L... L2F Layer Two Forwarding [Cisco] L2TP Layer Two Tunneling Protocol LADDR Layered Device Driver Architecture [MicrosoFT] LALL Longest Allowed Lobe Length LAN Local Area Network LANACS Local Area Network Asynchronous Connection Server LANDP LAN Distributed Platform LANE Local Area Network Emulation LANG Language LAPB Link Access Procedure Balanced (protocol) LAPD Link Access Procedure on the D-Channel (protocol) LAPM Link Access Procedure for Modems LAR Load Access Rights LASER Light Amplification by Stimulated Emission of Radiation LASTport Local Area Storage Transport (protocol) [DEC] LAT Local Access Terminal + Local Area Transport [DEC] LATA Local Access and Transport Area LAVC Local Area VAX Cluster LAWN Local Area Wireless Network LB Left Button (of 2 or 3 button Mouse) LBA Logical Block Addressing LBL Label LBR Librarian Library (file name extension) LBT Listen Before Talk LBX Local Bus Accelerator LCA Lotus Communications Architecture [Lotus] LCC Leadless Chip Carrier LCD Liquid Crystal Display + Lowest Common Denominator LCF Low Cost Fiber LCK Library Construction Kit [Microsoft FoxPro] LCP Link Control Protocol LCR Least Cost Routing + Line Control Register LCSD Laminate Chip Signal Diode LCU Last Cluster Used LDA Logical Device Address LDAP Lightweight Directory Access Protocol [IBM] LDC Lotus Development Corporation LDDS Long Distance Discount Services (company) LDM Long Distance Modem LDT Local Descriptor Table LE Less or Equal LEA Load Effective Address LEAF Law Enforcement Access Field LEC Local Area Network Emulation Client + Local Exchange Carrier LED Light Emitting Diode LEL Link, Embed and Launch-to-edit [Lotus] LEM Language Extension Module LEN Low Entry Networking LEO Low Earth Orbit LES Local Area Network Emulation Server Letter (file name extension) LEX Lexicon LF Line Feed LFAP Lightweight Flow Admission Protocol LFI Last File Indicator LFN Long File Name LFT Low Function Terminal [IBM] LFU Least Frequently Used LGA Leadless Grid Array LGDT Load Global Descriptor Table LIAS Library Information Access System Library (file name extension) LIC Line Interface Coupler [IBM] LICS Lotus International Character Set [LDC] LIDT Load Interrupt Descriptor Table LIEP Large Internet Exchange Packet [Novell] LIF Low Insertion Force LIFO Last In, First Out LILO Last In, Last Out LIM Lotus/Intel/Microsoft LIMA Lotus/Intel/Microsoft/AST LIMDO Light Intensity Modulation Direct Overwrite LIMM Light Intensity Modulation Method LIMS Library Information Management System LINUX (Operating system named after Linus Torvalds) LIP Large Internet Packet LIPS Lightweight Internet Person Schema + Logical Inferences Per Second LISP List Processing (Language)(See HLL) LISTSERV List Server [Internet] LIU LAN Interface Unit LIW Long Instruction Word LLC Logical Link Control LLDT Load Local Descriptor Table LLF Low Level Format LMB Left Mouse Button LMBCS Lotus Multi-Byte Character Set [Lotus] LMD Last Modification Date LMDS Local Multipoint Distribution Service LMI Link/Local Management Interface LMS Lotus Messaging Switch [Lotus] LMSW Load Machine Status Word LMU LAN Management Utilities [IBM] + LAN Manager for Unix LN Load Number + Logarithm (Natural) LN:DI Lotus Notes:document Imaging LNK Link LOB Line of Business LOC Lines Of Code + Loop On-Line Control LOCIS Library of Congress Information System LOD Level Of Detail LODSB Load String Byte LOG Logarithm (Base 10) LOGO (Programming Language)(See HLL) LON Local Operating Network LOOPE Loop while Equal LOOPNE Loop while Not Equal LOOPNZ Loop while Not Zero LOOPZ Loop while Zero LORE Line Oriented Editor LPAR Logic Programming and Automated Reasoning LPC Local Procedure Call LPD Line Printer Daemon (protocol) [Berkley] LPI Lines Per Inch LPL Lotus Programming Language [Lotus 1-2-3] [LDC] LPM Lines Per Minute LPN Logical Page Number LPR Line Printer Remote LPS Low-Power Schottky LPT Line Printer LPT1 First Parallel Printer Port LPT2 Second Parallel Printer Port LPT3 Third Parallel Printer Port LQ Letter Quality LQM Link Quality Monitoring (protocol) LR Link Register LRC Local Register Cache + Longitudinal Redundancy Check LRL Least Recently Loaded LRM Language Reference Manual + Least Recently-Used Master Language Resource (file name extension) [WordPerfect] LRU Least Recently Used LSA LAN and SCSI Adapter [IBM] + Line Sharing Adapter + Local Security Authority [Microsoft] LSAPI License Services Application Program Interface LSB Least Significant Bit LSC Least Significant Character LSD Least Significant Digit LSI Large Scale Integration LSL Link Support Layer + Load Segment Limit LST List List (file name extension) LTO Linear Tape Open LTR Left-To-Right + Letter + Load Task Register LU Logical Unit (Also LUN) LUA Logical Unit Application (interface) LUI Local User Input LUIS Library User Information Service LUN Logical Unit Number LUT Lookup Table LV Logical Volume [IBM] LVDS Low-Voltage Differential Signaling LVM Logical Volume Management [IBM] LW Lazy Write Lyrics (music file name extension) LZW Lempel-Ziv-Welch (algorithm) M... mA Milliampere MAC Macintosh (Apple Macintosh Computer) + Media/Medium Access Control + Message Authentication Code MAC * Multiple Access Computers MacPaint (file name extension) + Macro (file name extension) MACH Multilayer Actuator Head [Epson] MADE Manufacturing and Automated Design Engineering MADYMO Mathematical Dynamic Modeling [TNO] MAE Merit Access Exchange + Metropolitan Area Ethernet MAGMA Minimal Architecture for Generalized Markup Applications mAh Milliampere-Hour MAI Multiple Applications Interface Mail (file name extension) MAJC Microprocessor Architecture for Java Computing [Sun] MAN Manual [Unix] + Metropolitan Area Network MANIAC * Mathematical Analyzer Numerical Integrator and Computer MANPAGE Manual Page [Unix] MAP Maintenance Analysis Procedures + Manufacturing Automation Protocol + Memory Allocation Map Linker Map (file name extension) MAPI Mail/Messaging Applications Programming Interface [Microsoft] MAPICS Manufacturing, Accounting and Production Information Control System [IBM] MARC Machine Readable Cataloging + Multi-Technology Automated Reader Card MARVEL Machine-Assisted Realization of the Virtual Electronic Library [Library of Congress] MASM Macro Assembler [Microsoft] MASS Maximum Availability and Support Subsystem [Parallan] MAT Maintenance Access Terminal MAU Media Access/Adapter Unit + Multistation Access Unit MAVDM Multiple Application VDM MAX Maximum MB Megabyte (1,024 kilobytes) + Middle Button (of 3 button Mouse) MBASIC Microsoft BASIC [Microsoft] MBCS Multi-Byte Character Set [IBM] MBONE Multicast Backbone [Internet] MBps Megabytes Per Second Mbps Megabits Per Second MBR Master Boot Record MBX Mailbox MCA Micro Channel Adapter/Architecture [IBM] MCAD Mechanical Computer Aided Design MCB Memory Control Block MCF Meta Content Framework MCGA Multicolor Graphics Array MCI MCI Communications Corp. (name from initials of original company - Microwave Communications, Inc.) + Media Control Interface [Microsoft] MCL Microsoft Compatibility Labs [Microsoft] MCM Multi-Chip Module MCNE Master Certified Novell Engineer [Novell] MC-PGA Metallized Ceramic - Pin Grid Array MCPS Microsoft Certified Product Specialist [Microsoft] MC-QFP Metallized Ceramic - Quad Flat Pack MCR Modem Control Register MCSD Microsoft Certified Systems Developer [Microsoft] MCSE Microsoft Certified Systems Engineer [Microsoft] MCU Microcontroller Unit + Multi-Chip Unit [DEC] + Multipoint Control Unit MD Make Directory + Mini Disk [Sony] + Monochrome Display MDA Monochrome Display Adapter + Multidimensional Analysis MDDBMS Multidimensional Data Base Management System Menu Definition File (file name extension) MDI Memory Display Interface + Multiple document Interface MDIC Manchester Decoder and Interface Chip [AT&T] MDK Multimedia Developers Kit [Microsoft] MDLP Mobile Data Link Protocol MDR Minimum Design Requirement MDY Month Day Year Opening Information (file name extension) (As in ) MEB Memory Expansion Board MEG Megabyte MEM Memory Menu (file name extension) MERCI Multimedia European Research Conferencing Integration MES Manufacturing Execution System MESI Modified, Exclusive, Shared and Invalid (protocol) MET Memory Enhancement Technology [Hewlett-Packard] Metafile (file name extension) MFC Microsoft Foundation Class [Microsoft] MFFS Microsoft Flash File System [Microsoft] MFI Multifunction Interpreter MFIOP Multifunction I/O Processor MFLOPS Million Floating Point Operations Per Second MFM Modified Frequency Modulation MFP Multi-Function Peripheral/Product MFPI Multifunction Peripheral Interface MFS Macintosh File System [Macintosh] + Magnetic Tape Field Search + Memory File System Modified Filing System [Revelation Technologies] MFT Master File Table + Multiprogramming with a Fixed number of Tasks MGA Monochrome Graphics Adapter MGCP Media Gateway Control Protocol MGE Modular GIS Environment MGET Multiple Get [Unix] MGML Minimal Generalized Markup Language MGR Manager MHS Message Handling Service + Message Handling System MHz Megahertz MI Management Interface MIB Management Information Base MIC Message Integrity Check MICR Magnetic Ink Character Recognition MICRO One-millionth MICS Macro Interpretive Commands MIDI Musical Instrument Digital Interface MIF Management Information Format Management Information Files (file name extension) MIG Metal In Gap MII Microsoft/IBM/Intel MIL Machine Interface Layer [Go Corporation] + Military (Domain name) [Internet] MIM Map Image Metafile + Metal-Insulator-Metal (screen) MIMD Multiple Instruction Multiple Data Stream (processor) MIME Multipurpose Internet Mail Extension [Internet] MI/MIC Mode Indicate/Mode Indicate Common MIN Minimum + Mobile Identification Number MIND Microsoft Internet Developer [Microsoft] MINUET Minnesota Internet Users Essential Tools [Internet] MIPS Million Instructions Per Second MIS Management Information System + Multimedia Information Sources [Internet] MISC Miscellaneous MIX Member Information Exchange MKDIR Make Directory ML Machine Language + Meta Language MLAPI Multilingual Application Programming Interface MLC Multilayer Ceramic + Multilevel Cell (program) [Internet] MLE Multi-Line Editor MLID Multi-Link Interface Driver MLM Mailing List Manager [Internet] MLPPP Multilink PPP MM Minutes + Month MMA Microcomputer Managers Association MMC Matched Memory Cycle + Microcomputer Marketing Council + Microsoft Management Console [Microsoft] MMCD MultiMedia Compact Disk MMCX Multimedia Communication Exchange [Lucent Technologies] MMI Man-Machine Interface MMIS Materials Manager Information System MMPM Multi Media Presentation Manager MMU Memory Management Unit MMVF Multimedia Video File [NEC] MMX Matrix Manipulation Extensions [Intel] + Multimedia Extensions MNOS Metal Nitride Oxide Semiconductor MNP Microcom Networking Protocol [Microcom] Menu (fine name extension) MO Magneto-Optical (disk drive) MOB Memory-Order Buffer MOBO Mother Board MOD Module + Modulus MODEM Modulator Demodulator MOHLL Machine Oriented High Level Language MOLAP Multidimensional On-Line Analytical Processing MOM Manufacturing Operations Management + Message-Oriented Middleware + Microsoft Office Manager [Microsoft] MONET Multiwavelength Optical Networking MONO Monaural MOO MUD, Object Oriented [Internet] MOP Maintenance Operations Protocol MOPS Million Operations Per Second MOS Magneto-Optic Storage + Mean Opinion Score + Metal Oxide Semiconductor MOSFET Metal Oxide Semiconductor Field Effect Transistor MOTD Message Of The Day MOV Metal Oxide Varistor + Move MOVS Move String MP Massively Parallel (processing) + Multiple Processors MP3 MPEG Audio Layer 3 MPC Multimedia Personal Computer + Multipath Channel MPCS Mission Planning and Control Station (Software) MPE Multiple Programming Executive [HP] MPEG Moving Picture Experts Group MPI Message Passing Interface + Multiprecision Integer MPM Message Passing Library [IBM] MPMD Multiple Processor/Multiple Data MPOA Multi-Protocol over Asynchronous-Transfer-Mode MPP Massively Parallel Processing + Message Posting Protocol + Message Processing Program MPQP Multi-Protocol Quad Port [IBM] MPR Multipart Repeater + Multi Protocol Router [Novell] MPS Multiprocessor Specification MPTN Multi-Protocol Transport Network MPTS Multi-Protocol Transport Services MPU Microprocessor Unit MQI Messaging and Queuing Interface [IBM] MR Magneto Resistive + Modem Ready MRCF Microsoft Realtime Compression Format MRCI Microsoft Realtime Compression Interface MRI Magnetic Resonance Imaging MRM Most Recently-Used Master MRO Multi-Region Operation MRP Materials Requirement Planning MRPL Main Ring Path Length MRS Media Recognition System MRT Mean Repair Time MRU Maximum Receive Unit MS Memory System + Message Store + Microsecond + Microsoft Corporation + Millisecond MSACM Microsoft Audio Compression Manager [Microsoft] MSAU Multi-Station Access Unit MSAV Microsoft Anti Virus [Microsoft] MSB Most Significant Bit MSBF Mean Swaps Between Failures MSCDEX Microsoft Compact Disc Extensions [Microsoft] MSCHAP Microsoft Challenge Handshake Authentication Protocol [Microsoft] MSD Mass Storage Device + Most Significant Digit + Microsoft System Diagnostics [Microsoft] MSDE Microsoft Data Engine MSDN Microsoft Developer Network [Microsoft] MS-DOS Microsoft - Disk Operating System [Microsoft] MSDR Multiplexed Streaming Data Request MSDS Microsoft Developer Support [Microsoft] MSFR Minimum Security Function Requirements [IBM] MSG Message Program Message (file name extension) MSI Medium Scale Integration MSIE Microsoft Internet Explorer [Microsoft] MSL Map Specification Library + Mirrored Server Link MSMQ Microsoft Message Queue-Server [Microsoft] MSN Microsoft Network [Microsoft] MSO Multiple-Systems Operator Microsoft Paint (file name extension) [Microsoft] MSRP Manufacturer Suggested Retail Price MSS Mass Storage System + Multiprotocol Switched Services [IBM] MSTS Microsoft Terminal Server [Microsoft] MSW Machine Status Word MTA Message Transfer Agent + Multiple Terminal Access MTBB Mean Time Between Breakdowns MTBF Mean Time Between Failures MTBJ Mean Time Between Jams MTF Microsoft Tape Format [Microsoft] + Modulation Transfer Function MTRP Maximum Transfer Rate Performance MTS Message Transfer Service/System + Microsoft Transaction Server [Microsoft] + Multichannel Television Sound MTST Magnetic Tape Selectric Typewriter [IBM] MTT Multi-Transaction Timer MTTD Mean Time To Diagnose MTTF Mean Time To Failure MTTR Mean Time To Repair MTU Maximum Transmission Unit MUA Mail User Agent MUD Multi-User Dialogue/Dimension/Domain/Dungeon [Internet] MUL Multiply MULTICS Multiplexed Information and Computing Service MUMPS Massachusetts General Hospital Utility Multi-Programming System (Programming Language) MUSE Multi-User Shared Environment MUT Monitor Under Test MUX Multiplexer mV Millivolt MVB Multimedia Viewer Book MVC Multimedia Viewer Compiler MVDM Multiple Virtual DOS Machines MVGA Monochrome Video Graphics Array MVIP Multi-Vendor Integration Protocol MVP Multimedia Video Processor MVS Multiple Virtual Storage MVT Multiprogramming with a Variable number of Tasks MX Mail Exchanger [Internet] MXS Microsoft Exchange Server [Microsoft] MZR Multiple Zone Recording N... NAC Network Adapter Card NACD National Association of Computer Dealers NACS National Advisory Committee on Semiconductors NAE Not Above or Equal NAK Negative Acknowledgment NAM Number Assignment Module NAMPS Narrow-Band Analog Mobile Phone Service [Motorola] NAND Not And NANO One thousand-millionth NAP Network Access Point NAPLPS North American Presentation Level Protocol Syntax (graphics) NAS Network Access Server + Network Application Support [DEC] + Network Attached StorageNASA National Aeronautics and Space Administration NASDAQ National Association of Securities Dealers Automatic Quotation NASI NetWare Asynchronous Services Interface [Novell] NASIRC NASA Automated Systems Internet Response Capability NASKER NASA Ames Kernel (benchmark) NAT Network Address TranslatorsNAU Network Addressable Unit NAWS Negotiate About Window Size NBE Not Below or Equal NBI Nothing But Initials NBMA Non-Broadcast Multi Access NBS Narrowband Socket + National Bureau of Standards + Numeric Backspace NC Network Computer + No Carry + Numerical Control NCA Network Communications Adapter + Network Computing Architecture [Oracle] NCC Network Control Center NCD Network Computing Device Netware Command File [Novell] NCGA National Computer Graphics Association NCIC National Crime Information Center NCMT * Numerical Control for Machine Tools NCOS Network Computer Operating System NCP NetWare Core Protocol + Not Copy Protected + Network Control Processor/Program/Protocol NCR National Cash Register (Company) NCSA National Center for Supercomputing Applications NCSC National Computer Security Center NCSI Network Communications Services Interface [Network Products Corp.] NDB Non-Directional Beacon NDDK Network Device Development Kid [Microsoft] NDEF Not to be Defined NDIS Network Device/Driver Interface Specification NDL Network Data Language NDMP Network Data Management Protocol NDN Non-Delivery Notice NDP Numeric Data Processor NDR Network Data Representation NDRO Non-Destructive Read Out NDS NetWare Directory Service [Novell] Index (file name extension) NEC Nippon Electric Company NED NASA Extragalactic Database [NASA] NEG Negative + Negate NEMA National Electrical Manufacturers Association NEP Network Entry Point NES National Education Supercomputer NEST Novell Embedded Systems Technology [Novell] Networks (Domain Name) [Internet] NetBIOS Network Basic Input/Output System [IBM] NetBEUI NetBIOS Extended User Interface [IBM] NETMON Network Monitor New Information (file name extension) NEWS NetWare Early Warning System [Frye Computer] + Network Extensible Window System NEWS. Current events [USENET Newsgroup Category] NEXT Near-End Crosstalk NFF No Fault Found NFS Network File System [Sun] NG No Good NGE Not Greater or Equal NGI Next-Generation Internet NHC National Hurricane Center NHR National Handwriting Recognition NHRP Next Hop Resolution Protocol N/I Non-Interlaced NIA Next Instruction Address NIC Network Information Center [Internet] + Network Interface Card + Numeric Intensive Computing NICAD Nickel-Cadmium NICOLAS Network Information Center OnLine Aid System [NASA] NID New Interactive Display [NEC] + Next ID NII National Information Infrastructure NIM Network Installation Management [IBM] NIMH Nickel-Metal Hydride NIO Native Input/Output NIPS Network I/Os Per Second NIR Network Information Retrieval NIS Network Information Service [Unix] N-ISDN Narrowband ISDN + National ISDN NISO National Information Standards Organization NISP Networked Information Services Project NIST National Institute for Standards and Technology NITC National Information Technology Center NIU Network Interface Unit NJE Network Job Entry (protocol) [IBM] NL New Line NLE Not Less or Equal NLM NetWare Loadable Module [Netware] NLP Natural-Language Processing NLQ Near Letter Quality NLSFUNC National Language Support Function NLV National Language Version [IBM] NMI Non-Maskable Interrupt NMM NetWare Management Map [NetWare] NMOS Negative Channel Metal-Oxide Semiconductor NMP Network Management Protocol [AT&T] NMS Network Management System [Novell] NN Network Node + No News [Internet] NNI Network to Network Interface NNM Network Node Manager NNTP Network News Transfer Protocol [Internet] NOC Network Operations Center Individual with Personal Site (Domain Name) [Internet] NOP No Operation NOPAC Network OPAC NOR Not Or NOS Network Operating System NPA Network Printer Alliance + Numbering Plan Area NPI Network Printer Interface NPL Nonprocedural Language NPS Novell Productivity Specialist [Novell] NPT Non-Programmable Terminal NPTN National Public Telecomputing Network NPU Natural Processing Unit NPX Numeric Processor Extension NQS Network Queuing System [Cray] NRC National Research Council (Canada) NREN National Research and Education Network NRM Network Resource Manager NRZ Not Return to Zero NRZI Non Return to Zero Inverted NS Nanosecond (one-billionth of a second) + National Semiconductor (as in Ns16550 UART) + Network Supervisor + Non S NSAP Network Service Access Point NSAPI Netscape Server API [Netscape] NSA POLY National Security Agency Polygraph NSERC National Sciences and Engineering Research Council (Canada) NSF National Science Foundation NSFNET National Science Foundation Network NSI NASA Science Internet NSLOOKUP Name Server Lookup [Unix] NSM Netscape Server Manager [Netscape] NSP Native Signal Processing [Intel] + Network Service Provider NSSC NASA Standard Spacecraft Computer NSTC National Science and Technology Council NSTL National Software Testing Labs NT New Technology [Microsoft] NT-1 Network Terminator Type 1 NTAS NT Advanced Server [Microsoft] NTF No Trouble Found NTFS New Technology File System [Microsoft] NTIA National Telecommunications and Information Administration NTIS National Technical Information Service NTP Network Time Protocol NTRAS NT Remote Access Services [Microsoft] NTSA NetWare Telephony Services Architecture [Novell] NTSC National Television Standards Committee NTU Network Termination Unit NUI Network User Identification + Network User Interface + Notebook User Interface [Go Corporation] NUL Null + (dummy device) + (no device) NUMA Non-Uniform Memory Access NV No Overflow NVM Non-Volatile Memory NVOD Near-Video On Demand NVP Nominal Velocity of Propagation NVRAM Non-Volatile Random Access Memory NVT Network Virtual Terminal + Novell Virtual Terminal [Novell] NWS NetWare Web Server [Netware] NYM Anonymous O... OAB One-to-All Broadcast OAD Open Architecture Driver [Bernoulli] OAG Official Airline Guide + Online Air Guide OAI Open Applications Interface OAS One-to-All Scatter OBD On Board Diagnostics OBEX Object Exchange [Borland] OBJ Object OC Optical Carrier OCE Open Collaborative Environment [Apple] OCF Objects Components Framework [Borland] OCL Operation Control Language + Operator Control Language OCR Optical Character Recognition OCS On-Card Sequencer OCX OLE Custom Control ODA Open document Architecture ODAPI Open Database Application Programming Interface [Borland] ODBC Object-Oriented Database Connectivity + Open Data Base Connectivity [Microsoft] ODBMS Object-Oriented Database Management System (also see OODMS) ODI Open Datalink Interface [Novell] + Open Device Interconnect [NetWare] ODIF Open document Interchange Format ODL Object Definition Language ODM Object Data Manager [IBM] + Optimized Distribution Model [Compaq] ODMA Open document Management API ODP Open Distributed Processing ODS Open Data Services [Microsoft] + Operational Data Store ODSI Open Directory Service Interface [Microsoft] ODT Open Desk OEM Original Equipment Manufacturer OEP Operand Execution Pipeline OF Overflow Flag OFB Output Feedback (mode) OFDM Orthogonal Frequency Division Multiplexing OFMT Output Format for Numbers OFS Object File System [Microsoft] + Output Field Separator OFX Open Financial Exchange OH Off Hook OHCI Open Host Controller Interface OIDL Object Interface Definition Language OIS Office Information System OLAP On-Line Analytical Processing OLCP On-Line Complex Processing Old version (file name extension) OLE Object Linking and Embedding [Microsoft] OLGA On-Line Guitar Archive OLI Optical Line Interface [AT&T] OLMC Output Logic Macrocell OLSP On-Line Service Provider OLTP On-Line Transaction Processing OM Object Manager OMA Object Management Architecture [Microsoft] OME Open Messaging Environment (protocol) OMF Object Module Format [Microsoft] + Open Media Framework + Open Message Format OMG Object Management Group OMI Open Messaging Interface [Lotus] OML Object Manipulation Language OMR Optical Mark Recognition ONC Open Network Computing [Sun] ONDS Open Network Distribution Services [IBM] ONE Open Network Environment [Netscape] ONMS Open Network Management System ONU Optical Network Unit OOB Out Of Band OODB Object-Oriented Database OODMS Object-Oriented Database Management System (also see ODBMS) OOL Object-Oriented Language OOOS Object-Oriented Operating System OOPL Object-Oriented Programming Language OOPS Object Oriented Programming and Systems OOS Object-Oriented Systems + Off-line Operating Simulator OOT Object-Oriented Technology OOUI Object Oriented User Interface OP Operation + Optical + Output OPAC Online Public Access Catalog [Internet] OPC Organic/Optical Photoconductor OPCODE Operational Code OPD Operand OPI Open Prepress Interface OPM Operations Per Minute OPS Open Profiling Standard + Operations OPT Open Protocol Technology Options (file name extension) OPUS Octal Program Updating System OQL Object Query Language ORACLE On-Line Inquiry and Report Generator (UNIX DB program) ORB Object Request Broker [Microsoft] ORDVAC * Ordnance Variable Automatic Computer Non-Profit Organizations (Domain name) [Internet] ORI Online Retrieval Interface Original (file name extension) OROM Optical Read-Only Memory ORS Output Record Separator OS Operating System OS/2 Operating System/2 [IBM] OSA Open scripting/System Architecture OSD Open Software Description/Distribution OSE Office Server Extensions [Microsoft] OS/E Operating System/Environment OSF Open Software Foundation OSI Open Systems Interconnection OSM Off-Screen Model OSP On-Screen Programming + Optical Storage Processor OSPF Open Shortest Path First OSQL Object Structured Query Language OSR2 OEM Service Release 2 [Microsoft] OSS Open Source Software OT Object Technology OTA Operation-Triggered Architecture OTDR Optical Time Domain Reflectometer OTF Open Token Foundation OTP One-Time Programmable OUI Organizationally Unique Identifier OURS Open Users Recommended Solutions Outlines (file name extension) OUTS Output String OV Overflow OVAL Object-Based Virtual Application Language [Psion] Program Overlay (file name extension) Program Overlay (file name extension) OWL Object/Open Windows Library [Borland] P... P3P Platform for Privacy Preferences Project PAB Personal Address Book PABX Private Automatic Branch Exchange PACE PRiority Access Control Enabled [3Com] PACS Picture Archiving and Communication System PACS-L Public Access Computer Systems List [Internet] PAD Packet Assembler/Disassembler PADS Pen Application Development System [Slate Corporation] PAIH Public-Access Internet Host [Internet] PAIS Public-Access Internet Site [Internet] Packed (compressed file name extension) [NoGate Consulting] PAL Paradox Applications Language [Borland] + Phase Alternating Line + Programmed Array Logic + Programming Assembly Language Palette (file name extension) PALC Plasma-Addressed Liquid Crystal (display) PALS Principles of the Alphabet Literacy System PAM Pulse Amplitude Modulation PAN Personal Area Network [GTE] PAP Packet-level Procedure + Password Authentication Protocol + Printer Access Protocol PAR Personal Animation Recorder + Parallel PARA Paragraph PARC Palo Alto Research Center [XEROX] PA-RISC Precision Architecture-RISC [HP] PASCAL source code (file name extension) PASCAL (Programming Language named for Blaise Pascal) Patch + Pattern (file name extensions) PATN Promotional Port Access Telephone Number PAX Portable Archive Exchange [Unix] PB Petabyte (1,024 terabytes) (One Million Billion characters of information) PBA Printed Board Assembly PBE Prompt By Example PBGA Plastic Ball Grid Array PBX Private Branch Exchange PC Personal Computer + Printed Circuit + Program Counter PCACIAS Personal Computer Automated Calibration Interval Analysis System PCB Printed Circuit Board + Program Control Block PCBC Plain/Propagating Cipher Block Chaining PCD Photo Compact Disk PC-DOS Personal Computer - Disk Operating System [IBM] PCEB PCI to EISA Bridge [Intel] PCI Peripheral Component Interconnect/Interface PCIC PC-Card Interrupt Controller PC-I/O Program Controlled I/O PCL Printer Command Language [HP] + Process Control Language PCM Personal Computer Manufacturer + Printer Cartridge Metric [HP] + Pulse Code Modulation PCMA Paired Carrier Multiple Access PCMC PCI, Cache, Memory Controller [Intel] PCMCIA Personal Computer Memory Card International Association PCMIM Personal Computer Media Interface Module PCN Personal Computer Network PCNFS Personal Computer Network File System PCO Point of Control and Observation PCS Patchable Control Store + Personal Communication Services/System + Personal Conferencing Specification + Planning Control Sheet + Print Contrast Signal + Process Control Systems + Program Counter Store + Project Control System PCT Private Communications Technology Picture (file name extension) Picture Image (file name extension) PD Phase-Change Dual + Public Domain PDA Personal Digital Assistant Pilot Database (file name extension) [Palm Pilot] PDC Primary Domain Controller PDD Physical Device Driver + Portable Digital document PDF Package Definition File + Portable document Format + Portable document File + Processor Defined Function + Program Development Facility Printer Description (file name extension)[Borland,Lotus] PDH Plesiosynchronous Digital Hierarchy PDIAL Public Dialup Internet Access List [Internet] PDL Page Description Language + Program Description Language + Program Design Language PDM Product Data Management PDN Public Data Network PDO Portable Distributed Objects [Next] PDP Parallel Data Processing + Plasma Display Panel + Programmable Data Processor + (DEC Computer System Designation, i.e. PDP-8, PDP-11) PDS Packet Driver Specification + Partitioned Data Set + Planetary Data System + Portable document Software + Processor Direct Slot [Macintosh] PDSS Post Development and Software Support PDT Performance Diagnostic Tool [IBM] + Programmable Drive Table PDU Plug Distribution Unit + Protocol Data Unit Paradox files (file name extension) [Borland] + Printer Description Extension (file name extension) PE Parity Even + Processing Element + Protect Enable PEA Pocket Ethernet Adapter PEL Picture Element [IBM] PEM Privacy-Enhanced Mail [Internet] PEN SDK Pen Computing Software Development Kit PEP Packet Exchange Protocol + Packetized Ensemble Protocol [Telebit] PERC Power Edge RAID Controller PERL Practical Extraction and Report Language [Unix] PERT Program Evaluation and Review Technique PES Positioning Error Signal + Processor Enhancement Socket Processor Upgrade Socket PET Print Enhancement Technology [Compaq] Printer Font Binary (file name extension) PFE Programmer's File Editor Printer Font Metrics (file name extension) [Windows] PFN Page Frame Number PFR Power-Fail Restart PGA Pin Grid Array + Professional Graphics Adapter [IBM] PGC Program Group Control [Microsoft] PGDN Page Down Graphics (file name extension) [Hewlett-Packard] PGM Program PGML Precision Graphics Markup Language PGP Pretty Good Privacy (name of encryption program) ProGram Parameter (file name extension) [AutoCAD] PGUP Page Up PHIGS Programmers' Hierarchical Interactive Graphics Standards Phone List (file name extension) PHS Personal Handyphone System PI Program Interruption PIA Peripheral Interface Adapter PIC Personal Information Carrier + Personal Intelligent Communicator + Platform for Internet Content + Priority Interrupt Controller + Program Interrupt Controller PICS Platform for Internet Content Selection [W3C] PICT Picture PID Process Identification Number + Product ID + Proportional, Integral, Derivative PIER Procedures for Internet/Enterprise Renumbering PIF Picture Interchange Format File + Program Information File PII Program Integrated Information PILOT Programmed Inquiry Learning Or Teaching PilotACE* Pilot Automatic Computing Engine PIM Personal Information Manager + Primary Interface Module + Protocol-Independent Multicast PIN Personal Identification Number + Process Identification Number [Unix] PINE Pine Is Not Elm (original usage) + Program for Internet News & Email (present usage) PING Packet Internet Groper PIO Parallel Input/Output + Processor Input/Output + Programmed Input/Output PIP Pattern and Information Processing + Picture In Picture + Problem Isolation Procedure + Programmable Interconnect Point PIPO Parallel In, Parallel Out PIR Protocol Independent Routing PIT Programmable Interval Timer PIXEL Picture Element PJPEG Progressive JPEG PKC Public Key Cryptography PL Plus Pearl Language (file name extension) PLA Programmable Logic-Array PLATO Programmed Logic for Automatic Teaching Operations PLC Programmable Logic Controller PLCC Plastic Leadless Chip Carrier PLD Programmable Logic Device PLDS Pilot Land Data System [NASA] PLL Phase Locked Loop Prelinked Library (file name extension) [Clipper] PL/M Programming Language for Micros PLS Primary Link Station PLV Production Level Video PL/1 * Programming Language One PM Presentation Manager [IBM] + Preventative Maintenance + Process Manager P-MAIL Paper Mail PMD Packet Mode Data PMMU Paged Memory Management Unit PMOS Positive Channel Metal Oxide Semiconductor PMR Problem Management Report [IBM] PMS Policy Management System PN Processing Node P/N: Part Number PNA Programmable Network Access PNG Portable Network Graphics PNNI Private Network to Network Interface PNP Plug And Play PO Parity Odd POC Point Of Contact POD Plain Old Dos + Publishing On Demand POE Power Open Environment POH Power-On Hours POL Problem Oriented Language POP Point Of Presence + Pop from Stack + Post Office Protocol POP3 Post Office Protocol, Version 3 POPA Pop All Registers POPF Pop Flags POR Power-On-Reset POS Point Of Sale + Positive + Programmable Object Select POSIX Portable Operating System Interface for Unix POST Power-On Self Test POSTNET Postal Numeric Encoding Technique (bar code) POTS Plain Old Telephone Service + Plain Old Time-Sharing POWER Performance Optimization with Enhanced RISC [IBM] PowerPC Performance Optimization with Enhanced RISC-Performance Computing PP Parallel Port PPA Pixel Processing Accelerator Postscript Printer Description (file name extension) PPDS Personal Printer Data Stream [IBM] PPGA Plastic Pin Grid Array PPI Precise Pixel Interpolation PPM Pages Per Minute PPP Point-to-Point Protocol [Internet] PPS Packets Per Second + Power Personal Systems [IBM] PPTP Point-to-Point Tunneling Protocol [Microsoft] PQFP Plastic Quad Flat Pack PRACSA Public Remote Access Computer Standards Association PRAM Parallel Random-Access Machine + Parameter Random Access Memory Pilot Resource (file name extension) [Palm Pilot] Printer Driver (file name extension) [Microsoft] PRE Preformatted [HTML] PReP Power PC Reference Platform [IBM/Motorola] PRF Pulse Repetition Frequency Preferences (file name extension) [Grammatik IV] Program (file name extension) PRI Primary-Rate Interface PRINTF Print with Formatting [C Programming Language] PRISM Photo-Refractive Information Storage Material Project (file name extension) [Borland] PRMD Private Management Domain [X.400] PRML Partial-Response Maximum-Likelihood Profile (file name extension) PROC Procedure PROFS Professional Office System [IBM] PROG Program + Programmer PROLOG Programming In Logic (Programming Language)(See HLL) PROM Programmable Read Only Memory PRN Printer Printer (file name extension) [WordPerfect] PRTSC Print Screen PS Proportional Spacing Postscript (file name extension) PS/2 Programming System 2 [IBM] PSAPI Presentation Space Application Programming Interface PSC Personal Super Computer + Print Server Command + Product Service Center PSDN Packet-Switched Data Network PSDS Packet-Switched Data Service PSERVER Print Server [NetWare] PSF Permanent Swap File PSID Postscript Image Data PSINET (formerly Performance Systems International) PSM Printing Systems Manager PSN Packet Switching Network + Processor Serial Number PSP Personal Software Products (group) [IBM] + Program Segment Prefix PSPDN Packet-Switched Public Data Network P-SRAM Pseudo-Static Random Access Memory PSRT Postscript Round Table [GEnie] PSTN Public Switched Telephone Network PSU Power Supply Unit PSW Program Status Word .Z Compressed Postscript (file name extension) [Unix] PT Page Table P/T Part Time PTD Parallel Transfer Disk Drive PTE Page Table Entry PTF Problem Temporary/Trouble Fix [IBM] PTI Packet Type Identifier PTT Postal Telephone & Telegraph PUB Public (directory) [Internet] + Publish Publication (file name extension) [Ventura] PUN Physical Unit Number PUP PARC Universal Packet (protocol) PUS Processor Upgrade Socket PUSHA Push All Registers PUSHF Push Flags PVC Permanent Virtual Circuit + Polyvinyl Chloride PVM Parallel Virtual Machine + Pass-through Virtual Machine (protocol) [IBM] PVP Parallel Vector Processing PVS Parallel Visualization Server PW Password PWB Printed Wire Board + Programmer's Workbench [Microsoft] PWD Print Working Directory [Unix] PWR Power PWSCS Programmable Workstation Communication Services [IBM] Primary Index (file name extension) [Paradox] Q... QA Quality Assurance QAM Quadrature Amplitude Modulation QBE Query By Example QBF Query by Form QBIC Query By Image Content [IBM] QC Quality Control QD Querty/Dvorak QDA Qualitative Data Analysis QDOS Quick and Dirty Operating System Quicken Dictionary (file name extension) [Intuit] Quicken Data (file name extension) [Intuit] QEMM Quarterdeck Expanded Memory Manager [Quarterdeck Corp.] QFA Quick File Access QFE Quick-Fix Engineering [Microsoft] QFP Quad Flat Pack QIC Quality Information Using Cycle Time [Hewlett-Packard] + Quarter-Inch Cartridge Quicken Import File/Interchange Format (file name extension) Quicken Memorized List (file name extension) [Intuit] Quicken Indexes to Data (file name extension) [Intuit] QOS Quality Of Service QPG Quantum Phase Gate QPSK Quadrature Phase Shift Keying QTC Quicktime Conferencing [Macintosh] R... RA Return Authorization Real Audio (file name extension) RACF Resource Access Control Facility RAD Rapid Application Development RADAR Radio Detection And Ranging + Rights, Availabilities, Distribution Analysis and Reporting [Disney] RADB Routing Arbiter Data Base RADIUS Remote Authentication Dial-In User Service RADSL Rate Adaptive Digital Subscriber Line RAG Row Address Generator RAID Redundant Arrays of Independent Disks + Redundant Arrays of Independent Drives + Redundant Arrays of Inexpensive Disks RAIS Redundant Arrays of Inexpensive Systems RALU Register Arithmetic Logic Unit RAM Random Access Memory Real Audio Metafile (file name extension) RAMDAC Random Access Memory Digital-to-Analog Converter [Sierra] RAMP Remote Access Maintenance Protocol [Internet] RAND Random RAP Rapid Application Prototyping RARP Reverse Address Resolution Protocol RAS Random Access Storage + Reader Admission System [British Library] + Reliability, Availability and Serviceability + Remote Access Service + Row Address Select RASAPI Remote Access Service Application Programming Interface [Microsoft] Rating (file name extension) RAVE Rendering Acceleration Virtual Engine [Apple Computer] Raw Data (file name extension) RB Right Button (of 2 or 3 button Mouse) RBBS Remote Bulletin Board System RBCS Remote Bar Code System RBOC Regional Bell Operating Company Resource (file name extension) RCL Rotate Carry Left RCP Remote Control Panel + Remote Copy [Internet] + Restore Cursor Position RCPT Recipient RCR Rotate Carry Right RCS Records Communications Switching System + Revision Control System [Unix] RD Receive Data + Remove Directory R&D Research and Development RDA Remote Database Access RDB Receive Data Buffer + Relational Database RDBMS Relational Database Management System RDCLK Received Timing Clock RDF Resource Description Framework [W3C] RDO Remote Data Object RDP Reliable Datagram Protocol + Remote Desk Protocol RDRAM Rambus DRAM RDSR Receiver Data Service Request RDTO Receive Data Transfer Offset [IBM] RDX Realistic Display Mixer Recorder (file name extension) + Recreational or Entertainment Activities (Domain Name) [Internet] REC. Recreation [USENET Newsgroup Category] Reference (file name extension) REG Register REGAL Rigid Epoxy Glass Acrylic Laminate RELSECT Relative Sector REM Remark + Remote + Ring Error Monitor REN Rename + Ringer Equivalence Number REP Repeat REPE Repeat while Equal REPNE Repeat while Not Equal REPNZ Repeat while Not Zero REPZ Repeat while Zero REQ Request REREG Re-Register RES Remote Execution Service + Reset + Resolution Resource (file name extension) RET Resolution Enhancement Technology [HP] + Return RETR Retrieve REX Relocatable Executable REXEC Remote Execution REXX Restructured Extended Executor (language) [IBM] RF Radio Frequency RFC Request For Comments [Internet] RFD Request for Discussion [Internet] RFI Radio Frequency Interference + Request for Information RFID Radio Frequency Identification RFP Request for Proposal RFQ Request for Quotation RFS Remote File Sharing + Remote File System RFT Revisable Form Text + Rich Text Format RFU Reserved For Future Use RGB Red-Green-Blue (color model) RI Referential Integrity + Ring Indicate RID Relative Identifier RIFF Resource Interchange File Format [Microsoft] RIM Remote Installation and Maintenance [Microsoft] RIME RelayNet International Message Exchange RIP Raster Image Processor + Remote Imaging Protocol + Routing Information Protocol [Novell] RIPEM Riordan's Internet Privacy Enhanced Mail RIPS Raster Image Processing System RISC Reduced Instruction Set Computing RIT Raw Input Thread [Microsoft] RJE Remote Job Entry RLD Received Line Detect RLE Run Length Encoded RLL Run Length Limited RLN Remote LAN Node [DCA] RLOGIN Remote Login RLSD Received Line Signal Detected RLSI * Ridiculously Large-Scale Integration RM Reset Mode RMA Return Material Authorization + Return to Manufacturer Authorization RMB Right Mouse Button RMDIR Remove Directory RMI Remote Messaging Interface + Remote Method Invocation [Sun] RMON Remote Monitor/Monitoring RMP Remote Maintenance Processor [IBM] RMS Record Management Services + Root Mean Square RMW Read-Modify-Write RN Read News [Internet] RNA Remote Network Access [Microsoft] RND Random RNG Random Number Generator RNP Regional Network Provider R-O Read Only ROB Reorder Buffer [Intel] ROI Return On Investment ROL Rotate Left ROLAP Relational On-Line Analytical Processing ROM Read Only Memory ROOM Real-Time Object-Oriented Modeling ROP Raster Operation + RISC Operation ROR Rotate Right ROS Read-Only Storage [IBM] ROSCOE Remote Operating System Conversational Online Environment ROT Running Object Table RPC Remote Procedure Call RPG Report Program Generator (Programming Language) RPL Resident Programming Language + Requested Privilege Level RPN Real Page Number + Reverse Polish Notation RPRINTER Remote Printer [NetWare] RPPROM Reprogrammable PROM RPR Relative Performance Rating RPT Repeat RPQ Request for Price Quotation RQBE Relational Query By Example [Fox Pro] RR Real Reality RS Radio Shack + Recommended Standard (as in RS-232) [EIA] + Record Separator + Request to Send RSA129 (129 digit cryptographic security number named after its inventors: Drs. Ronald L. Rivest, Adi Shamir and Leonard M. Adleman) RSAC Recreational Software Advisory Council RSCS Remote Spooling Communications System RSD Route Server Daemon RSH Remote Shell RSI Repetitive Strain Injury (Carpal Tunnel Syndrome) RSL Request-and-Status Link RSP Required Space Character RSPX Remote Sequenced Packet Exchange RST Reset + Restart RSTS Resource Sharing Time Sharing [Digital] RSVP Resource Reservation Protocol RSX Realistic Sound Experience + Real Time Resource Sharing Executive RT Real Time + RISC Technology + Run Time R/T Receive/Transmit RTAM Remote Terminal Access Method RTC Real-Time Clock RTDM Real-Time Data Migration RTEL Reverse Telnet [Internet] RTF Rich Text Format RTL Register Transfer Language/Level + Resistor Transistor Logic + Right-To-Left + Run Time Library RTM Response Time Monitor + Runtime Manager [Borland] RTMP Routing Table Maintenance Protocol RTN Reuters Transaction Network RTOS Real-Time Operating System RTP Rapid Transport Protocol + Real-Time Protocol RTS Remote Takeover System + Request To Send RTSP Real-Time Streaming Protocol RTTI Runtime Type Information RTTY Radio Teletypewriter (Communications) RTV Real Time Video RTX Run Time Extension RUN Rewind/Unload [IBM] RVA Relative Virtual Address RVI Reverse Interrupt R/W Read/Write RWIN Receive Window RWM Read-Write Memory RX Receiver RXD Receive Data S... SA Selective Availability SAA Systems Application Architecture [IBM] SABRE Semi-Automatic Business Research Environment SAC Single Attachment Concentrator SACL System Access Control List SADL Synchronous Data Link Control [Racal-Vadic] SAINT * Symbolic Automatic Integrator SAL Shift Arithmetic Left SAM Serial Access Memory + Sequential Access Method + Security Accounts Manager [Microsoft] + Single Application Mode [Microsoft] SAN Storage/System Area Network SANE Standard Apple Numeric Environment SAP Second Audio Program + Service Access Point [DEC] + Service Advertising Protocol + * Symbolic Assembly Program + Systems, Applications and Products (company) SAPI Speech Application Program Interface [Microsoft] SAR Segmentation and Reassembly + Shift Arithmetic Right + Successive Approximation Register + Synthetic Aperature Radar SAS Sales Accounting System + Single Attached Station + Single Audio System + Statistical Analysis System SASI Shugart Associates System Interface (SCSI originated from SASI) SATAN Security Administrator Tool for Analyzing Networks Saved (file name extension) SAVDM Single Application VDM SB Sound Blaster [Creative Labs] + Sound Board SBA Scene Balance Algorithms [Kodak] SBB Subtract With Borrow SBC Single-Board Computer SBCS Single-Byte Character Set SBI Sound Blaster Instrument Source Browser (file name extension) [Borland] SBS Smart Battery Specification [Duracell/Intel] script (file name extension) SCADA Supervisory Control and Data Acquisition SCAM SCSI Configuration Automatically SCAS Scan String SCB Subsystem Control Block [IBM] SCC Serial Communications Controllers + Serial Controller Chip + Synchronous Channel Check [IBM] SCCS Source Code Control System SCD Standard Color Display S-CDMA Synchronous Code-Division Multiple Access SCF System Control Facility SCI Scalable Coherent Interface + Serial Communications Interface SCI. Science [USENET Newsgroup Category] SCIL Serial Control Interface Logic SCLM Software Configuration and Library Management [IBM] SCM ScreenCam Format [Lotus] + Software Configuration Management + Station Class Mark SCO Santa Cruz Operation (Software Company) SCOPE Simple Communications Programming Environment [Hayes] SCP Save Cursor Position + Subsystem Control Port + System Control Program SCR Silicon Controlled Rectifier script (file name extension) SCRN Screen (video display) SCRS Scalable Cluster of RISC Systems SCSA Signal Computing System Architecture [Dialogic] SCSI Small Computer Systems Interface SD Send Data + Super Density SDA Software Disk Array + Source Data Automation + System Display Architecture [Digital] SDAM Single DOS Application Mode SDB Symbolic Debugger [Unix] SDD Software Description Database [Internet] + Subscriber Data document + System Distribution Directory SDF Space Delimited File + Space Delimited Format Standard Data Format (file name extension) SDH Synchronous Digital Hierarchy SDI Selective Dissemination of Information + Single document Interface Software Development Interface [Mosaic] SDK Software Development Kit [Microsoft] SDL Specification and Description Language SDLC Synchronous Data Link Control (protocol) SDM System Development Multitasking SDMS SCSI Device Management System [NCR] SDN Software Defined Network [AT&T] SDNS Secure Data Network Service SDR Streaming Data Request SDRAM Synchronous DRAM SD-ROM Super Density ROM SDS Sysops Distribution System SDSL Single-Line/Symmetric Digital Subscriber Line SD_STB Streaming Data Strobe [IBM] SDTV Standard Definition Television SDV Switched Digital Video [AT&T] SDX Storage Data Acceleration SEA Standard Extended Attribute [OS/2] Self Extracting Archive (file name extension) [Macintosh] SEAC * Name of first computer to use transistors, built by (National Bureau of) Standards Eastern Automatic Calculator (Also see SWAC) SEAL Segmentation and Reassembly Layer (protocol) + Screening External Access Link [Digital-DEC] SEC Single Error Correction SECAM Sequentiel Couleur Avec Memoire (Sequential Color With Memory) SECC Single Edge Contact Cartridge SED Stream Editor + Stream-Oriented Editor SEG Segment SEH Structured Exception Handling SEL Select SEM Scanning Electron Microscope + Standard Electronic Module + Strategic Enterprise Management [SAP] SEPP Secure Encryption Payment Protocol SER Serial SERCOS Serial Real-Time Communications System SET Secure Electronic Transaction + Softwave Engineering Technology Driver Set (file name extension) [Lotus 1-2-3] [LDC] + Image Settings (file name extension) [Paradox] SETEXT Structure Enhanced Text [Internet] SEU Smallest Executable Unit SF Sign Flag SFC System File Checker SFD Start Frame Delimiter SFDR Spurious-Free Dynamic Range SFN Short File Name SFQL Structured Full-text Query Language SFS System File Server SFT System Fault Tolerance SFX Sound Effect(s) SGA Shared Global Area SGEN Signal Generator + System Generator SGDT Store Global Descriptor Table SGI Silicon Graphics, Inc. SGM Shaded Graphics Modeling SGML Standard Generalized Markup Language SGR Set Graphics Rendition SGRAM Synchronous Graphics RAM S/H Sample and Hold SHA Secure Hash Algorithm [NSA] SHAR Shell Archive SHED Segmented Hypergraphic Editor SHG Segmented Hypergraphics SHL Shift Logical Left SHR Shift Logical Right SHTML Server-Side Include HyperText Markup Language S-HTTP Secure Hypertext Transfer Protocol SHV Standard High-Volume Show (file name extension) SI Shift-In + Source Index + System Information + System Integration SIC Standard Industrial Code SID Security Identifier + Serial Input Data + Station Identification [AT&T] + Symbolic Interactive Debugger + System ID SIDF System Independent Data Format SIDH System Identification for Home Systems SIDT Store Interrupt Descriptor Table SIFT Stanford Information Filtering Tool SIG Special Interest Group SIGCAT Special Interest Group on CD-ROM Applications and Technology SIM Simulator SIMD Single Instruction, Multiple Data-stream (processor) SIMM Single In-line Memory Module SIMTEL Simulation and Teleprocessing SIMULA Simulation (language) SIO Serial Input/Output (communications driver) SIP Session Initiation Protocol + Single In-line Package SIPC Simply Interactive Personal Computer [Microsoft] SIPO Serial In, Parallel Out SIPP Single In-line Pin Package SIR Serial Infrared [Hewlett-Packard] SIRDS Single-Image Random Dot Stereogram SI/SO Serial In/Serial Out + Shift In/Shift Out SIT Special Information Tones Stuff-It (compressed file name extension) [Macintosh] SIU System Interface Unit SKIP Simple Key-Management for Internet Protocols [Sun] SKU# Stock Keeping Unit Number SLA Service Level Agreement SLC Subscriber Line Concentrator SLDT Store Local Descriptor Table SLED Single Large Expensive Disk SLIC System Level Integration Circuit + System Licensed Internal Code [IBM] SLIM Structured Language for Internet Markup SLIP Serial Line Interface Protocol SLM Spatial Light Modulator SLMR Silly Little Mail Reader SLOSH Sea, Lake and Overland Surge from Hurricane (program) SLP Service Location Protocol SLSI Super Large-Scale Integration SLSS Systems Library Subscription Service [IBM] SLU Spoken Language Understanding SM Set Mode + Shared Memory SMART Self-Monitoring Analysis and Reporting Technology SMB Server Message Block (protocol) [MII] SMD Surface Mounted Device SMDR Station Message Detail Recording SMDS Switched Multimedia/Multi-Megabit Data Service SMF Single Mode Fiber + System Manager Facility [Compaq] SMI System Management Interrupt [Intel] SMIF Standard Mechanical Interface SMIL Synchronized Multimedia Integration Language S-MIME Secure MIME SMIT System Management Interface Tool [IBM] SMK Software Migration Kit [Microsoft] SML Standard Meta Language SMM System Management Mode [Intel] SMOBC Solder Mask Over Bare Copper SMP Simple Management Protocol + Symbolic Manipulation Program + Symmetrical Multi-Processing + Symmetric Multiprocessor Sample (file name extension) SMPC Shared Memory Parallel Computer SMPS Switching Mode Power Supply SMRAM System Management Random Access Memory SMS Small Messaging System + Storage Management Services [NetWare] + Storage Management Subsystem/System + Systems Management Server [Microsoft] SMSW Store Machine Status Word SMT Station Management (protocol) + Surface-Mount Technology SMTP Simple Mail Transfer Protocol SMU System Management Utility SN Serial Number S/N Signal-to-Noise (Ratio) SNA Systems Network Architecture [IBM] SNAP Sub-Network Access Protocol + Sub-Network Attachment Point SND Sound SNEWS Secure News Server [Internet] SNMP Simple Network Management Protocol SNOBOL String Oriented Symbolic Language (Programming Language) SNP Serial Number/Password [Omen Technology] SNR Signal-to-Noise Ratio SOA Start Of Authority SOC System On a Chip SOC. Social Issues [USENET Newsgroup Category] SOCKS Socket Secure (server) [Internet] SO-DIMM Small Outline DIMM SOE Standard Operating Environment SOH Start of Header SOHO Small Office/Home Office SOL Simulation Oriented Language SOM Start of Message + System Object Model [IBM] SONET Synchronous Optical Network SOP Small Outline Package + Standard Operating Procedures SOS Silicon On Sapphire + Sophisticated Operating System + Standards and Open Systems SOTA State Of The Art SOX Sound Exchange SP Service Pack [IBM] + Stack Pointer + System Product SPA Secure Password Authentication [Microsoft] + Software Publishers Association SPAN Space Physics Analysis Network SPARC Scalable Processor Architecture + Sun's Palo Alto Research Center SPC Small Peripheral Controller + Statistical Process Control SPCL Spectrum Cellular Corporation SPCS Stored Program Controlled Switch SPD Serial Presence Detect SPEC Systems Performance Evaluation Cooperative SPF Shortest Path First + System Programming Facility SPGA Staggered Pin-Grid Array SPI Security Parameters Index + Service Provider Interface + SCSI Parallel Interface SPID Service Profile/Provider Identifier SPIKE Science Planning Intelligent Knowledge-Based Environment [STScI] SPIRES Stanford Public Information Retrieval System [Stanford University] SPL Spooler + System Programming Language [HP] Spell Checker (file name extension) SPLD Simple Programmable Logic Device SPM System Performance Monitor [IBM] SPOOL Simultaneous Peripheral Operations On Line SPOT Shared Product Object Tree [IBM] SPP Sequenced Packet Protocol + Standard Printer Port SPPS Scalable Power Parallel System [IBM] SPR Special Purpose Register + Statistical Pattern Recognition + Symmetrical Phase Recording SPREAD * Systems Programming, Research, Engineering and Development [IBM] SPS Secure Packet Shield + Shock Protection System + Standby Power System SPSS Statistical Package for the Social Sciences SPT Sectors Per Track SPX Sequenced Packet Exchange [Novell] SQ Squeezed (files) SQE Signal Quality Error (test) SQL/DS Structured Query Language/Data System [IBM] SQOS Secure Quality Of Service SQRT Square Root SR Shift Register SRAM Shadow Random Access Memory + Static Random Access Memory SRAPI Speech Recognition API SRB Source-Route Bridge Source (file name extension) SRD Screen Reader System SRDRAM Self-Refreshed DRAM SRGB Sustained RGB (values) SRM Security Reference Monitor SRO Sharable and Read Only SRP Suggested Retail Price script (file name extension) SRPI Server-Requester Programming Interface SRQ Service Request SRR Serially Reusable Resource SRS Sound Retrieval System SS Stack Segment + Single Sided + Seconds SSA Serial Storage Architecture SSAP Source Service Access Point SSCP Systems Service Control Point [IBM] SSD Solid State Disk SSEC * Selective Sequence Electronic Calculator [IBM] SSGA System Support Gate Array SSH Secure Shell (protocol) SSI Server Side Includes + Single System Image + Small Scale Integration SSL Secure Sockets Layer SSPI Security Service Provider Interface [Microsoft] SSRP Simple Server Redundancy Protocol [Cisco] SST Spread-Spectrum Technology + Systems Services and Technology STA Spanning Tree Algorithm STAR Self Defining Text Archival STB Strobe STC Set Carry Flag STD Set Direction Flag + Standard STDA StreetTalk Directory Assistance [Banyan] STDAUX Standard Auxilary STDERR Standard Error STDIN Standard Input STDIO.H Standard Input/Output Header [C Programming Language] STDM Statistical Time Division Multiplexer STDOUT Standard Output STDPRN Standard Printer STEP Standard for Exchange of Product Structured File (file name extension) [Lotus Agenda] STI Set Interrupt Flag S/TK Sectors Per Track STL Standard Template Library STN Super-Twist Nematic E Businesses Offering Goods (Domain Name) [Internet] STOS Store String STP Secure Transfer Protocol + Shielded Twisted Pair (cable) + Signal Transfer Point + Synchronized Transaction Processing STR Store Task Register + Synchronous Transmitter Receiver STRESS Structural Engineering System Solver (Programming Language) STRUDL Structural Design Language (Programming Language) STScI Space Telescope Science Institute STT Secure Transaction Technology [Microsoft] STX Start of Text Style (file name extension) [Ventura, Word, WordPerfect] SUB Subroutine + Substitute + Subtract SUN Sun Microsystems, Inc. Supplemental Dictionary (file name extension) [WordPerfect] SVC Switched Virtual Circuit SVF Simple Vector Format SVG Scalable Vector Graphics SVGA Super Video Graphics Array S-VHS Super VHS SVM System Virtual Machine [Microsoft] SVN Switched Virtual Network [IBM] SVR Server SVR# System V Release Number [AT&T] S/W Software SWAC * Mobile version of SEAC, built for deployment to White Sands, and named Standards Western Automatic Calculator SWAIS Simple Wide Area Information Server [Internet] SWAP Shared Wireless Access Protocol SWIG Simplified Wrapper and Interface Generator SWISH Simple Web Indexing System for Humans SWP Simple Web Printing Swap (file name extension) Syllabus (file name extension) SYLK Symbolic Link Symbols (file name extension) Synonym (file name extension) SYNC Synchronous SYS System System Configuration (file name extension) + System Device Driver (file name extension) SYSADMIN System Administrator SYSGEN System Generator SYSLOG System Log SYSMOD System Modification SYSOP System Operator SYSREQ System Request SZ Send ZModem [Unix] T... TAB Tape Automated Bonding TACS Total Access Communication System TAD Telephone Answering Device TAP Telelocator Alphanumeric Protocol TAPCIS The Access Program for the CompuServe Information Service TAPI Telephony Applications Programming Interface Tape Archive (archived file name extension) [Unix] .Z Compressed Archived files (file name extension) [Unix] TAS Telephone Access Server TASM Turbo Assembler [Borland] TAXI Transparent Asynchronous Transceiver/Receiver Interface TB Terabyte (1,024 gigabytes) (One Thousand Billion characters of information) T/B and TBBS The Bread Board System (BBS) TBGA Tape Ball Grid Array Toolbook (file name extension) TBU Tape Backup Unit TC Test Control + Transmission Control TCL Tool Command Language TCM Trellis-Coded Modulation TCO Total Cost of Ownership TCP Tape-Carrier Package TCP/IP Transmission Control Protocol/Internet Protocol TD Transmit Data TDC Tabular Data Control TDD Telecommunications Device for the Deaf TDtoDP Tablet Coordinates to Display Coordinates (converting) TDE Terminal Display Editor Trace Definition File (file name extension) [OS/2] + Typeface Definition File (file name extension) TDI Transport Device Interface TDM Technical document Management + Time Division Multiplexing TDMA Time Division Multiple Access TDMS Terminal Display Management System TDP Tag Distribution Protocol [Cisco] + Telelocator Data Protocol TDSR Transmitter Data Service Request TDR Time Domain Reflectometry TE/2 Terminal Emulator/2 [Oberon] TEB Thread Environment Block TEC Tokyo Electronics Corporation TED Tiny Editor TEI Terminal Endpoint Identifier TELCO Telephone Company TEML Turbo Editor Macro Language [Borland] TEMP Temporary TER Thermal Eclipse Reading [Sony] TERMPWR Terminator Power TFDD Text File Device Driver TFEL Thin-Film Electroluminescent Tagged Font Metric (file name extension) TFT Thin-Film Transistor (screens) TFTP Trivial File Transfer Protocol THD Total Harmonic Distortion Thread (file name extension) THOMAS The (U.S.) House (of Representatives) Open Multimedia Access System THOR Tandy High-Performance Optical Recording THR Transmit Holding Register Thesaurus (file name extension) TI Texas Instruments, Inc. TIA Telecommunications Industry Association + The Internet Adapter [Internet] TID Target ID TIES Time Independent Escape Sequence Tagged Image File (filename extension) TIFF Tagged Image File Format TIGA Texas Instruments Graphics Architecture TIGER ologically Integrated Geographic Encoding and Referencing TIIAP Telecommunications and Information Infrastructure Assistance Program [NII] TIM Technical Information Memo [Compaq] TIMEZONES - - - - - - - - - - - - - - - - - GMT Offsets Offsets Eastward from GMT (+) Offsets Westward from GMT (-) AST - Atlantic Standard Time -4:00 AT - Azores Time -2:00 AHD - Alaska-Hawaii Daylight ::: AHS - Alaska-Hawaii Standard -10:00 BLT - Baghdad Local Time +3:00 BST - British Summer Time ::: CAT - Central Alaska Time -10:00 CCT - China Coast Time +8:00 CDT - Central Daylight Time ::: CET - Central European Time +1:00 CLT - Cairo Local Time +2:00 CST - Central Standard Time -6:00 EAD - East Australian Daylight ::: EAS - East Australian Standard +10:00 EDT - Eastern Daylight Time ::: EET - Eastern European Time +1:00 EMT - Eastern Mediterranean +2:00 EST - Eastern Standard Time -5:00 GMT - Greenwich Mean Time +0:00 HST - Hawaii Standard Time -10:00 JST - Japanese Standard Time +9:00 MDT - Mountain Daylight Time ::: MET - Middle European Time +1:00 MST - Mountain Standard Time -7:00 MTS - Moscow Time Standard +3:00 MTD - Moscow Time Daylight ::: NT - Nome Time -11:00 NZT - New Zealand Time +12:00 PDT - Pacific Daylight Time ::: PST - Pacific Standard Time -8:00 PST - Pakistan Standard Time +5:00 WAS - West Australian Standard +7:00 WAT - West Africa Time -1:00 WED - Western Europe Daylight ::: WES - Western Europe Standard +0:00 YDT - Yukon Daylight Time ::: YST - Yukon Standard Time -9:00 IDLE- International Date Line East +12:00 IDLW- International Date Line West -12:00 TIMI Technology Independent Machine Interface [IBM] TIMS Text Information Management Systems TINA Telecommunication Information Networking Architecture TIP Terminal Interface Processor + Transaction Internet Protocol TITOFET Tunneling-In, Tunneling-Out Field Effect Transistor TK/TK Track to Track TLA Three-Letter Acronym TLB Translation Lookaside Buffer Table (file name extension) TLD Level Domain TLI Transport Layer Interface TLS Transport Layer Security TLU Table Lookup Telex (file name extension) TM Trademark TMDS Transition Minimized Differential Signaling Template (file name extension) TMP Temporary TN Twisted Nematic TNC Terminal Node Controller TNO The Netherlands Organization ToC Table Of Contents TOD Time Of Day Technical and Office Protocol TPC Transaction-Processing Performance Council TPF Transactions Processing Facility [IBM] TPI Tracks Per Inch TPL Table Producing Language + Transaction Processing Language TPM Transactions Per Minute TPORT Twisted Pair Port Transceiver [AT&T] TPS Transactions Per Second + Transaction Processing System TPW Turbo Pascal for Windows TQFP Thin Quad Flat Pack TQM Total Quality Management TR Terminal Ready T/R Transmit/Receive TRACERT Trace Route [Microsoft] TRADIC * Transistorized Airborne Digital Computer (Name of first computer to be entirely transistorized) Terminal (file name extension) TRN Threaded Read News [Internet] + Token Ring Network TRON The Real-Time Operating System Nucleus TS Secret TSA Target Service Agent + Technical Support Alliance + Telephony Services Architecture TSAPI Telephony Services Application Program Interface [AT&T + Novell] TSB Termination Status Block TSD Type-Specific Driver TSE The Semware Editor TSO Time Sharing Option TSP Telephony Service Provider TSR Terminate and Stay Resident TSS Task State Segment + Time Sharing System TS/SI Secret/Sensitive Information Test (file name extension) TSTN Triple Supertwisted Nematic TSV Tab Separated values TT Typewriter Text TTA Transport-Triggered Architecture TTCN Tree and Tabular Combined Notation TrueType Font (file name extension) TTL Transistor-Transistor Logic TTP Thermal-Transfer Printing TTS Text-To-Speech + Transaction Tracking System TTY Teletype TUCOWS The Ultimate Collection of Winsock Software TUI Text-Based User Interface [WordPerfect] TUMS Table Update and Management System [Stanford University] Tutorial (file name extension) TVF Table of contents Verbosely from File [UNIX] TVFS Toronto Virtual File System [IBM] TVI Television Interference TVOL Television On-Line TWAIN Technology Without Any Interesting Name (connection between application and scanner software) TWX Teletypewriter Exchange Service TXD Transmit Data Tax Exchange Format (file name extension) TXT Text TXT2STF Text To Structured File [Lotus Agenda] TZ Time Zone [Unix] U... UA User Agent + User Area UAE Unrecoverable Application Error UAM User Authentication Method UART Universal Asynchronous Receiver/Transmitter UBR Unspecified Bit Rate 2 Compressed File (file name extension) [UltraCompressor] UCE Unsolicited Commercial Email UCL Universal Communications Language UCS Unicode Conversion Support + Universal Character Set + User Coordinate System UCT Universal Coordinated Time UDA Universal Data Access [Microsoft] UDB Universal Data Base UDC Universal Decimal Classification + User Defined Commands UDD User Data document UDE Universal Data Exchange UDEC * Universal Digital Electronic Computer [Burroughs] UDF Universal Disk Format + User Defined Functions UDG User Defined Gateway UDP User Datagram Protocol UDT Uniform Data Transfer + User-Defined Type UFS Unix File System UG User Group UHCI Universal Host Controller Interface UHF Ultra-High Frequency UHL Universal Hypertext Link UI Unix International + User Interface UIC User Identification Code UID User Identifier UIMS User Interface Management System UL Underwriters Laboratories + Unordered List + Upload ULA Uncommitted Logic Array ULN Universal Link Negotiation ULSI Ultra Large Scale Integration UMA Unified Memory Architecture UMB Upper Memory Block [LIM/AST] UML Unified Modeling Language UMTS Universal Mobile Telecommunications System UNC Universal Naming Convention + Uuencoded Netnews Collator [Unix] UNCOL Universal Computed Oriented Language UNI User-Network Interface UNICOM Universal Integrated Communication (System) UNICOS Universal Compiler FORTRAN compatible UNII Unlicensed National Information Infrastructure UNIVAC Universal Automatic Computer UNIX (AT&T Bell Laboratories Operating System) UNMA Unified Network Management Architecture UP Uniprocessor UPC Universal Product/Program Code + User Parameter Control UPG Upgrade UPL User Program Language UPM Unix Programmer's Manual + User Profile Management [IBM] UPS Uninterruptible Power Supply/System URC Uniform Resource Characteristics + Uniform Resource Citation UREP Unix RSCS Emulation Protocol (protocol) URI Uniform Resource Identifier URL Uniform Resource Locator URN Uniform Resource Name/Number US Unit Separator USART Universal Synchronous-Asynchronous Receiver/Transmitter USB Universal Serial Bus [Intel] USENET User's Network [Internet] USERID User Identification USOC Universal Service Ordering Code USQ Unsqueezed (files) USR US Robotics (corporation) USRT Universal Synchronous Receiver/Transmitter USSA User Supported Software Association (United Kingdom) UT User Terminal UTC Coordinated Universal Time UTI Universal Text Interchange/Interface UTP Unshielded Twisted-Pair (cable) UU Uuencode/Uudecode UUCP Unix-To-Unix Copy Program UUD UUDecoding [Unix] UUDECODE Unix-To-Unix Decoding UUE UUEncoding [Unix] UUENCODE Unix-To-Unix Encoding UUI User-To-User Information [AT&T] UUID Universal Unique Identifier UV Ultraviolet V... VA Virtual Address + Visual Age [IBM] VAD value Added Dealer VADD value Added Disk Driver VADSL Very-High-Rate Asymmetric Digital Subscriber Line VAL value + Voice Application Language Validity Checks (file name extension) [Paradox] VAM Virtual Access Method VAN value Added Network VAP value Added Process VAR value Added Reseller + value Added Retailer + Variable VAST Variable Array Storage Technology VAX/VMS Virtual Address Extension/Virtual Memory System [DEC] VB Variable Block + Visual Basic [Microsoft] VBA Visual Basic for Applications [Microsoft] VBE/AI Vesa Bios Extension/Audio Interface VBI Vertical Blanking Interval VBNS Very High Speed Backbone Network Service [MCI + NSF] VBR Variable Bit Rate VBRUN Visual Basic Runtime vbs Visual Basic script Visual Basic Extension (file name extension) VCC Virtual Channel Connection VCD Virtual Communications Driver VCI Virtual Circuit Identifier VCL Visual Component Library VCN Virtual Cluster Number VCOS Visual Caching Operating System [AT&T] VCPI Virtual Control Program Interface VCR Video Cassette Recorder VDD Virtual Device Driver VDDM Virtual Device Driver Manager VDE Video Display Editor + Visual Development Environment VDISK Virtual Disk VDM Virtual DOS Machine [IBM] VDMAD Virtual Direct Memory Access Device [Microsoft] VDS Virtual DMA Services VDSL Very-High-Data-Rate Digital Subscriber Line VDT Video Dial Tone + Video Display Terminal VDU Video Display Unit + Visual Display Unit VEGA Video-7 Enhanced Graphics Adapter [Video-7, Inc.] VEMM Virtual Expanded Memory Manager VEMMI Versatile Multimedia Interface VER Verify + Version VERONICA Very Easy Rodent-Oriented Net-Wide Index to Computer Archives [Internet] VERR Verify Read Access VERW Verify Write Access VES Video Encoding Standard [Oracle] VESA Video Electronics Standards Association VF Virtual Floppy VFAT Virtual File Allocation Table [Microsoft] t Class (communications standard) VFD Vacuum Fluorescent Display VFW Video For Windows [Microsoft] VGA Video Graphics Array VGC Video Graphics Controller VHDL VHSIC Hardware Description Language VHF Very-High Frequency VHS Very High Speed + Video Home System + Virtual Host Storage VHSIC Very High Speed Integrated Circuit VI Visual Interactive (editor) [UNIX] VIA Virtual Interface Architecture [Intel] VIE Virtual Information Environment VIF Virtual Interface + Virtual Interrupt Flag VIM Vendor Independent Mail + Vendor Independent Messaging + Video Interface Module VIO Video Input/Output + Virtual Input/Output VINES Virtual Networking System [Banyan] ViP Visual Programming [Lotus] VIP Variable Information Processing + Video Information Provider + Virtual Interrupt Pending VIPER Verifiable Integrated Processor for Enhanced Reliability VIS Video Information System [Tandy] + Visual Instruction Set [Sun] + Voice Information System VJ HEADER Van Jacobsen Header (compression) [Unix] VLAN Virtual Local Area Network VL-BUS Vesa Local-Bus [VESA] VLD Variable-Length Decoder VLF Very Low Frequency VLINK Visited Link [HTML] VLIW Very Large Instruction Word VLM Virtual Loadable Module VLSI Very Large Scale Integration VLSIPS Very Large Scale Immobilized Polymer Synthesis VLT Variable List Table VM Virtual Machine + Virtual Memory VMA Virtual Memory Address VMB Virtual Machine Boot VME Versa Module Eurocard + Virtual Memory Environment VML Vector Markup Language [Microsoft] VMM Virtual Machine/Memory Manager VMOS Vertical MOS VMP Virtual Modem Protocol VMS Virtual Machine Storage + Virtual Memory System + Voice Message System VMT Virtual Memory Technique VNA Virtual Network Architecture VOC Creative Voice (format) [Sound Blaster] VOD Video On Demand VOIP Voice Over Internet Protocol VOL Volume VOM Volt-Ohm-Milliammeter VOR Visions Of Reality VOS Verbal/Voice Operating System VP Virtual Path VPD Virtual Printer Device + Vital Product Data [IBM] VPDN Virtual Private Data Network VPDS Virtual Private Data Service [MCI] VPE Video Port Extensions [Microsoft] + Visual Programming Environment VPL Virtual Programming Language VPM Video Port Manager VPN Virtual Page Number + Virtual Private Network VPS Voice Processing System VPSC Vault, Process, Structure, Configuration VPT Virtual Print Technology [Dataproducts] VR Virtual Reality + Voltage Regulated/Regulator VRAM Video Random Access Memory VRD Virtual Retinal Display VRE Voltage Regulated Extended VRM Voltage Regulator Module VRML Virtual Reality Modeling Language (originally named Virtual Reality Markup Language) VROOMM Virtual Real-time Object Oriented Memory Manager [Borland] WordPerfect Graphics Driver (file name extension) VRT Voltage Regulation Technology [Intel] VRU Voice Response Unit VS Virtual Storage VSAM Virtual Storage Access Method VSAT Very Small Aperture Terminal VSE Virtual Storage Extended VSF Vertical Scanning Frequency VSI Virtual Socket Interface VSIO Virtual Serial Input Output VSM Virtual Shared Memory + Virtual Storage Management + Visual System Management [IBM] VSN Volume Serial Number VSOS Virtual Storage Operating System VSYNC Vertical Sync VT Vertical Tab VTAM Virtual Telecommunications Access Method [IBM] VTNS Virtual Telecommunications Network Service VTS Volume Tracking Driver VUI Video User Interface VUP VAX Unit of Performance VWB Visual WorkBench [Microsoft] VWM Virtual Window Manager VXA Variable-Speed Architecture [Ecrix] VxD Virtual Extended Driver [Microsoft] Virtual Device (file name extension) [Microsoft] V&V Verification and Validation W... W/ With W3 (see WWW) W3A World Wide Web Applets W3C World Wide Web Consortium W4 What-Works-With-What WAAS Wide Area Augmentation System WABI Windows Application Binary Interface [SunSoft] WAI Web Application Interface [Netscape] WAIS Wide Area Information Server WAITI Wait-For-Interrupt WAITS Wide Area Information Transfer System WAN Wide Area Network WAP Wireless Application Protocol WATS Wide Area Telecommunications Service Waveform Audio (file name extension) WBEM Web-Based Enterprise Management WC Word Count WCS World Coordinate System WDL Windows Driver Library [Microsoft] WDM Wavelength Division Multiplexing + Windows Driver Model [Microsoft] WDRAM Windows Dynamic Random Access Memory Entities Emphasizing the WWW (Domain Name) [Internet] WebNFS Web Network File System [Sun] WELL Whole Earth 'Lectronic Link (BBS) WFM Wired For Management [Intel] WFW Windows For Workgroups [Microsoft] WGS Work Group System WHAM Waveform Hold and Modify [Microsoft] WHC Workstation Host Connection WIN 9.X Windows95/Windows98 WINDBG Windows Debugger [Microsoft] WINE Windows Emulator WINForum Wireless Information Networks Forum WINS Windows Internet Naming Service [Microsoft] WINSOCK Windows Open Systems Architecture [Microsoft] + Windows Sockets WINWORD Word For Windows [Microsoft] WISE WordPerfect Information System Environment WIT Web Interactive Talk [Internet] Workbook (file name extension) [WordPerfect] Worksheet (file name extension) [Lotus 1-2-3] [LDC] Spreadsheet (file name extension) [BORQU] Worksheet (file name extension) [Lotus 1-2-3] [LDC] Compressed Spreadsheet (file name extension) [BORQU] 1 Worksheet (file name extension) [Lotus 1-2-3] [LDC] WL Word Line Dr. Watson Log (file name extension) WMC Workflow Management Coalition Windows Metafile Format (file name extension) [Microsoft] WMRM Write Many, Read Many WNIC Wide-Area Network Interface Co-Processor WNIM Wide-Area Network Interface Module W/O Without WORM Write Once, Read Many WOS Workstation Operating System WOSA Windows Open Services/Systems Architecture [Microsoft] WOW Window On Windows [Microsoft] WP WordPerfect + Word Processing + Write Protected Windows Printer Description (file name extension) WordPerfect Graphics (file name extension) WPHD Write-Protect Hard Disk Keyboard (file name extension) [WordPerfect] WPM Words Per Minute Macro (file name extension) [WordPerfect] WPOS Workplace Operating System WPS Windows Printing System [Microsoft] + Workplace Shell [OS2] WPVM Windows Parallel Virtual Machine 1 Spreadsheet (file name extension) [BORPQU] ! Compressed Spreadsheet (file name extension) [BORPQU] WRAM Windows Random Access Memory Write (file name extension) WRK Windows Resource Kit [Microsoft] WS WordStar + Workstation WSAPI Web Site Application Program Interface [O'Reilly] WSH Windows scripting Host [Microsoft] WT Write Through WTM Wired For Management WWIS World Wide Information System [Internet] WWW World-Wide Web [Internet] WYSBYGI What You See Before You Get It WYSIWYG What You See Is What You Get
