Zero Flag ZIF Zero Insertion Force

Muntasir Hossain, Last Updated - 6.4.98