Common computing terms and there meaning

0–9
    * 1GL — First-Generation Programming Language
    * 10B2 — 10 Base2
    * 10B5 — 10 Base5
    * 10B-F — 10 Base-F
    * 10B-FB — 10 Base-FB
    * 10B-FL — 10 Base-FL
    * 10B-FP — 10 Base-FP
    * 10B-T — 10 Base-T
    * 100B-FX — 100 Base-FX
    * 100B-T — 100 Base-T
    * 100B-TX — 100 Base-TX
    * 100BVG — 100 BaseVG
    * 286 — Intel 80286 processor
    * 2B1Q — 2 Binary 1 Quaternary
    * 2GL — Second-Generation Programming Language
    * 3GL — Third-Generation Programming Language
    * 386 — Intel 80386 processor
    * 486 — Intel 80486 processor
    * 586 — Intel Pentium processor
    * 686 — Any of the Intel Pentium Pro, Pentium II, Pentium III, and Pentium 4 processors
    * 4B5BLF — 4 Byte 5 Byte Local Fiber
    * 4GL — Fourth-Generation Programming Language
    * 5GL — Fifth-Generation Programming Language
    * 8B10BLF — 8 Byte 10 Byte Local Fiber

A
    * AA — Anti-Aliasing
    * AAA — Authentication Authorization, Accounting
    * AABB — Axis Aligned Bounding Box
    * AAC — Advanced Audio Coding (audio compression format defined by the MPEG-2 standard)
    * AAL — ATM Adaptation Layer
    * AALC — ATM Adaptation Layer Connection
    * AARP — AppleTalk Address Resolution Protocol
    * ABI — Application Binary Interface
    * ABM — Asynchronous Balanced Mode
    * ABR — Area Border Router
    * ABR — Auto Baud — Rate Detect
    * ABR — Available Bit Rate
    * AC — Alternating Current
    * AC — Acoustic Coupler
    * ACD — Automatic Call Distributor
    * ACF — Advanced Communications Function
    * ACF NCP — Advanced Communications Function — Network Control Program
    * ACID — Atomicity Consistency Isolation Durability
    * ACK — ACKnowledgement
    * ACL — Access Control List
    * ACL — Active Current Loop
    * ACM — Association for Computing Machinery
    * ACME — Automated Classification of Medical Entities
    * ACPI — Advanced Configuration and Power Interface
    * ACR — Allowed Cell Rate
    * ACR — Attenuation to Crosstalk Ratio
    * AD — Active Directory
    * AD — Administrative Domain
    * ADC — Analog-To-Digital Converter
    * ADC — Apple Display Connector (DVI variant)
    * ADB — Apple Desktop Bus
    * ADCCP — Advanced Data Communications Control Protocol/Procedures
    * ADO — ActiveX Data Objects
    * ADSL — Asymmetric Digital Subscriber Line (variant of DSL)
    * AE — Adaptive Equalizer
    * AES — Advanced Encryption Standard
    * AF — Anisotropic Filtering
    * AFP — Apple Filing Protocol
    * AGP — Accelerated Graphics Port (sometimes used with a suffix indicating the port’s bandwidth, like AGP4x)
    * AH — Active Hub
    * AI — Artificial Intelligence
    * AIX — Advanced Interactive Executive
    * Ajax — Asynchronous JavaScript and XML
    * AL — Active Link
    * AL — Access List
    * ALGOL — Algorithmic Language
    * ALSA — Advanced Linux Sound Architecture
    * ALU — Arithmetic and Logical Unit
    * AM — Active Matrix
    * AM — Access Method
    * AM — Active Monitor
    * AM — Amplitude Modulation
    * AMD — Advanced Micro Devices
    * AMR — Audio Modem Riser
    * ANN — Artificial Neural Network
    * ANSI — American National Standards Institute
    * ANT — Another Neat Tool
    * AoE — ATA over Ethernet
    * AOP — Aspect-Oriented Programming
    * APCI — Application-Layer Protocol Control Information
    * API — Application Programming Interface
    * APIC — Advanced Programmable Interrupt Controller
    * APIPA — Automatic Private IP Addressing
    * APL — A Programming Language
    * APS — Accunet Packet Service
    * APR — Apache Portable Runtime
    * ARIN — American Registry for Internet Numbers
    * ARM — Advanced RISC Machines
    * ARP — Address Resolution Protocol
    * ARPA — Address and Routing Parameter Area
    * ARPA — Advanced Research Projects Agency (see also DARPA)
    * ARPANET — Advanced Research Projects Agency Network
    * AS — Access Server
    * ASCII — American Standard Code for Information Interchange
    * ASG — Abstract Semantic Graph
    * ASIC — Application Specific Integrated Circuit
    * ASLR – Address Space Layout Randomization
    * ASMP — Asymmetric Multiprocessing
    * ASN.1 — Abstract Syntax Notation 1
    * ASP — Application Service Provider
    * ASP (MS ASP) — Active Server Pages
    * ASR — Asynchronous Signal Routine
    * AST — Abstract Syntax Tree
    * ASSP — Application Specific Standard Product
    * AT — Advanced Technology
    * AT — Access Time
    * AT — Active Terminator
    * ATA — Advanced Technology Attachment
    * ATAG — Authoring Tool Accessibility Guidelines
    * ATAPI — Advanced Technology Attachment Packet Interface
    * ATM — Asynchronous Transfer Mode
    * AVC — Advanced Video Coding
    * AVI — Audio Video Interleaved
    * AWT — Abstract Windowing Toolkit

B
    * B2B — Business-to-Business
    * B2C — Business-to-Consumer
    * Bash — Bourne-again shell
    * BASIC — Beginner’s All-Purpose Symbolic Instruction Code
    * BBP — Baseband Processor
    * BBS — Bulletin Board System
    * BCD — Binary Coded Decimal
    * BEEP — Blocks Extensible Exchange Protocol
    * BER — Bit Error Rate
    * BFD — Binary File Descriptor
    * BFS — Breadth-First Search
    * BGP — Border Gateway Protocol
    * BiDi — Bi-Directional
    * bin — binary
    * BINAC — Binary Automatic Computer
    * BIND — Berkeley Internet Name Daemon
    * BIOS — Basic Input Output System
    * BJT — Bipolar Junction Transistor
    * bit — binary digit
    * Blob — Binary large object
    * Blog — Web Log
    * BMP — Basic Multilingual Plane
    * BNC — Bayonet Neill-Concelman
    * BOINC — Berkeley Open Infrastructure for Network Computing
    * BOM — Byte Order Mark
    * BOOTP — Bootstrap Protocol
    * BPDU — Bridge Protocol Data Unit
    * BPEL — Business Process Execution Language
    * BPL — Broadband over Power Lines
    * bps — bits per second
    * BRR — Business Readiness Rating
    * BSA — Business Software Alliance
    * BSD — Berkeley Software Distribution (Unix variant)
    * BSoD — Blue Screen of Death
    * BSS — Block Started by Symbol
    * BT — BitTorrent
    * BT — Bluetooth
    * BTAM — Basic Telecomunications Acess Method (an IBM OS/360 API)
    * BW — Bandwidth

C
    * CA — Certificate Authority
    * CAD — Computer-Aided Design
    * CAE — Computer-Aided Engineering
    * CAID — Computer Aided Industrial Design
    * CAI — Computer-Aided Instruction
    * CAM — Computer-Aided Manufacturing
    * CAPTCHA — Completely Automated Public Turing Test to tell Computers and Humans Apart
    * CAT – Computer-Aided Translation
    * CAQ — Computer Aided Quality
    * CASE — Computer-Aided Software Engineering
    * cc — C Compiler
    * CD — Compact Disc
    * CDE — Common Desktop Environment
    * CDMA — Code Division Multiple Access
    * CDP — Continuous Data Protection
    * CD-R — CD-Recordable
    * CD-ROM — CD Read-Only Memory
    * CD-RW — CD-Rewritable
    * CDSA — Common Data Security Architecture
    * CERT — Computer Emergency Response Team
    * CFWS — Comment and/or Folding White Space
    * CES — Consumer Electronics Show
    * CF — Compact Flash
    * CFD — Computational Fluid Dynamics
    * CFG — Context-Free Grammar
    * CFG — Control Flow Graph
    * CG — Computer Graphics
    * CGA — Color Graphics Array
    * CGI — Common Gateway Interface
    * CGI — Computer-Generated Imagery
    * CGT — Computational Graph Theory
    * CHAP — Challenge-Handshake Authentication Protocol
    * CHS — Cylinder-Head-Sector
    * CIFS — Common Internet Filesystem
    * CIM — Common Information Model
    * CISC — Complex Instruction Set Computer
    * CJK — Chinese, Japanese, and Korean
    * CJKV — Chinese, Japanese, Korean, and Vietnamese
    * CLI — Command Line Interface
    * CLR — Common Language Runtime
    * CM — Configuration Management
    * CM — Content Management
    * CMOS — Complementary Metal-Oxide Semiconductor
    * CMS — Content Management System
    * CN — Canonical Name
    * CN — Common Name
    * CNC — Computer Numerical Control
    * CNR — Communications and Networking Riser
    * COBOL — Common Business-Oriented Language
    * COM — Component Object Model
    * CORBA — Common Object Request Broker Architecture
    * COTS — Commercial Off-The-Shelf
    * CPA — Cell Processor Architecture
    * CPA — Control Panel Applet
    * CPA — Converged Packet Access
    * CPAN — Comprehensive Perl Archive Network
    * CP/M — Control Program/Monitor
    * cps — characters per second
    * CPU — Central Processing Unit
    * CR — Carriage Return
    * CRAN — Comprehensive R Archive Network
    * CRC — Cyclic Redundancy Check
    * CRLF — Carriage Return Line Feed
    * CRM — Customer Relationship Management
    * CRT — Cathode Ray Tube
    * CS — Cable Select
    * CS — Computer Science
    * CSE — Computer Science and Engineering
    * CSI — Common System Interface
    * CSRF — Cross-Site Request Forgery
    * CSS — Cascading Style Sheets
    * CSS — Content-Scrambling System
    * CSS — Closed Source Software
    * CSS — Cross-Site Scripting
    * CSV — Comma-Separated Values
    * CT — Computerized Tomography
    * CTAN — Comprehensive TeX Archive Network
    * CTCP — Client-To-Client Protocol
    * CTI — Computer Telephony Integration
    * CTL — Computational Tree Logic
    * CTM — Close To Metal
    * CTS — Clear To Send
    * CTSS — Compatible Time-Sharing System
    * CUA — Common User Access
    * CVS — Concurrent Versioning System

D
    * DAC — Digital-To-Analog Converter
    * DAC — Discretionary Access Control
    * DAO — Data Access Objects
    * DAO — Disk-At-Once
    * DAP — Directory Access Protocol
    * DARPA — Defense Advanced Research Projects Agency
    * DAT — Digital Audio Tape
    * DB — Database
    * DBA — Database Administrator
    * DBCS — Double Byte Character Set
    * DBMS — Database Management System
    * DCC — Direct Client-to-Client
    * DCCA — Debian Common Core Alliance
    * DCL — Data Control Language
    * DCMI — Dublin Core Metadata Initiative
    * DCOM — Distributed Component Object Model
    * DD — Double Density
    * DDE — Dynamic Data Exchange
    * DDL — Data Definition Language
    * DDoS — Distributed Denial of Service
    * DDR — Double Data Rate
    * DEC — Digital Equipment Corporation
    * DES — Data Encryption Standard
    * dev — device
    * DFA — Deterministic Finite Automaton
    * DFD — Data Flow Diagram
    * DFS — Depth-First Search
    * DFS — Distributed File System
    * DHCP — Dynamic Host Configuration Protocol
    * DHTML — Dynamic HTML
    * DIMM — Dual Inline Memory Module
    * DIN — Deutsches Institut für Normung
    * DIP — Dual In-line Package
    * DIVX — Digital Video Express
    * DIY – Do It Yourself devices
    * DKIM — Domain Keys Identified Mail
    * DL — Download
    * DLL — Dynamic Link Library
    * DLP — Digital Light Processing
    * DMA — Direct Memory Access
    * DMCA — Digital Millennium Copyright Act
    * DML — Data Manipulation Language
    * DMR — Dennis M. Ritchie
    * DN — Distinguished Name
    * DND — Drag-and-Drop
    * DNS — Domain Name System
    * DOCSIS — Data Over Cable Service Interface Specification
    * DOM — Document Object Model
    * DoS — Denial of Service
    * DOS — Disk Operating System
    * DP — Dot Pitch
    * DPI — Dots Per Inch
    * DPMI — DOS Protected Mode Interface
    * DPMS — Display Power Management Signaling
    * DRAM — Dynamic Random Access Memory
    * DRI — Direct Rendering Infrastructure
    * DRM — Digital Rights Management
    * DRM — Direct Rendering Manager
    * DSDL — Document Schema Definition Languages
    * DSDM — Dynamic Systems Development Method
    * DSL — Digital Subscriber Line
    * DSL — Domain-Specific Language
    * DSLAM — Digital subscriber line access multiplexer
    * DSN — Database Source Name (ODBC)
    * DSN — Dataset Name? (OS/390)
    * DSP — Digital Signal Processor
    * DSSSL — Document Style Semantics and Specification Language
    * DTD — Document Type Definition
    * DTE — Data Terminal Equipment
    * DTP — Desktop Publishing
    * DTR — Data Terminal Ready
    * DVD — Digital Versatile Disc
    * DVD — Digital Video Disc
    * DVD-R — DVD-Recordable
    * DVD-ROM — DVD-Read Only Memory
    * DVD-RW — DVD-Rewritable
    * DVI — Digital Visual Interface
    * DVR — Digital Video Recorder (see also PVR)

E
    * EAI — Enterprise Application Integration
    * EAP — Extensible Authentication Protocol
    * EBCDIC — Extended Binary Coded Decimal Interchange Code
    * EBML — Extensible Binary Meta Language
    * ECC — Elliptic Curve Cryptography
    * ECMA — European Computer Manufacturers Association
    * EDA — Electronic Design Automation
    * EDI — Electronic Data Interchange
    * EDO — Extended Data Out
    * EDSAC — Electronic Delay Storage Automatic Computer
    * EDVAC — Electronic Discrete Variable Automatic Computer
    * EEPROM — Electronically-Eraseable Programmable Read-Only Memory
    * EFF — Electronic Frontier Foundation
    * EFI — Extensible Firmware Interface
    * EFM — Eight-to-Fourteen Modulation
    * EGA — Enhanced Graphics Array
    * EGP — Exterior Gateway Protocol
    * eID — electronic ID card
    * EIDE — Enhanced IDE
    * EIGRP — Enhanced Interior Gateway Routing Protocol
    * EISA — Extended Industry Standard Architecture
    * ELF — Extremely Low Frequency
    * ELF — Executable and Linkable Format
    * ELM — Electronic Mail
    * EMACS — Editor Macros
    * EMS — Expanded Memory Specification
    * ENIAC — Electronic Numerical Integrator And Computer
    * EOF — End of File
    * EOL — End of Life
    * EOL — End of Line
    * EOM — End of Message
    * EPROM — Eraseable Programmable Read-Only Memory
    * ERP — Enterprise Resource Planning
    * ESCON — Enterprise Systems Connection
    * ESD — Electrostatic Discharge
    * ETL — Extract, Transform, Load
    * ESR — Eric Steven Raymond
    * EUC — Extended Unix Code
    * EULA — End User License Agreement

F
    * FAP — FORTRAN Assembly Program
    * FAT — File Allocation Table
    * FAQ — Frequently Asked Questions
    * FBDIMM — Fully Buffered Dual Inline Memory Module
    * FC-AL — Fiber Channel Arbitrated Loop
    * FCB — File Control Block
    * FDC — Floppy Disk Controller
    * FDS — Fedora Directory Server
    * FDD — Floppy Disk Drive
    * FDDI — Fiber Distributed Data Interface
    * FDMA — Frequency-Division Multiple Access
    * FEC — Forward Error Correction
    * FEMB — Front-End Motherboard
    * FET — Field Effect Transistor
    * FICON — Fiber Connectivity
    * FIFO — First In First Out
    * FHS — Filesystem Hierarchy Standard
    * FLAC — Free Lossless Audio Codec
    * FLOPS — FLoating-Point Operations Per Second
    * FLOSS — Free/Libre/Open Source Software
    * FOLDOC — Free On-line Dictionary of Computing
    * FOSDEM — Free and Open source Software Developers’ European Meeting
    * FOSI — Formatted Output Specification Instance
    * FOSS — Free and Open Source Software
    * FPGA — Field Programmable Gate Array
    * FPU — Floating Point Unit
    * FS — File System
    * FSB — Front Side Bus
    * FSF — Free Software Foundation
    * FSM — Finite State Machine
    * FTTC — Fiber To The Curb
    * FTTH — Fiber To The Home
    * FTTP — Fiber To The Premises
    * FTP — File Transfer Protocol
    * FQDN — Fully Qualified Domain Name
    * FUCT — Failed Under Continuous Test
    * FUD — Fear Uncertainty Doubt
    * FWS — Folding White Space
    * FXP — File eXchange Protocol

G
    * G11N — Globalization
    * Gb — Gigabit
    * GB — Gigabyte
    * GCC — GNU Compiler Collection (formerly GNU C Compiler)
    * GCJ — GNU Compiler for Java
    * GCR — Group Code Recording
    * GDB — GNU Debugger
    * GDI — Graphics Device Interface
    * GFDL — GNU Free Documentation License
    * GIF — Graphics Interchange Format
    * GIGO — Garbage In, Garbage Out
    * GIMP — GNU Image Manipulation Program
    * GIMPS — Great Internet Mersenne Prime Search
    * GIS — Geographic Information System
    * GLUT — OpenGL Utility Toolkit
    * GNOME — GNU Network Object Model Environment
    * GNU — GNU’s Not Unix
    * GOMS — Goals, Operators, Methods, and Selection rules
    * GPG — GNU Privacy Guard
    * GPGPU — General-Purpose Computing on Graphics Processing Units
    * GPIB — General-Purpose Instrumentation Bus
    * GPL — General Public License
    * GPL — General-Purpose Language
    * GPRS — General Packet Radio Service
    * GPT — GUID Partition Table
    * GPU — Graphics Processing Unit
    * GRUB — Grand Unified Boot-Loader
    * GSM — Global System for Mobile Communications
    * GTK+ — GIMP Toolkit
    * GUI — Graphical User Interface
    * GUID — Globally Unique IDentifier
    * GWT — Google Web Toolkit

H
    * HAL — Hardware Abstraction Layer
    * HBA — Host Bus Adapter
    * HCI — Human Computer Interaction
    * HD — High Density
    * HDD — Hard Disk Drive
    * HD DVD — High Definition DVD
    * HDL — Hardware Description Language
    * HF — High Frequency
    * HHD — Hybrid Hard Drive
    * HID — Human Interface Device
    * HIG — Human Interface Guidelines
    * HIRD — Hurd of Interfaces Representing Depth
    * HMA — High Memory Area
    * HP — Hewlett-Packard
    * HPC — High-Performance Computing
    * HPFS — High Performance File System
    * HSM — Hierarchical Storage Management
    * HT — Hyper Threading
    * HTM — Hierarchical Temporal Memory
    * HTML — Hypertext Markup Language
    * HTTP — Hypertext Transfer Protocol
    * HTTPd — Hypertext Transport Protocol Daemon
    * HTX — HyperTransport eXpansion
    * HURD — Hird of Unix-Replacing Daemons
    * HVD — Holographic Versatile Disc
    * Hz — Hertz

I
    * I2C — Inter-Integrated Circuit
    * I18N — Internationalization
    * IANA — Internet Assigned Numbers Authority
    * iBCS — Intel Binary Compatibility Standard
    * IBM — International Business Machines
    * IC — Integrated Circuit
    * ICANN — Internet Corporation for Assigned Names and Numbers
    * ICE — In-Circuit Emulator
    * ICE — Intrusion Countermeasure Electronics
    * ICMP — Internet Control Message Protocol
    * ICP — Internet Cache Protocol
    * ICT — Information and Communication Technology
    * IDE — Integrated Development Environment
    * IDE — Integrated Drive Electronics
    * IDL — Interface Definition Language
    * IDS — Intrusion Detection System
    * IE — Internet Explorer
    * IEC — International Electrotechnical Commission
    * IEEE — Institute of Electrical and Electronics Engineers
    * IETF — Internet Engineering Task Force
    * IFL — Integrated Facility for Linux
    * IGMP — Internet Group Management Protocol
    * IGRP — Interior Gateway Routing Protocol
    * IHV — Independent Hardware Vendor
    * IIOP — Internet Inter-Orb Protocol
    * IIS — Internet Information Services
    * IM — Instant Messaging
    * IMAP — Internet Message Access Protocol
    * IME — Input Method Editor
    * INFOSEC — Information Systems Security
    * I/O — Input/Output
    * IP — Intellectual Property
    * IP — Internet Protocol
    * IPC — Inter-Process Communication
    * IPL — Initial Program Load
    * IPP — Internet Printing Protocol
    * IPS — Intrusion Prevention System
    * IPsec — Internet Protocol security
    * IPTV — Internet Protocol Television
    * IPX — Internetwork Packet Exchange
    * IRC — Internet Relay Chat
    * IrDA — Infrared Data Association
    * IRP — I/O Request Packet
    * IRQ — Interrupt Request
    * IS — Information Systems
    * ISA — Industry Standard Architecture
    * ISAM — Indexed Sequential Access Method
    * ISC — Internet Storm Center
    * ISDN — Integrated Services Digital Network
    * ISO — International Organization for Standardization
    * ISP — Internet Service Provider
    * ISPF — Interactive System Productivity Facility
    * ISR — Interrupt Service Routine
    * ISV — Independent Software Vendor
    * IT — Information Technology
    * ITL — Interval Temporal Logic
    * ITU — International Telecommunication Union

J
    * J2CE — Java 2 Cryptographic Edition
    * J2EE — Java 2 Enterprise Edition
    * J2ME — Java 2 Micro Edition
    * J2SE — Java 2 Standard Edition
    * JAXB — Java Architecture for XML Binding
    * JAX-RPC — Java XML for Remote Procedure Calls
    * JAXP — Java API for XML Processing
    * JBOD — Just a Bunch of Disks
    * JCL — Job Control Language
    * JCP — Java Community Process
    * JDBC — Java Database Connectivity
    * JDK — Java Development Kit
    * JES — Job Entry Subsystem
    * JDS — Java Desktop System
    * JFC — Java Foundation Classes
    * JFET — Junction Field-Effect Transistor
    * JFS — IBM Journaling Filesystem
    * JINI — Jini Is Not Initials
    * JIT — Just-In-Time
    * JMX — Java Management Extentions
    * JMS — Java Message Service
    * JNDI — Java Naming and Directory Interface
    * JNI — Java Native Interface
    * JPEG — Joint Photographic Experts Group
    * JRE — Java Runtime Environment
    * JS — JavaScript
    * JSON — JavaScript Object Notation
    * JSP — Jackson Structured Programming
    * JSP — JavaServer Pages
    * JTAG — Joint Test Action Group
    * JUG — Java Users Group
    * JVM — Java Virtual Machine
    * jwz — Jamie Zawinski

K
    * K&R — Kernighan and Ritchie
    * KB — Keyboard
    * Kb — Kilobit
    * KB — Kilobyte
    * KB — Knowledge Base
    * KDE — K Desktop Environment
    * kHz — Kilohertz
    * KISS — Keep It Simple, Stupid
    * KVM — Keyboard, Video, Mouse

L
    * L10N — Localization
    * LAMP — Linux Apache MySQL (Perl, PHP, or Python)
    * LAN — Local Area Network
    * LBA — Logical Block Addressing
    * LCD — Liquid Crystal Display
    * LCOS — Liquid Crystal On Silicon
    * LDAP — Lightweight Directory Access Protocol
    * LE — Logical Extents
    * LED — Light-Emitting Diode
    * LF — Line Feed
    * LF — Low Frequency
    * LFS — Linux From Scratch
    * lib — library
    * LIF — Low Insertion Force
    * LIFO — Last In First Out
    * LILO — Linux Loader
    * LKML — Linux Kernel Mailing List
    * LM — LanManager
    * LGPL — [GNU] Lesser General Public License
    * LOC — Lines of Code
    * LPI — Linux Professional Institute
    * LSB — Least Significant Bit
    * LSB — Linux Standard Base
    * LSI — Large-Scale Integration
    * LTL — Linear Temporal Logic
    * LTR — Left-to-Right
    * LUG — Linux User Group
    * LUN — Logical Unit Number
    * LV — Logical Volume
    * LVD — Low Voltage Differential
    * LVM — Logical Volume Management
    * LZW — Lempel-Ziv-Welch

M
    * MAC — Mandatory Access Control
    * MAC — Media Access Control
    * MAN — Metropolitan Area Network
    * MANET — Mobile Ad-Hoc Network
    * MAPI — Messaging Application Programming Interface
    * Mb — Megabit
    * MB — Megabyte
    * MBCS — Multi Byte Character Set
    * MBR — Master Boot Record
    * MCA — Micro Channel Architecture
    * MCSA — Microsoft Certified System Administrator
    * MCSD — Microsoft Certified System Developer
    * MCSE — Microsoft Certified System Engineer
    * MDA — Mail Delivery Agent
    * MDA — Model-Driven Architecture
    * MDA — Monochrome Display Adapter
    * MDI — Multiple Document Interface
    * ME — [Windows] Millennium Edition
    * MF — Medium Frequency
    * MFC — Microsoft Foundation Classes
    * MFM — Modified Frequency Modulation
    * MGPT — Machine Generated Problem Tracking
    * MHz — Megahertz
    * MIB — Management Information Base
    * MICR-Magnetic Ink Character Reader
    * MIDI — Musical Instrument Digital Interface
    * MIMD — Multiple Instruction, Multiple Data
    * MIMO — Multiple-Input Multiple-Output
    * MIPS — Million Instructions Per Second
    * MIPS — Microprocessor without Interlocked Pipeline Stages
    * MIS — Management Information Systems
    * MISD — Multiple Instruction, Single Data
    * MIT — Massachusetts Institute of Technology
    * MIME — Multipurpose Internet Mail Extensions
    * MMDS — Mortality Medical Data System
    * MMI — Man Machine Interface.
    * MMIO — Memory-Mapped I/O
    * MMORPG — Massively Multiplayer Online Role-Playing Game
    * MMU — Memory Management Unit
    * MMX — Multi-Media Extensions
    * MNG — Multiple-image Network Graphics
    * MoBo — Motherboard
    * MOO — MUD Object Oriented
    * MOSFET — Metal-Oxide Semiconductor FET
    * MOTD — Message Of The Day
    * MPAA — Motion Picture Association of America
    * MPEG — Motion Pictures (Coding) Experts Group
    * MPL — Mozilla Public License
    * MPU — Microprocessor Unit
    * MS — Memory Stick
    * MS — Microsoft
    * MSB — Most Significant Bit
    * MS-DOS — Microsoft DOS
    * MT — Machine Translation
    * MTA — Mail Transfer Agent
    * MTU — Maximum Transmission Unit
    * MSA — Mail Submission Agent
    * MSDN — Microsoft Developer Network
    * MSI — Medium-Scale Integration
    * MUA — Mail User Agent
    * MUD — Multi-User Dungeon
    * MVC — Model-View-Controller
    * MVP — Most Valuable Professional
    * MVS — Multiple Virtual Storage
    * MX — Mail exchange

N
    * NACK — Negative ACKnowedgement
    * NAK — Negative AcKnowedgement Character
    * NAS — Network-Attached Storage
    * NAT — Network Address Translation
    * NCP — NetWare Core Protocol
    * NCQ — Native Command Queuing
    * NCSA — National Center for Supercomputing Applications
    * NDPS — Novell Distributed Print Services
    * NDS — Novell Directory Services
    * NEP — Network Equipment Provider
    * NEXT — Near-End CrossTalk
    * NFA — Nondeterministic Finite Automaton
    * GNSCB — Next-Generation Secure Computing Base
    * NFS — Network Filesystem
    * NI — National Instruments
    * NIC — Network Interface Card
    * NIM — No Internal Message
    * NIO — New I/O
    * NIST — National Institute of Standards and Technology
    * NLP — Natural Language Processing
    * NLS — National Language Support
    * NP — Non-Deterministic Polynomial-Time
    * NPL — Netscape Public License
    * NPU — Network Processing Unit
    * NS — Netscape
    * NSA — National Security Agency
    * NSPR — Netscape Portable Runtime
    * NMI — Non-Maskable Interrupt
    * NNTP — Network News Transfer Protocol
    * NOC — Network Operations Center
    * NOP — No OPeration
    * NOS — Network Operating System
    * NPTL — Native POSIX Thread Library
    * NSS — Novell Storage Service
    * NSS — Network Security Services
    * NSS — Name Service Switch
    * NT (Windows) — New Technology
    * NTFS — NT Filesystem
    * NTLM — NT Lan Manager
    * NTP — Network Time Protocol
    * NUMA — Non-Uniform Memory Access
    * NURBS — Nonuniform Rational B-Spline
    * NVRAM — Non-Volatile Random Access Memory

O
    * OASIS — Organization for the Advancement of Structured Information Standards
    * OAT — Operational Acceptance Testing
    * ODBC — Open Database Connectivity
    * OEM — Original Equipment Manufacturer
    * OES — Open Enterprise Server
    * OFTC — Open and Free Technology Community
    * OLAP — Online Analytical Processing
    * OLE — Object Linking and Embedding
    * OLED — Organic Light Emitting Diode
    * OLPC — One Laptop per Child
    * OLTP — Online Transaction Processing
    * OMG — Object Management Group
    * OO — Object-Oriented
    * OO — Open Office
    * OOo — OpenOffice.org
    * OOP — Object-Oriented Programming
    * OPML — Outline Processor Markup Language
    * ORB — Object Request Broker
    * ORM — Oject-Relational Mapping
    * OS — Open Source
    * OS — Operating System
    * OSCON — O’Reilly Open Source Convention
    * OSDN — Open Source Developer Network
    * OSI — Open Source Initiative
    * OSI — Open Systems Interconnection
    * OSPF — Open Shortest Path First
    * OSS — Open Sound System
    * OSS — Open-Source Software
    * OSS — Operational Support Systems
    * OSTG — Open Source Technology Group (formerly OSDN)
    * OUI — Organizationally Unique Identifier

P
    * P2P — Peer-To-Peer
    * PAN — Personal Area Network
    * PAP — Password Authentication Protocol
    * PARC — Palo Alto Research Center
    * PATA — Parallel ATA
    * PC — Personal Computer
    * PCB — Printed Circuit Board
    * PCB — Process Control Block
    * PCI — Peripheral Component Interconnect
    * PCIe — PCI Express
    * PCL — Printer Command Language
    * PCMCIA — Personal Computer Memory Card International Association
    * PCM — Pulse-Code Modulation
    * PCRE — Perl Compatible Regular Expressions
    * PD — Public Domain
    * PDA — Personal Digital Assistant
    * PDF — Portable Document Format
    * PDP — Programmed Data Processor
    * PE — Physical Extents
    * PEBKAC — Problem Exists Between Keyboard And Chair
    * PERL — Practical Extraction and Reporting Language
    * PGA — Pin Grid Array
    * PGP — Pretty Good Privacy
    * PHP — PHP: Hypertext Preprocessor
    * PIC — Peripheral Interface Controller
    * PIC — Programmable Interrupt Controller
    * PID — Proportional-Integral-Derivative
    * PID — Process ID
    * PIM — Personal Information Manager
    * PINE — Program for Internet News & Email
    * PIO — Programmed Input/Output
    * PKCS — Public Key Cryptography Standards
    * PKI — Public Key Infrastructure
    * PLC — Power Line Communication
    * PLC — Programmable Logic Controller
    * PLD — Programmable Logic Device
    * PL/I — Programming Language One
    * PL/M — Programming Language for Microcomputers
    * PL/P — Programming Language for Prime
    * PLT — Power Line Telecoms
    * PMM — Personal Memory Manager
    * PMM — POST Memory Manager
    * PNG — Portable Network Graphics
    * PnP — Plug-and-Play
    * PoE — Power over Ethernet
    * POP — Point of Presence
    * POP3 — Post Office Protocol v3
    * POSIX — Portable Operating System Interface
    * POST — Power-On Self Test
    * PPC — PowerPC
    * PPI — Pixels Per Inch
    * PPP — Point-to-Point Protocol
    * PPPoA — PPP over ATM
    * PPPoE — PPP over Ethernet
    * PPTP — Point-to-Point Tunneling Protocol
    * PS — PostScript
    * PS/2 — Personal System/2
    * PSU — Power Supply Unit
    * PSVI — Post-Schema-Validation Infoset
    * PV — Physical Volume
    * PVG — Physical Volume Group
    * PVR — Personal Video Recorder
    * PXE — Preboot Execution Environment
    * PXI — PCI Extensions for Instrumentation

Q
    * QDR — Quad Data Rate
    * QA — Quality Assurance
    * QFP — Quoted For Permanence.
    * QoS — Quality of Service
    * QOTD — Quote of the Day
    * Qt — Quasar Toolkit
    * QTAM — Queued Telecomunications Acess Method (an IBM OS/360 API)

R
    * RACF — Resource Access Control Facility
    * RAD — Rapid Application Development
    * RADIUS — Remote Authentication Dial In User Service
    * RAID — Redundant Array of Independent Disks
    * RAID — Redundant Array of Inexpensive Disks
    * RAR — Type of archive file run on WinRAR
    * RDM — Relations Database Management
    * RDS — Relations Database System
    * RAIT — Redundant Array of Inexpensive Tapes
    * RAM — Random Access Memory
    * RARP — Reverse Address Resolution Protocol
    * RC — Release Candidate
    * RC — DVD Region Code
    * RC — Run Commands
    * RC — Runtime Configuration
    * RCS — Revision Control System
    * RDBMS — Relational Database Management System
    * RDF — Resource Description Framework
    * REFAL — REcursive Functions Algorithmic Language
    * REST — Representational State Transfer
    * regex — Regular Expression
    * regexp — Regular Expression
    * RF — Radio Frequency
    * RFC — Request For Comments
    * RFI — Radio Frequency Interference
    * RFID — Radio Frequency Identification
    * RGB — Red, Green, Blue
    * RGBA — Red, Green, Blue, Alpha
    * RHL — Red Hat Linux
    * RHEL — Red Hat Enterprise Linux
    * RIA — Rich Internet Application
    * RIAA — Recording Industry Association of America
    * RIP — Raster Image Processor
    * RIP — Routing Information Protocol
    * RISC — Reduced Instruction Set Computer
    * RLE — Run-Length Encoding
    * RLL — Run Length Limited
    * RMI — Remote Method Invocation
    * RMS — Richard Matthew Stallman
    * ROM — Read Only Memory
    * ROMB — Read-Out Motherboard
    * RPC — Remote Procedure Call
    * RPG — Report Program Generator
    * RPM — RPM Package Manager
    * RSA — Rivest Shamir Adleman
    * RSI — Repetitive Strain Injury
    * RSS — Rich Site Summary, RDF Site Summary, or Really Simple Syndication
    * RTC — Real-Time Clock
    * RTE — Real-Time Enterprise
    * RTL — Right-to-Left
    * RTOS — Real Time Operating System
    * RTS — Ready To Send

S
    * SaaS — Software as a Service
    * SAN — Storage Area Network
    * SAR — Search And Replace[1]
    * SATA — Serial ATA
    * SAS — Statistical Analysis System
    * SAX — Simple API for XML
    * SBOD — Spinning Beachball of Death
    * SBP-2 — Serial Bus Protocol 2
    * sbin — superuser binary
    * SBU — Standard Build Unit
    * SCADA — Supervisory Control And Data Acquisition
    * SCID — Source Code in Database
    * SCM — Software Configuration Management
    * SCP — Secure Copy
    * SCPI — Standard Commands for Programmable Instrumentation
    * SCSI — Small Computer System Interface
    * SD — Secure Digital
    * SDDL — Security Descriptor Definition Language
    * SDI — Single Document Interface
    * SDIO — Secure Digital Input Output
    * SDK — Software Development Kit
    * SDL — Simple DirectMedia Layer
    * SDN — Service Delivery Network
    * SDR — Software-Defined Radio
    * SDRAM — Synchronous Dynamic Random Access Memory
    * SDSL — Symmetric DSL
    * SE — Single Ended
    * SEAL — Semantics-directed Environment Adaptation Language
    * SEI — Software Engineering Institute
    * SFTP — Secure FTP
    * SFTP — Simple File Transfer Protocol
    * SFTP — SSH File Transfer Protocol
    * SGI — Silicon Graphics, Incorporated
    * SGML — Standard Generalized Markup Language
    * SHA — Secure Hash Algorithm
    * SIGCAT — Special Interest Group on CD-ROM Applications and Technology
    * SIGGRAPH — Special Interest Group on Graphics
    * SIMD — Single Instruction, Multiple Data
    * SIMM — Single Inline Memory Module
    * SIP — Session Initiation Protocol
    * SIP — Supplementary Ideographic Plane
    * SISD — Single Instruction, Single Data
    * SLED — SUSE Linux Enterprise Desktop
    * SLES — SUSE Linux Enterprise Server
    * SLI — Scalable Link Interface
    * SLIP — Serial Line Internet Protocol
    * SLM — Service Level Management
    * SLOC — Source Lines of Code
    * SPMD — Single Program, Multiple Data
    * SMA — SubMiniature version A
    * SMB — Server Message Block
    * SMBIOS — System Management BIOS
    * SMC — SMC Networks (company)
    * SMIL — Synchronized Multimedia Integration Language
    * S/MIME — Secure/Multipurpose Internet Mail Extensions
    * SMP — Supplementary Multilingual Plane
    * SMP — Symmetric Multi-Processing
    * SMS — Short Message Service
    * SMS — System Management Server
    * SMT — Simultaneous Multithreading
    * SMTP — Simple Mail Transfer Protocol
    * SNA — Systems Network Architecture
    * SNMP — Simple Network Management Protocol
    * SOA — Service-Oriented Architecture
    * SOAP — Simple Object Access Protocol
    * SoC — System-on-a-Chip
    * SO-DIMM — Small Outline DIMM
    * SOHO — Small Office/Home Office
    * SOI — Silicon On Insulator
    * SP — Service Pack
    * SPA — Single Page Application
    * SPF — Sender Policy Framework
    * SPI — Serial Peripheral Interface
    * SPI — Stateful Packet Inspection
    * SPARC — Scalable Processor Architecture
    * SQL — Structured Query Language
    * SRAM — Static Random Access Memory
    * SSD — Software Specification Document
    * SSD – Solid-State Drive
    * SSE — Streaming SIMD Extensions
    * SSH — Secure Shell
    * SSI — Server Side Includes
    * SSI — Single-System Image
    * SSI — Small-Scale Integration
    * SSID — Service Set Identifier
    * SSL — Secure Socket Layer
    * SSP — Supplementary Special-purpose Plane
    * SSSE — Supplementary Streaming SIMD Extensions
    * su — superuser
    * SUS — Single UNIX Specification
    * SVC — Scalable Video Coding
    * SVG — Scalable Vector Graphics
    * SVGA — Super Video Graphics Array
    * SVD — Structured VLSI Design
    * SWT — Stardard Widget Toolkit
    * Sysop — System operator

T
    * TAO — Track-At-Once
    * TB — Terabyte
    * Tcl — Tool Command Language
    * TCP — Transmission Control Protocol
    * TCP/IP — Transmission Control Protocol/Internet Protocol
    * TCU — Telecommunication Control Unit
    * TDMA — Time Division Multiple Access
    * temp — temporary (variable, file, directory, etc.)
    * TFT — Thin Film Transistor
    * TI — Texas Instruments
    * TLA — Three-Letter Acronym
    * TLD — Top-Level Domain
    * TLS — Thread-Local Storage
    * TLS — Transport Layer Security
    * tmp — temporary (variable, file, directory, etc.)
    * TNC — Terminal Node Controller
    * TNC — Threaded Neill-Concelman connector
    * TSO — Time Sharing Option
    * TSP — Traveling Salesman Problem
    * TSR — Terminate and Stay Resident
    * TTA — True Tap Audio
    * TTF — TrueType Font
    * TTL — Transistor-Transistor Logic
    * TTL — Time To Live
    * TTS — Text-to-Speech
    * TTY — Teletype
    * TUCOWS — The Ultimate Collection of Winsock Software
    * TUG — TeX Users Group

U
    * UAAG — User Agent Accessibility Guidelines
    * UAC — User Account Control
    * UART — Universal Asynchronous Receiver Transmitter
    * UAT — User Acceptance Testing
    * UCS — Universal Character Set
    * UDDI — Universal Description, Discovery, and Integration
    * UDMA — Ultra DMA
    * UDP — User Datagram Protocol
    * UE — User Experience
    * UEFI — Unified Extensible Firmware Interface
    * UHF — Ultra High Frequency
    * UI — User Interface
    * UL — Upload
    * ULA — Uncommitted Logic Array
    * UMA — Upper Memory Area
    * UMB — Upper Memory Block
    * UML — Unified Modeling Language
    * UML — User-Mode Linux
    * UMPC — Ultra-Mobile Personal Computer
    * UNC — Universal Naming Convention
    * UPS — Uninterruptible Power Supply
    * URI — Uniform Resource Identifier
    * URL — Uniform Resource Locator
    * URN — Uniform Resource Name
    * USB — Universal Serial Bus
    * usr — user
    * USR — U.S. Robotics
    * UTC — Coordinated Universal Time
    * UTF — Unicode Transformation Format
    * UUCP — Unix to Unix Copy
    * UUID — Universally Unique Identifier
    * UVC — Universal Virtual Computer

V
    * var — variable
    * VAX — Virtual Address eXtension
    * VCPI — Virtual Control Program Interface
    * VR — Virtual Reality
    * VRML — Virtual Reality Modeling Language
    * VB — Visual Basic
    * VBA — Visual Basic for Applications
    * VBS — Visual Basic Script
    * VESA — Video Electronics Standards Association
    * VFAT — Virtual FAT
    * VFS — Virtual File System
    * VG — Volume Group
    * VGA — Video Graphics Array
    * VGCT – Video Graphics Character Table
    * VHF — Very High Frequency
    * VLAN — Virtual Local Area Network
    * VLSM — Variable Length Subnet Mask
    * VLB — Vesa Local Bus
    * VLF — Very Low Frequency
    * VLIW – Very Long Instruction Word
    * VLSI — Very-Large-Scale Integration
    * VM — Virtual Machine
    * VM — Virtual Memory
    * VOD — Video On Demand
    * VoIP — Voice over IP
    * VPN — Virtual Private Network
    * VPU — Visual Processing Unit
    * VSAM — Virtual Storage Access Method
    * VSAT — Very Small Aperture Terminal
    * VT — Video Terminal?
    * VTAM — Virtual Telecommunications Access Method

W
    * W3C — World Wide Web Consortium
    * WAFS — Wide Area File Services
    * WAI — Web Accessibility Initiative
    * WAIS — Wide Area Information Server
    * WAN — Wide Area Network
    * WAP — Wireless Access Point
    * WAP — Wireless Application Protocol
    * WAV — WAVEform audio format
    * WBEM — Web-Based Enterprise Management
    * WCAG — Web Content Accessibility Guidelines
    * WCF — Windows Communication Foundation
    * WDM — Wavelength Division Multiplexing
    * WebDAV — WWW Distributed Authoring and Versioning
    * WEP — Wired Equivalent Privacy
    * Wi-Fi — Wireless Fidelity
    * WiMAX — Worldwide Interoperability for Microwave Access
    * WinFS — Windows Future Storage
    * WINS- Windows Internet Naming Service
    * WLAN — Wireless Local Area Network
    * WMA — Windows Media Audio
    * WMV — Windows Media Video
    * WOL — Wake-on-LAN
    * WOM — Wake-on-Modem
    * WOR — Wake-on-Ring
    * WPA — Wi-Fi Protected Access
    * WPAN — Wireless Personal Area Network
    * WPF — Windows Presentation Foundation
    * WSDL — Web Services Description Language
    * WSFL — Web Services Flow Language
    * WUSB — Wireless Universal Serial Bus
    * WWAN — Wireless Wide Area Network
    * WWID — World Wide Identifier
    * WWN — World Wide Name
    * WWW — World Wide Web
    * WYSIWYG — What You See Is What You Get
    * WZC — Wireless Zero Configuration

X
    * XAG — XML Accessibility Guidelines
    * XAML — eXtensible Application Markup Language
    * XDM — X Window Display Manager
    * XDMCP — X Display Manager Control Protocol
    * XCBL — XML Common Business Library
    * XHTML — eXtensible Hypertext Markup Language
    * XILP — XILP Internet Links People
    * XML — eXtensible Markup Language
    * XMMS — X Multimedia System
    * XMPP — eXtensible Messaging and Presence Protocol
    * XMS — Extended Memory Specification
    * XNS — Xerox Network Services
    * XP — Cross-Platform
    * XP — Extreme Programming
    * XPCOM — Cross Platform Component Object Model
    * XPI — Cross Platform Installer
    * XPIDL — Cross Platform IDL
    * XSD — XML Schema Definition
    * XSL — eXtensible Stylesheet Language
    * XSL-FO — eXtensible Stylesheet Language Formatting Objects
    * XSLT — XSL Transformations
    * XSS — Cross-Site Scripting
    * XTF — Extensible Tag Framework
    * XUL — XML-based User-interface Language

Y
    * Y2K — Year Two Thousand
    * YACC — Yet Another Compiler Compiler
    * YAML — YAML Ain’t Markup Language
    * YAST — Yet Another Setup Tool

Z
    * ZCAV — Zone Constant Angular Velocity
    * ZCS — Zero Code Suppression
    * ZIF — Zero Insertion Force
    * ZIFS — Zero Insertion Force Socket
    * ZISC — Zero Instruction Set Computer
    * ZOPE — Z Object Publishing Environment
    * ZMA — Zone Multicast Address

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