cybersecurity_acronyms

Cybersecurity acronyms
0–9
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
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T
U
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X
Y
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See also
References
External links

Cybersecurity acronyms

Return to Cybersecurity terminology or Acronyms or List of computing and IT abbreviations

This is a list of computing and IT acronyms and IT abbreviations.

0–9

Multi-factor authentication | 2FA—Two-factor authentication

A

AAA protocol | AAA—Authentication Authorization, Accounting
ACID—Atomicity Consistency Isolation Durability
Acknowledge character | ACK—ACKnowledgement
Access control list | ACL—Access Control List
Advanced Configuration and Power Interface | ACPI—Advanced Configuration and Power Interface
Active Directory | AD—Active Directory
Administrative domain | AD—Administrative Domain
Advanced Data Communication Control Procedures | ADCCP—Advanced Data Communications Control Procedures
Advanced Encryption Standard | AES—Advanced Encryption Standard
Anisotropic filtering | AF—Anisotropic Filtering
Artificial intelligence | AI—Artificial Intelligence
Access list | AL—Access List
Access method | AM—Access Method
American National Standards Institute | ANSI—American National Standards Institute
Application Layer | APCI—Application-Layer Protocol Control Information
Application programming interface | API—Application Programming Interface
Zero configuration networking | APIPA—Automatic Private IP Addressing
American Registry for Internet Numbers | ARIN—American Registry for Internet Numbers
Address Resolution Protocol | ARP—Address Resolution Protocol
.arpa | ARPA—Address and Routing Parameter Area
Advanced Research Projects Agency | ARPA—Advanced Research Projects Agency
Network access server | AS—Access Server
AuthIP—Authenticated Internet Protocol
Automated Security Enhancement Tool | ASET—Automated Security Enhancement Tool
Application-specific integrated circuit | ASIC—Application-Specific Integrated Circuit
Application service provider | ASP—Application Service Provider
Access time | AT—Access Time
Antivirus software | AV—Antivirus

B

Block availability map | BAM—Block Availability Map
Business Continuity | BC—Business Continuity
Boot Configuration Data | BCD—Boot Configuration Data
Byzantine fault tolerance | BFT—Byzantine Fault Tolerant
Business intelligence | BI—Business Intelligence
BIND—Berkeley Internet Name Domain
Blog—Web Log
Basic Multilingual Plane | BMP—Basic Multilingual Plane
BNC connector | BNC—Bayonet Neill-Concelman
Berkeley Open Infrastructure for Network Computing | BOINC—Berkeley Open Infrastructure for Network Computing
Byte order mark | BOM—Byte Order Mark
Bootstrap Protocol | BOOTP—Bootstrap Protocol
BPDU—Bridge Protocol Data Unit
Business Process Execution Language | BPEL—Business Process Execution Language
Power line communication | BPL—Broadband over Power Lines
Business Process Management | BPM—Business Process Management
Business process modeling | BPM—Business Process Modeling
bit rate | bps—bits per second
Business reference model | BRM—Business Reference Model
Business rule management system | BRMS—Business Rule Management System
Business Readiness Rating | BRR—Business Readiness Rating
Multichannel Multipoint Distribution Service | BRS—Broadband Radio Service
Business Software Alliance | BSA—Business Software Alliance
Back-side bus | BSB—Backside Bus
Berkeley Software Distribution | BSD—Berkeley Software Distribution
Blue Screen of Death | BSoD—Blue Screen of Death
.bss | BSS—Block Started by Symbol
BitTorrent (protocol) | BT—BitTorrent
Bluetooth | BT—Bluetooth
Basic telecommunications access method | B TAM—Basic Telecommunications Access Method
Bandwidth (computing) | BW—Bandwidth
Bring your own device | BYOD—Bring Your Own Device
Byte—By eight (group of 8 bits)

C

Computer architecture | CA—Computer Accountancy
Computer-aided design | CAD—Computer-Aided Design
Computer-aided engineering | CAE—Computer-Aided Engineering
Computer-aided industrial design | CAID—Computer-Aided Industrial Design
E-learning | CAI—Computer-Aided Instruction
Computer-aided manufacturing | CAM—Computer-Aided Manufacturing
CAPTCHA—Completely Automated Public Turing Test to tell Computers and Humans Apart
Computer-assisted translation | CAT—Computer-Aided Translation
Computer-aided quality | CAQ—Computer-Aided Quality Assurance
Computer-aided software engineering | CASE—Computer-Aided Software Engineering
GNU Compiler Collection | cc—C Compiler
Compact Disc | CD—Compact Disc
Common Desktop Environment | CDE—Common Desktop Environment
Compact Disk File System | CDFS—Compact Disk File System
Code division multiple access | CDMA—Code Division Multiple Access
Content delivery network | CDN—Content Delivery Network
Cisco Discovery Protocol | CDP—Cisco Discovery Protocol
Continuous data protection | CDP—Continuous Data Protection
CD-R—CD-Recordable
CD-ROM—CD Read-Only Memory
CD-RW—CD-Rewritable
Security architecture | CDSA—Common Data Security Architecture
Computer Emergency Response Team | CERT—Computer Emergency Response Team
Consumer Electronics Show | CES—Consumer Electronics Show
Compact Flash | CF—Compact Flash
Computational fluid dynamics | CFD—Computational Fluid Dynamics
Context-free grammar | CFG—Context-Free Grammar
Control flow graph | CFG—Control Flow Graph
Computer graphics | CG—Computer Graphics
Color Graphics Adapter | CGA—Color Graphics Array
Common Gateway Interface | CGI—Common Gateway Interface
Computer-generated imagery | CGI—Computer-Generated Imagery
Graph theory | CGT—Computational Graph Theory
Challenge-handshake authentication protocol | CHAP—Challenge-Handshake Authentication Protocol
Cylinder-head-sector | CHS—Cylinder-Head-Sector
Classless Inter-Domain Routing | CIDR—Classless Inter-Domain Routing
Server Message Block | CIFS—Common Internet Filesystem
Common Information Model (computing) | CIM—Common Information Model
Computationally Independent Model | CIM—Computationally Independent Model
Chief information officer | CIO—Chief Information Officer
Committed information rate | CIR—Committed information rate
Complex instruction set computer | CISC—Complex Instruction Set Computer
CJK characters | CJK—Chinese, Japanese, and Korean
CJKV—Chinese, Japanese, Korean, and Vietnamese
Command-line interface | CLI—Command Line Interface
Common Language Runtime | CLR—Common Language Runtime
Configuration management | CM—Configuration Management
Content management | CM—Content Management
Configuration management database | CMDB—Configuration Management Database
Capability Maturity Model Integration | CMMI—Capability Maturity Model Integration
CMOS—Complementary Metal-Oxide Semiconductor
Current Mode of Operation | CMO—Current Mode of Operation
Content management system | CMS—Content Management System
Active Directory | CN—Canonical Name
Lightweight Directory Access Protocol | CN—Common Name
CNC—Computer Numerical Control
Cryptographic Next Generation | CNG—Cryptographic Next Generation
Cryptography Next Generation | CNG—Cryptography Next Generation
Communications and Networking Riser | CNR—Communications and Networking Riser
COBOL—Common Business-Oriented Language
Component Object Model | COM—Component Object Model or communication
Common Object Request Broker Architecture | CORBA—Common Object Request Broker Architecture
Commercial off-the-shelf | COTS—Commercial Off-The-Shelf
Cell (microprocessor) | CPA—Cell Processor Architecture
CPAN—Comprehensive Perl Archive Network
CP/M—Control Program/Monitor
Common Public Radio Interface | CPRI—Common Public Radio Interface
Characters Per Second | CPS—characters per second
Central processing unit | CPU—Central Processing Unit
Carriage return | CR—Carriage Return
R (programming language) | CRAN—Comprehensive R Archive Network
Cyclic redundancy check | CRC—Cyclic Redundancy Check
Newline | CRLF—Carriage Return Line Feeds
Customer relationship management | CRM—Customer Relationship Management
Computer reservations system | CRS—Computer Reservations System
Cathode ray tube | CRT—Cathode Ray Tube
Create, read, update and delete | CRUD—Create, Read, Update and Delete
AT Attachment | CS—Cable Select
Computer science | CS—Computer Science
Computer Science and Engineering | CSE—Computer Science and Engineering
Common System Interface | CSI—Common System Interface
Compatibility Support Module | CSM—Compatibility Support Module
Carrier sense multiple access with collision detection | CSMA/CD—Carrier sense multiple access with collision detection
Cloud service provider | CSP—Cloud Service Provider
Communicating sequential processes | CSP—Communicating Sequential Processes
Cross-site request forgery | CSRF—Cross-Site Request Forgery
Cascading Style Sheets | CSS—Cascading Style Sheets
Content Scramble System | CSS—Content-Scrambling System
Closed source | CSS—Closed Source Software
Cross-site scripting | CSS—Cross-Site Scripting
Comma-separated values | CSV—Comma-Separated Values
Computed axial tomography | CT—Computerized Tomography
CTAN—Comprehensive TeX Archive Network
Client-to-client protocol | CTCP—Client-To-Client Protocol
Computer telephony integration | CTI—Computer Telephony Integration
Compile time function execution | CTFE—Compile Time Function Execution
Computation tree logic | CTL—Computational Tree Logic
Close to Metal | CTM—Close To Metal
Flow control (data) | CTS—Clear To Send
Compatible Time-Sharing System | CTSS—Compatible Time-Sharing System
IBM Common User Access | CUA—Common User Access
Concurrent Versions System—Concurrent Versioning System]] | CVS * [[Concurrent Versions System | CVS—Concurrent Versioning System

D

Digital-to-analog converter | DAC—Digital-To-Analog Converter
Discretionary access control | DAC—Discretionary Access Control
Database Abstraction Layer | DAL—Database Abstraction Layer
Data access object | DAO—Data Access Object
Data Access Objects | DAO—Data Access Objects
Optical disc recording modes | DAO—Disk-At-Once
Directory Access Protocol | DAP—Directory Access Protocol
DARPA—Defense Advanced Research Projects Agency
Digital Audio Tape | DAT—Digital Audio Tape
Database | DB—Database
Database administrator | DBA—Database Administrator
DBCS—Double Byte Character Set
Database management system | DBMS—Database Management System
Direct Client-to-Client | DCC—Direct Client-to-Client
Datagram Congestion Control Protocol | DCCP—Datagram Congestion Control Protocol
DCC Alliance | DCCA—Debian Common Core Alliance
Data Control Language | DCL—Data Control Language
Distributed Control System | DCS—Distributed Control System
Dublin Core | DCMI—Dublin Core Metadata Initiative
Distributed Component Object Model | DCOM—Distributed Component Object Model
Double density | DD—Double Density
Dynamic Data Exchange | DDE—Dynamic Data Exchange
DNS DHCP IP Address management | DDI—DNS DHCP & IP Address management
Data Definition Language | DDL—Data Definition Language
DDoS—Distributed Denial of Service
DDR SDRAM | DDR—Double Data Rate
Digital Equipment Corporation | DEC—Digital Equipment Corporation
Data Encryption Standard | DES—Data Encryption Standard
/dev | dev—development
Deterministic finite automaton | DFA—Deterministic Finite Automaton
Data flow diagram | DFD—Data Flow Diagram
Depth-first search | DFS—Depth-First Search
Distributed file system | DFS—Distributed File System
Dworkin's Game Driver | DGD—Dworkin's Game Driver
Dynamic Host Configuration Protocol | DHCP—Dynamic Host Configuration Protocol
Dynamic HTML | DHTML—Dynamic Hypertext Markup Language
Data Integrity Field | DIF—Data Integrity Field
DIMM—Dual Inline Memory Module
Deutsches Institut für Normung | DIN—Deutsches Institut für Normung
Dual in-line package | DIP—Dual In-line Package
DISM—Deployment Image and Service Management Tool
DIVX (Digital Video Express) | DIVX—Digital Video Express
DomainKeys Identified Mail | DKIM—Domain Keys Identified Mail
Download | DL—Download
Dynamic-link library | DLL—Dynamic Link Library
Digital Living Network Alliance | DLNA—Digital Living Network Alliance
Data loss protection | DLP—Data loss protection
Direct memory access | DMA—Direct Memory Access
Digital Millennium Copyright Act | DMCA—Digital Millennium Copyright Act
Direct Media Interface | DMI—Direct Media Interface
Data Manipulation Language | DML—Data Manipulation Language
Definitive Media Library | DML—Definitive Media Library
Dennis Ritchie | DMR—Dennis M. Ritchie
DMZ (computing) | DMZ—Demilitarized Zone
Lightweight Directory Access Protocol | DN—Distinguished Name
Drag-and-drop | DND—Drag-and-Drop
Domain Name System | DNS—Domain Name System
Dead on arrival | DOA—Dead on Arrival
DOCSIS—Data Over Cable Service Interface Specification
Document Object Model | DOM—Document Object Model
Denial-of-service attack | DoS—Denial of Service
DOS—Disk Operating System
Dot pitch | DP—Dot Pitch
Deferred Procedure Call | DPC—Deferred Procedure Call
Deep packet inspection | DPI—Deep Packet Inspection
Dots per inch | DPI—Dots Per Inch
DOS Protected Mode Interface | DPMI—DOS Protected Mode Interface
VESA Display Power Management Signaling | DPMS—Display Power Management Signaling
Disaster recovery | DR—Disaster Recovery
Dynamic random-access memory | DRAM—Dynamic Random-Access Memory
DR-DOS—Digital Research - Disk Operating System
Direct Rendering Infrastructure | DRI—Direct Rendering Infrastructure
Digital rights management | DRM—Digital Rights Management
Direct Rendering Manager | DRM—Direct Rendering Manager
Digital Signature Algorithm | DSA—Digital Signature Algorithm
Document Schema Definition Languages | DSDL—Document Schema Definition Languages
Dynamic Systems Development Method | DSDM—Dynamic Systems Development Method
Digital subscriber line | DSL—Digital Subscriber Line
Domain-specific language | DSL—Domain-Specific Language
Digital subscriber line access multiplexer | DSLAM—Digital Subscriber Line Access Multiplexer
Database Source Name | DSN—Database Source Name
Data set (IBM mainframe) | DSN—Data Set Name
Digital signal processor | DSP—Digital Signal Processor
Document Style Semantics and Specification Language | DSSSL—Document Style Semantics and Specification Language
Document Type Definition | DTD—Document Type Definition
Data terminal equipment | DTE—Data Terminal Equipment or data transfer rate
Desktop publishing | DTP—Desktop Publishing
RS-232 | DTR—Data Terminal Ready or Data transfer rate
DVD—Digital Versatile Disc
DVD-R—DVD-Recordable
DVD-ROM—DVD-Read Only Memory
DVD-RW—DVD-Rewritable
Digital Visual Interface | DVI—Digital Visual Interface
Digital video recorder | DVR—Digital Video Recorder
Data Warehouse | DW—Data Warehouse

E

Enterprise application integration | EAI—Enterprise Application Integration
Extensible Authentication Protocol | EAP—Extensible Authentication Protocol
Exchange ActiveSync | EAS—Exchange ActiveSync
Extended Binary Coded Decimal Interchange Code | EBCDIC—Extended Binary Coded Decimal Interchange Code
Extensible Binary Meta Language | EBML—Extensible Binary Meta Language
Elliptic curve cryptography | ECC—Elliptic Curve Cryptography
Ecma International | ECMA—European Computer Manufacturers Association
Explicit Congestion Notification | ECN—Explicit Congestion Notification
eCos | ECOS—Embedded Configurable Operating System
Expense and Cost Recovery System (ECRS) | ECRS—Expense and Cost Recovery System
Electronic design automation | EDA—Electronic Design Automation
Enhanced Data Rates for GSM Evolution | EDGE— Enhanced Data rates for GSM Evolution
Electronic Data Interchange | EDI—Electronic Data Interchange
Dynamic random access memory | EDO—Extended Data Out
Electronic Delay Storage Automatic Calculator | EDSAC—Electronic Delay Storage Automatic Calculator
EDVAC—Electronic Discrete Variable Automatic Computer
EEPROM—Electronically Erasable Programmable Read-Only Memory
Electronic Frontier Foundation | EFF—Electronic Frontier Foundation
Extensible Firmware Interface | EFI—Extensible Firmware Interface
Eight-to-fourteen modulation | EFM—Eight-to-Fourteen Modulation
Ethernet in the First Mile | EFM—Ethernet in the First Mile
Encrypting File System | EFS—Encrypting File System
Enhanced Graphics Adapter | EGA—Enhanced Graphics Array
Electronic mail | E-mail—Electronic mail
Exterior Gateway Protocol | EGP—Exterior Gateway Protocol
Electronic identity card | eID—electronic ID card
EIDE—Enhanced IDE
Enhanced Interior Gateway Routing Protocol | EIGRP—Enhanced Interior Gateway Routing Protocol
Extended Industry Standard Architecture | EISA—Extended Industry Standard Architecture
Extremely low frequency | ELF—Extremely Low Frequency
Executable and Linkable Format | ELF—Executable and Linkable Format
Elm (e-mail client) | ELM—ELectronic Mail
Emacs | EMACS—Editor MACroS
Expanded memory | EMS—Expanded Memory Specification
ENIAC—Electronic Numerical Integrator And Computer
End-of-Day | EOD—End of Day
End-of-file | EOF—End of File
Newline | EOL—End of Line
End of Message | EOM—End Of Message
End of Support | EOS—End OF Support
Explicitly parallel instruction computing | EPIC—Explicitly Parallel Instruction Computing
EPROM—Erasable Programmable Read-Only Memory
Entity-relationship diagram | ERD—Entity-Relationship Diagram
Entity-relationship model | ERM—Entity-Relationship Model
Enterprise resource planning | ERP—Enterprise Resource Planning
external SATA | eSATA—external SATA
Enterprise service bus | ESB—Enterprise service bus
ESCON—Enterprise Systems Connection
Electrostatic discharge | ESD—Electrostatic Discharge
Eric S. Raymond | ESR—Eric Steven Raymond
Extract, transform, load | ETL—Extract, Transform, Load
Event Tracing for Windows | ETW—Event Tracing for Windows
Extended Unix Code | EUC—Extended Unix Code
End user license agreement | EULA—End User License Agreement
Extended Window Manager Hints | EWMH—Extended Window Manager Hints
Extended file system | EXT—EXTended file system

F

FORTRAN Assembly Program | FAP—FORTRAN Assembly Program
FASM—Flat ASseMbler
File Allocation Table | FAT—File Allocation Table
FAQ—Frequently Asked Questions
Fully Buffered DIMM | FBDIMM—Fully Buffered Dual Inline Memory Module
FC-AL—Fibre Channel Arbitrated Loop
File control block | FCB—File Control Block
Frame check sequence | FCS—Frame Check Sequence
Floppy disk controller | FDC—Floppy Disk Controller
Fedora Directory Server | FDS—Fedora Directory Server
Frequency-division multiple access | FDD—Frequency-Division Duplexing
Floppy disk drive | FDD—Floppy Disk Drive
Fiber distributed data interface | FDDI—Fiber Distributed Data Interface
Frequency-division multiplexing | FDM—Frequency-Division Multiplexing
Frequency-division multiple access | FDMA—Frequency-Division Multiple Access
Forward error correction | FEC—Forward Error Correction
S-LINK | FEMB—Front-End Motherboard
Field-effect transistor | FET—Field Effect Transistor
Filesystem Hierarchy Standard | FHS—Filesystem Hierarchy Standard
FICON—FIber CONnectivity
FIFO (computing and electronics) | FIFO—First In First Out
FIPS 140 | FIPS—Federal Information Processing Standards
FL (programming language) | FL—Function Level
Free Lossless Audio Codec | FLAC—Free Lossless Audio Codec
FLOPS—FLoating-Point Operations Per Second
Free and open source software | FLOSS—Free/Libre/Open Source Software
Fixed Mobile Convergence | FMC— Fixed Mobile Convergence “Mobile UC or Unified Communications over Wireless”
Future Mode of Operation | FMO—Future Mode of Operation
Free On-line Dictionary of Computing | FOLDOC—Free On-line Dictionary of Computing
FOSDEM—Free and Open source Software Developers' European Meeting
Formatting Output Specification Instance | FOSI—Formatted Output Specification Instance
Free and open source software | FOSS—Free and Open Source Software
FP (programming language) | FP—Function Programming
Field-programmable gate array | FPGA—Field Programmable Gate Array
Floating Point Systems | FPS—Floating Point Systems
Floating-point unit | FPU—Floating Point Unit
Field-replaceable unit | FRU—Field Replaceable Unit
File system | FS—File System
Front-side bus | FSB—Front Side Bus
fsck—File System Check
Free Software Foundation | FSF—Free Software Foundation
Finite-state machine | FSM—Finite State Machine
Fiber to the Antenna | FTTA—Fiber To The Antenna
Fiber to the Curb | FTTC—Fiber To The Curb
Fiber to the home | FTTH—Fiber To The Home
Fiber to the premises | FTTP—Fiber To The Premises
File Transfer Protocol | FTP—File Transfer Protocol
Fully qualified domain name | FQDN—Fully Qualified Domain Name
Fear, uncertainty and doubt | FUD—Fear Uncertainty Doubt
Whitespace (computer science) | FWS—Folding White Space
File eXchange Protocol | FXP—File eXchange Protocol
For Your Information | FYI—For Your Information
FVEK—Full Volume Encryption Key

G

Globalization | G11N—Globalization
GNU Assembler | Gas—GNU Assembler
Gigabit | Gb—Gigabit
Gigabyte | GB—Gigabyte
GNU Compiler Collection | GCC—GNU Compiler Collection
GNU Compiler for Java | GCJ—GNU Compiler for Java
Group coded recording | GCR—Group Coded Recording
GNU Debugger | GDB—GNU Debugger
Graphics Device Interface | GDI—Graphics Device Interface
GNU Free Documentation License | GFDL—GNU Free Documentation License
Graphics Interchange Format | GIF—Graphics Interchange Format
Garbage In, Garbage Out | GIGO—Garbage In, Garbage Out
GIMP—GNU Image Manipulation Program
Great Internet Mersenne Prime Search | GIMPS—Great Internet Mersenne Prime Search
Geographic information system | GIS—Geographic Information System
OpenGL Utility Toolkit | GLUT—OpenGL Utility Toolkit
Geography Markup Language | GML—Geography Markup Language
GNOME—GNU Network Object Model Environment
GUI-Graphical User Interfase
GNU—GNU's Not Unix
GOMS—Goals, Operators, Methods, and Selection rules
GPUTILS | GPASM—GNU PIC ASseMbler
IBM General Parallel File System | GPFS—General Parallel File System
GNU Privacy Guard | GPG—GNU Privacy Guard
GPGPU—General-Purpose Computing on Graphics Processing Units
GPIB—General-Purpose Instrumentation Bus
GNU General Public License | GPL—General Public License
Domain-specific language | GPL—General-Purpose Language
General Packet Radio Service | GPRS—General Packet Radio Service
GUID Partition Table | GPT—GUID Partition Table
Graphics processing unit | GPU—Graphics Processing Unit
GNU GRUB | GRUB—Grand Unified Boot-Loader
GERAN—GSM EDGE Radio Access Network
GSM—Global System for Mobile Communications
GTK+—GIMP Toolkit
Graphical user interface | GUI—Graphical User Interface
Globally Unique Identifier | GUID—Globally Unique IDentifier
Google Web Toolkit | GWT—Google Web Toolkit
IT Networking Services | GYR—IT Networking

H

High availability | HA—High Availability
Hardware abstraction layer | HAL—Hardware Abstraction Layer
HTML Application Rapid Development | HARD—HTML Application Rapid Development
Houston Automatic Spooling Priority | HASP—Houston Automatic Spooling Priority
Host adapter | HBA—Host Bus Adapter
Human–computer interaction | HCI—Human Computer Interaction
High density | HD—High Density
Hard disk drive | HDD—Hard Disk Drive
Hardware compatibility list | HCL—Hardware Compatibility List
HD DVD—High Definition DVD
Hardware description language | HDL—Hardware Description Language
HDMI—High-Definition Multimedia Interface
HECI—Host Embedded Controller Interface
High frequency | HF—High Frequency
Hierarchical File System | HFS—Hierarchical File System
Hybrid drive | HHD—Hybrid Hard Drive
Human interface device | HID—Human Interface Device
Human interface guidelines | HIG—Human Interface Guidelines
GNU Hurd | HIRD—Hurd of Interfaces Representing Depth
IBM High-Level Assembler | HLASM—High Level ASseMbler
HTTP Live Streaming | HLS—HTTP Live Streaming
High memory area | HMA—High Memory Area
Hewlett-Packard | HP—Hewlett-Packard
High-performance computing | HPC—High-Performance Computing
High Performance File System | HPFS—High Performance File System
High-Speed Downlink Packet Access | HSDPA—High-Speed Downlink Packet Access
High-throughput computing | HTC—High-Throughput Computing
Hierarchical storage management | HSM—Hierarchical Storage Management
Hyper-threading | HT—Hyper Threading
Hierarchical temporal memory | HTM—Hierarchical Temporal Memory
HTML—Hypertext Markup Language
Hypertext Transfer Protocol | HTTP—Hypertext Transfer Protocol
Daemon (computer software) | HTTPd—Hypertext Transport Protocol Daemon
HTTPS—HTTP Secure
HyperTransport | HTX—HyperTransport eXpansion
GNU Hurd | HURD—Hird of Unix-Replacing Daemons
Holographic Versatile Disc | HVD—Holographic Versatile Disc
Hertz | Hz—Hertz

I

I²C—Inter-Integrated Circuit
I²S—Integrated Interchip Sound
Internationalization and localization | I18N—Internationalization
Internet Assigned Numbers Authority | IANA—Internet Assigned Numbers Authority
Application binary interface | iBCS—Intel Binary Compatibility Standard
IBM—International Business Machines
Integrated circuit | IC—Integrated Circuit
ICANN—Internet Corporation for Assigned Names and Numbers
In-circuit emulator | ICE—In-Circuit Emulator
Intrusion Countermeasures Electronics | ICE—Intrusion Countermeasure Electronics
I/O Controller Hub | ICH—I/O Controller Hub
Internet Control Message Protocol | ICMP—Internet Control Message Protocol
Internet Cache Protocol | ICP—Internet Cache Protocol
Internet Connection Sharing | ICS—Internet Connection Sharing
Information technology | ICT—Information and Communication Technology
Integrated development environment | IDE—Integrated Development Environment
Advanced Technology Attachment | IDE—Integrated Drive Electronics
Intermediate distribution frame | IDF—Intermediate Distribution Frame
Intermediate Data Format | IDF—Intermediate Data Format
IDL (programming language) | IDL—Interactive Data Language
Interface description language | IDL—Interface Definition Language
Intrusion detection system | IDS—Intrusion Detection System
Internet Explorer | IE—Internet Explorer
International Electrotechnical Commission | IEC—International Electrotechnical Commission
Institute of Electrical and Electronics Engineers | IEEE—Institute of Electrical and Electronics Engineers
Internet Engineering Task Force | IETF—Internet Engineering Task Force
IFGICT—International Federation of Global & Green ICT
Integrated Facility for Linux | IFL—Integrated Facility for Linux
Internet Group Management Protocol | IGMP—Internet Group Management Protocol
Interior Gateway Routing Protocol | IGRP—Interior Gateway Routing Protocol
Independent hardware vendor | IHV—Independent Hardware Vendor
General Inter-ORB Protocol | IIOP—Internet Inter-Orb Protocol
Internet Information Services | IIS—Internet Information Services
Internet Key Exchange | IKE—Internet Key Exchange
Intermediate language | IL—Intermediate Language
Instant messaging | IM—Instant Messaging
Internet Message Access Protocol | IMAP—Internet Message Access Protocol
Input method editor | IME—Input Method Editor
Information security | INFOSEC—Information Systems Security
Input/output | I/O—Input/output
Internet of Things | IoT—Internet of Things
Intellectual property | IP—Intellectual Property
Internet Protocol | IP—Internet Protocol
IP address management | IPAM—IP Address Management
Inter-process communication | IPC—Inter-Process Communication
Initial Program Load | IPL—Initial Program Load
Intelligent Platform Management Interface | IPMI—Intelligent Platform Management Interface
Interprocedural optimization | IPO—Inter Procedural Optimization
Internet Printing Protocol | IPP—Internet Printing Protocol
IPS panel | IPS—In-Plane Switching
Instructions per second | IPS—Instructions Per Second
Intrusion prevention system | IPS—Intrusion Prevention System
IPsec—Internet Protocol security
IPTV—Internet Protocol Television
IPv4—Internet Protocol version 4
IPv6—Internet Protocol version 6
Internetwork Packet Exchange | IPX—Internetwork Packet Exchange
Intermediate language | IR—Intermediate Representation
Internet Relay Chat | IRC—Internet Relay Chat
Infrared Data Association | IrDA—Infrared Data Association
Internationalized Resource Identifier | IRI—Internationalized Resource Identifier
I/F—Interface
I/O request packet | IRP—I/O Request Packet
Interrupt request | IRQ—Interrupt Request
Information systems | IS—Information Systems
IS-IS—Intermediate System to Intermediate System
Industry Standard Architecture | ISA—Industry Standard Architecture
Instruction set | ISA—Instruction Set Architecture
ISAM—Indexed Sequential Access Method
ISATAP—Intra-Site Automatic Tunnel Addressing Protocol
Internet Storm Center | ISC—Internet Storm Center
iSCSI—Internet Small Computer System Interface
Integrated services digital network | ISDN—Integrated Services Digital Network
International Organization for Standardization | ISO—International Organization for Standardization
Internet Storage Name Service | iSNS—Internet Storage Name Service
Internet service provider | ISP—Internet Service Provider
ISPF—Interactive System Productivity Facility
Interrupt handler | ISR—Interrupt Service Routine
Independent software vendor | ISV—Independent Software Vendor
Information technology | IT—Information Technology
Information Technology Infrastructure Library | ITIL—Information Technology Infrastructure Library
Interval temporal logic | ITL—Interval Temporal Logic
International Telecommunication Union | ITU—International Telecommunication Union
Interactive voice response | IVRS—Interactive Voice Response System
Interactive Virtual Classroom | IVCR—Interactive Virtual Classroom

J

Java Platform, Enterprise Edition | J2EE—Java 2 Enterprise Edition
Java Platform, Micro Edition | J2ME—Java 2 Micro Edition
Java Platform, Standard Edition | J2SE—Java 2 Standard Edition
Java Architecture for XML Binding | JAXB—Java Architecture for XML Binding
Java API for XML-based RPC | JAX-RPC—Java XML for Remote Procedure Calls
Java API for XML Processing | JAXP—Java API for XML Processing
JBOD—Just a Bunch of Disks
Java Cryptography Extension | JCE
Java Cryptography Extension
Job Control Language | JCL—Job Control Language
Java Community Process | JCP—Java Community Process
Java Database Connectivity | JDBC—Java Database Connectivity
Java Development Kit | JDK—Java Development Kit
Java Platform, Enterprise Edition | JEE—Java Enterprise Edition
Job Entry Subsystem 2/3 | JES—Job Entry Subsystem
Java Desktop System | JDS—Java Desktop System
Java Foundation Classes | JFC—Java Foundation Classes
JFET—Junction Field-Effect Transistor
JFS (file system) | JFS—IBM Journaling File System
Jini | JINI—Jini Is Not Initials
Just-in-time compilation | JIT—Just-In-Time
Java Platform, Micro Edition | JME—Java Micro Edition
Java Management Extensions | JMX—Java Management Extensions
Java Message Service | JMS—Java Message Service
Java Naming and Directory Interface | JNDI—Java Naming and Directory Interface
Java Native Interface | JNI—Java Native Interface
Instruction set | JNZ—Jump non-zero
JPEG—Joint Photographic Experts Group
Java Runtime Environment | JRE—Java Runtime Environment
JavaScript | JS—JavaScript
Java Platform, Standard Edition | JSE—Java Standard Edition
JSON—JavaScript Object Notation
Jackson Structured Programming | JSP—Jackson Structured Programming
JavaServer Pages | JSP—JavaServer Pages
Joint Test Action Group | JTAG—Joint Test Action Group
Java User Group | JUG—Java Users Group
Java Virtual Machine | JVM—Java Virtual Machine

K

The C Programming Language (book) | K&R—Kernighan and Ritchie
Keyboard (computing) | KB—Keyboard
Kilobit | Kb—Kilobit
Kilobyte | KB—Kilobyte
Knowledge base | KB—Knowledge Base
Kibibyte | KiB—Kibibyte
KDE—K Desktop Environment
Kilohertz | kHz—Kilohertz
KM—Knowledge Machine
KRL (programming language) | KRL—Knowledge Representation Language
KVM switch | KVM—Keyboard, Video, Mouse

L

Internationalization and localization | L10N—Localization
Layer 2 Tunneling Protocol | L2TP—Layer two Tunneling Protocol
Link Aggregation Control Protocol | LACP—Link Aggregation Control Protocol
LAMP (software bundle) | LAMP—Linux Apache MySQL Perl
LAMP (software bundle) | LAMP—Linux Apache MySQL PHP
LAMP (software bundle) | LAMP—Linux Apache MySQL Python
Local area network | LAN—Local Area Network
Logical block addressing | LBA—Logical Block Addressing
Load balancing (computing) | LB—Load Balancer
Liquid crystal display | LCD—Liquid Crystal Display
Least Cost Routing | LCR—Least Cost Routing
Liquid crystal on silicon | LCOS—Liquid Crystal On Silicon
Lightweight Directory Access Protocol | LDAP—Lightweight Directory Access Protocol
Logical volume management | LE—Logical Extents
Light-emitting diode | LED—Light-Emitting Diode
Line feed | LF—Line Feed
Low frequency | LF—Low Frequency
Linux From Scratch | LFS—Linux From Scratch
GNU Lesser General Public License | LGPL—Lesser General Public License
Library (computing) | LIB—LIBrary
Low insertion force | LIF—Low Insertion Force
LIFO (computing) | LIFO—Last In First Out
LILO (boot loader) | LILO—Linux Loader
Lisp (programming language) | LISP—LISt Processing
Linux kernel mailing list | LKML—Linux Kernel Mailing List
LAN Manager | LM—Lan Manager
Source lines of code | LOC—Lines of Code
LPC (programming language) | LPC—Lars Pensjö C
Linux Professional Institute | LPI—Linux Professional Institute
Parallel port | LPT
Line Print Terminal
Least Recently Used | LRU—Least Recently Used
Least significant bit | LSB—Least Significant Bit
Linux Standard Base | LSB—Linux Standard Base
Large Scale Integration | LSI—Large-Scale Integration
Long Term Evolution | LTE—Long Term Evolution
Linear temporal logic | LTL—Linear Temporal Logic
Bi-directional text | LTR—Left-to-Right
Linux User Group | LUG—Linux User Group
Logical Unit Number | LUN—Logical Unit Number
Logical volume management | LV—Logical Volume
Low-voltage differential signaling | LVD—Low Voltage Differential
Logical volume management | LVM—Logical Volume Management
Lempel–Ziv–Welch | LZW—Lempel-Ziv-Welch
Land Grid Array | LGA—Land Grid Array

M

Mandatory access control | MAC—Mandatory Access Control
Media Access Control | MAC—Media Access Control
Metropolitan area network | MAN—Metropolitan Area Network
Mobile ad hoc network | MANET—Mobile Ad-Hoc Network
Messaging Application Programming Interface | MAPI—Messaging Application Programming Interface
Megabit | Mb—Megabit
Megabyte | MB—Megabyte
Multi-byte character set | MBCS—Multi Byte Character Set
Model-based design | MBD—Model-Based Design
Master boot record | MBR—Master Boot Record
Micro Channel architecture | MCA—Micro Channel Architecture
Microsoft Certified Professional | MCA—Microsoft Certified Architect
Microsoft Certified Application Developer or M.C.A.D. | MCAD—Microsoft Certified Application Developer
Microsoft Certified Application Specialist or M.C.A.S. | MCAS—Microsoft Certified Application Specialist
MCDBA—Microsoft Certified DataBase Administrator
Microsoft Certified Desktop Support Technician or M.C.D.S.T. | MCDST—Microsoft Certified Desktop Support Technician
Microsoft Certified Professional | MCITP—Microsoft Certified Information Technology Professional
Microsoft Certified Professional | MCM—Microsoft Certified Master
Microsoft Certified Professional | MCP—Microsoft Certified Professional
Multiple Channels Per Carrier | MCPC—Multiple Channels Per Carrier
Microsoft Certified Professional | MCPD—Microsoft Certified Professional Developer
Microsoft Certified Systems Administrator or M.C.S.A. | MCSA—Microsoft Certified Systems Administrator
Microsoft Certified Solution Developer or M.C.S.D. | MCSD—Microsoft Certified Solution Developer
Microsoft Certified Systems Engineer or M.C.S.E. | MCSE—Microsoft Certified Systems Engineer
Microsoft Certified Trainer or M.C.T. | MCT—Microsoft Certified Trainer
Microsoft Certified Professional | MCTS—Microsoft Certified Technology Specialist
Mail delivery agent | MDA—Mail Delivery Agent
Model-driven architecture | MDA—Model-Driven Architecture
IBM Monochrome Display Adapter | MDA—Monochrome Display Adapter
Model-driven software development | MDD/MDSD—Model-Driven (Software) Development
Main distribution frame | MDF—Main Distribution Frame
Multiple document interface | MDI—Multiple Document Interface
Microsoft Edge | ME—Microsoft Edge
Windows Me | ME—[Windows] Millennium Edition
Medium frequency | MF—Medium Frequency
Microsoft Foundation Class Library | MFC—Microsoft Foundation Classes
Modified Frequency Modulation | MFM—Modified Frequency Modulation
Media Gateway Control Protocol | MGCP—Media Gateway Control Protocol
Megahertz | MHz—Megahertz
Management information base | MIB—Management Information Base
Magnetic ink character recognition | MICR—Magnetic Ink Character Recognition
Musical Instrument Digital Interface | MIDI—Musical Instrument Digital Interface
MIMD—Multiple Instruction, Multiple Data
MIMO—Multiple-Input Multiple-Output
MINIX—MIni-uNIX
Million instructions per second | MIPS—Million Instructions Per Second
MIPS architecture | MIPS—Microprocessor without Interlocked Pipeline Stages
Management information system | MIS—Management Information Systems
MISD—Multiple Instruction, Single Data
Massachusetts Institute of Technology | MIT—Massachusetts Institute of Technology
MIME—Multipurpose Internet Mail Extensions
Multichannel Multipoint Distribution Service | MMDS—Multichannel Multipoint Distribution Service
Mortality Medical Data System | MMDS—Mortality Medical Data System
Man-machine interface | MMI—Man Machine Interface.
Memory-mapped I/O | MMIO—Memory-Mapped I/O
Massively multiplayer online role-playing game | MMORPG—Massively Multiplayer Online Role-Playing Game
Microsoft Management Console | MMC— Microsoft Management Console
Multi-mode optical fiber | MMF—Multi-Mode (optical) Fiber
Memory management unit | MMU—Memory Management Unit
MMX (instruction set) | MMX—Multi-Media Extensions
Multiple-image Network Graphics | MNG—Multiple-image Network Graphics
Motherboard | MoBo—Motherboard
Message-oriented middleware | MOM—Message-Oriented Middleware
MOO—MUD Object Oriented
Metaobject protocol | MOP—Meta-Object Protocol
Microsoft Office Specialist or M.O.S. | MOS—Microsoft Office Specialist
MOSFET—Metal-Oxide Semiconductor Field Effect Transistor
Motd (Unix) | MOTD—Message Of The Day
Microsoft Certified Professional | MOUS—Microsoft Office User Specialist
QuickTime File Format | MOV—Apple QuickTime Multimedia File
Motion Picture Association of America | MPAA—Motion Picture Association of America
Moving Picture Experts Group | MPEG—Motion Pictures Experts Group
Mozilla Public License | MPL—Mozilla Public License
Multiprotocol Label Switching | MPLS—Multiprotocol Label Switching
Microprocessor | MPU—Microprocessor Unit
USB flash drive | MS—Memory Stick
Microsoft | MS—Microsoft
Most significant bit | MSB—Most Significant Bit
Microsoft Network | MSN—Microsoft Network
MS-DOS—Microsoft DOS
Machine translation | MT—Machine Translation
Message transfer agent | MTA—Mail Transfer Agent
Microsoft Certified Professional | MTA—Microsoft Technology Associate
MTBF—Mean Time Between Failures
Maximum transmission unit | MTU—Maximum Transmission Unit
Mail submission agent | MSA—Mail Submission Agent
Microsoft Developer Network | MSDN—Microsoft Developer Network
MSI | MSI—Medium-Scale Integration
Message Signaled Interrupts | MSI—Message Signaled Interrupt
Windows Installer | MSI—Microsoft Installer
Mail User Agent | MUA—Mail User Agent
MUD—Multi-User Dungeon
Model–view–controller | MVC—Model-View-Controller
Microsoft Most Valuable Professional | MVP—Most Valuable Professional
MVS—Multiple Virtual Storage
Mobile World Congress | MWC—Mobile World Congress
MX record | MX—Mail exchange
Material Exchange Format | MXF—Material Exchange Format

N

Negative-acknowledge character | NACK—Negative ACKnowledgement
Negative-acknowledge character | NAK—Negative AcKnowledge Character
NaN—Not a Number
Network Access Protection | NAP—Network Access Protection
Network-attached storage | NAS—Network-Attached Storage
Netwide Assembler | NASM—Netwide ASseMbler
Network address translation | NAT—Network Address Translation
NetWare Core Protocol | NCP—NetWare Core Protocol
Native Command Queuing | NCQ—Native Command Queuing
National Center for Supercomputing Applications | NCSA—National Center for Supercomputing Applications
Network Driver Interface Specification | NDIS—Network Driver Interface Specification
Novell Embedded Systems Technology | NDPS—Novell Distributed Print Services
Novell Directory Services | NDS—Novell Directory Services
Network Equipment Provider | NEP—Network Equipment Provider
NetBIOS—Network Basic Input/Output System
NetBIOS over TCP/IP | NetBT—NetBIOS over TCP/IP
Near end crosstalk | NEXT—Near-End CrossTalk
Nondeterministic finite automaton | NFA—Nondeterministic Finite Automaton
Near field communication | NFC—Near field communication
Network File System (protocol) | NFS—Network File System
NGL—aNGeL
Next-Generation Secure Computing Base | NGSCB—Next-Generation Secure Computing Base
National Instruments | NI—National Instruments
Network interface controller | NIC—Network Interface Controller
No Internal Message | NIM—No Internal Message
Non-blocking I/O (Java) | NIO—Non-blocking I/O
National Institute of Standards and Technology | NIST—National Institute of Standards and Technology
Natural language processing | NLP—Natural Language Processing
Internationalization and localization | NLS—Native Language Support
Non-maskable interrupt | NMI—Non-Maskable Interrupt
Network News Transfer Protocol | NNTP—Network News Transfer Protocol
Network operations center | NOC—Network Operations Center
NOP—No OPeration
Network operating system | NOS—Network Operating System
NP (complexity) | NP—Nondeterministic Polynomial time
Netscape Public License | NPL—Netscape Public License
Native POSIX Thread Library | NPTL—Native POSIX Thread Library
Network Processing Unit | NPU—Network Processing Unit
Netscape | NS—Netscape
Network Security Appliance | NSA—Network Security Appliance
Network Service Interface | NSI—Network Service Interface
Netscape Portable Runtime | NSPR—Netscape Portable Runtime
Novell Storage Services | NSS—Novell Storage Service
Network Security Services | NSS—Network Security Services
Name Service Switch | NSS—Name Service Switch
Windows NT | NT—New Technology
NTFS—NT Filesystem
NTLM—NT Lan Manager
Network Time Protocol | NTP—Network Time Protocol
Non-Uniform Memory Access | NUMA—Non-Uniform Memory Access
Non-uniform rational B-spline | NURBS—Non-Uniform Rational B-Spline
Network Video Recorder | NVR—Network Video Recorder
Non-volatile random access memory | NVRAM—Non-Volatile Random Access Memory

O

OASIS (organization) | OASIS—Organization for the Advancement of Structured Information Standards
Operational Acceptance Testing | OAT—Operational Acceptance Testing
OBSAI—Open Base Station Architecture Initiative
Open Database Connectivity | ODBC—Open Database Connectivity
Original equipment manufacturer | OEM—Original Equipment Manufacturer
Open Enterprise Server | OES—Open Enterprise Server
Orthogonal Frequency Division Multiplexing | OFDM—Orthogonal Frequency Division Multiplexing
Open and Free Technology Community | OFTC—Open and Free Technology Community
Object identifier | OID—Object Identifier
Online analytical processing | OLAP—Online Analytical Processing
Object Linking and Embedding | OLE—Object Linking and Embedding
Organic light-emitting diode | OLED—Organic Light Emitting Diode
One Laptop per Child | OLPC—One Laptop per Child
Online transaction processing | OLTP—Online Transaction Processing
Relocatable Object Module Format | OMF—Object Module Format
Object Management Group | OMG—Object Management Group
Optical Mark Recognition | OMR—Optical Mark Reader
Object-oriented programming | OO—Object-Oriented
OpenOffice.org | OO—OpenOffice
Out-of-order execution | OOE—Out-of-Order Execution
Out of memory | OOM—Out Of Memory
OpenOffice.org | OOo—OpenOffice.org
Out-of-order execution | OoOE—Out-of-Order Execution
Object-oriented programming | OOP—Object-Oriented Programming
Out of the box (feature) | OOTB—Out of the box
OPML—Outline Processor Markup Language
Object request broker | ORB—Object Request Broker
Object-relational mapping | ORM—Object-Relational Mapping
Open source | OS—Open Source
Operating system | OS—Operating System
O'Reilly Open Source Convention | OSCON—O'Reilly Open Source CONvention
OSDN—Open Source Development Network
Open Source Initiative | OSI—Open Source Initiative
Open Systems Interconnection | OSI—Open Systems Interconnection
Open Shortest Path First | OSPF—Open Shortest Path First
Open Sound System | OSS—Open Sound System
Open source software | OSS—Open-Source Software
Operations support system | OSS—Operations Support System
Open Source Technology Group | OSTG—Open Source Technology Group
Organizationally Unique Identifier | OUI—Organisationally Unique Identifier

P

Peer-to-peer | P2P—Peer-To-Peer
Platform as a service | PaaS—Platform as a Service
Personal area network | PAN—Personal Area Network
Password authentication protocol | PAP—Password Authentication Protocol
PARC (company) | PARC—Palo Alto Research Center
Parallel ATA | PATA—Parallel ATA
Portable Batch System | PBS—Portable Batch System
Personal computer | PC—Personal Computer
Printed circuit board | PCB—Printed Circuit Board
Process control block | PCB—Process Control Block
IBM PC DOS | PC DOS—Personal Computer Disc Operating System
Peripheral Component Interconnect | PCI—Peripheral Component Interconnect
PCI Express | PCIe—PCI Express
PCI Extended | PCI-X—PCI Extended
Printer Command Language | PCL—Printer Command Language
Personal Computer Memory Card International Association | PCMCIA—Personal Computer Memory Card International Association
Pulse-code modulation | PCM—Pulse-Code Modulation
Perl Compatible Regular Expressions | PCRE—Perl Compatible Regular Expressions
Public domain | PD—Public Domain
Personal digital assistant | PDA—Personal Digital Assistant
Portable Document Format | PDF—Portable Document Format
Plesiochronous Digital Hierarchy | PDH—Plesiochronous Digital Hierarchy
Programmed Data Processor | PDP—Programmed Data Processor
Logical volume management | PE—Physical Extents
Perl | PERL—Practical Extraction and Reporting Language
Please Find Atachment | PFA—Please Find Attachment
Peripheral Gateway | PG—Peripheral Gateway
Pin grid array | PGA—Pin Grid Array
Field-programmable gate array | PGA—Programmable Gate Array
Profile-guided optimization | PGO—Profile-Guided Optimization
Pretty Good Privacy | PGP—Pretty Good Privacy
PHP—Hypertext Preprocessor
PIC microcontroller | PIC—Peripheral Interface Controller
Programmable Interrupt Controller | PIC—Programmable Interrupt Controller
PID controller | PID—Proportional-Integral-Derivative
Process identifier | PID—Process ID
Personal information manager | PIM—Personal Information Manager
Pine (e-mail client) | PINE—Program for Internet News and Email
Platform Independent Model | PIM—Platform Independent Model
Programmed input/output | PIO—Programmed Input/Output
PKCS—Public Key Cryptography Standards
Public key infrastructure | PKI—Public Key Infrastructure
Power line communication | PLC—Power Line Communication
Programmable logic controller | PLC—Programmable Logic Controller
Programmable logic device | PLD—Programmable Logic Device
PL/I—Programming Language One
PL/M—Programming Language for Microcomputers
PL/P—Programming Language for Prime
Power line communication | PLT—Power Line Telecommunications
Power-on self-test | PMM—POST Memory Manager
Portable Network Graphics | PNG—Portable Network Graphics
Plug and play | PnP—Plug-and-Play
Peer Name Resolution Protocol | PNRP—Peer Name Resolution Protocol
Power over Ethernet | PoE—Power over Ethernet
Persistent Object Identifier | POID—Persistent Object Identifier
Plain Old Java Object | POJO—Plain Old Java Object
Point of presence | POP—Point of Presence
Post Office Protocol | POP3—Post Office Protocol v3
POSIX—Portable Operating System Interface, formerly IEEE-IX
Power-on self-test | POST—Power-On Self Test
PowerPC | PPC—PowerPC
Pixels per inch | PPI—Pixels Per Inch
Point-to-Point Protocol | PPP—Point-to-Point Protocol
Point-to-Point Protocol over ATM | PPPoA—PPP over ATM
Point-to-Point Protocol over Ethernet | PPPoE—PPP over Ethernet
Point-to-point tunneling protocol | PPTP—Point-to-Point Tunneling Protocol
Pull request | PR—Pull Request
PostScript | PS—PostScript
IBM Personal System/2 | PS/2—Personal System/2
Professional Services Automation | PSA—Professional Services Automation
Platform Specific Model | PSM—Platform Specific Model
Power supply | PSU—Power Supply Unit
PSVI—Post-Schema-Validation Infoset
PTS-DOS—PhysTechSoft - Disk Operating System
Logical volume management | PV—Physical Volume
Logical volume management | PVG—Physical Volume Group
Personal video recorder | PVR—Personal Video Recorder
Preboot Execution Environment | PXE—Preboot Execution Environment
PCI eXtensions for Instrumentation | PXI—PCI eXtensions for Instrumentation

Q

Quad Data Rate SRAM | QDR—Quad Data Rate
Quality control | QA—Quality Assurance
Quad Flat Package | QFP—Quad Flat Package
Quality of service | QoS—Quality of Service
QOTD—Quote of the Day
Qt (toolkit) | Qt—Quasar Toolkit
Queued teleprocessing access method | QTAM—Queued Teleprocessing Access Method
Quarter Small Outline Package | QSOP—Quarter Small Outline Package
Quality Windows Audio/Video Experience | qWave—Quality Windows Audio/Video Experience

R

RACF—Resource Access Control Facility
Rapid application development | RAD—Rapid Application Development
RADIUS—Remote Authentication Dial In User Service
RAID—Redundant Array of Independent Disks
Resource Acquisition Is Initialization | RAII—Resource Acquisition Is Initialization
RAID | RAIT—Redundant Array of Inexpensive Tapes
Random-access memory | RAM—Random Access Memory
Reverse Address Resolution Protocol | RARP—Reverse Address Resolution Protocol
Reliability, availability and serviceability (computer hardware) | RAS—Reliability, Availability and Serviceability
remote access service | RAS—Remote access service
DVD region code | RC—Region Code
Release Candidate | RC—Release Candidate
Run commands | RC—Run Commands
Revision Control System | RCS—Revision Control System
Remote desktop software | RD—Remote Desktop
remove directory | rd—remove directory
Relational database management system | RDBMS—Relational Database Management System
Remote Desktop Connection | RDC—Remote Desktop Connection
Resource Description Framework | RDF—Resource Description Framework
Relational data model | RDM—Relational Data Model
RTOS | RDOS—Real-time Disk Operating System
Remote Desktop Protocol | RDP— Remote Desktop Protocol
Remote Data Services | RDS—Remote Data Services
Refal | REFAL—Recursive Functions Algorithmic Language
Representational State Transfer | REST—Representational State Transfer
Regular expression | regex—Regular Expression
Regular expression | regexp—Regular Expression
Radio frequency | RF—Radio Frequency
Request for Comments | RFC—Request For Comments
Radio frequency interference | RFI—Radio Frequency Interference
Radio-frequency identification | RFID—Radio Frequency Identification
RGB color model | RGB—Red, Green, Blue
RGBA—Red, Green, Blue, Alpha
Red Hat Linux | RHL—Red Hat Linux
Red Hat Enterprise Linux | RHEL—Red Hat Enterprise Linux
Rich Internet application | RIA—Rich Internet Application
Recording Industry Association of America | RIAA—Recording Industry Association of America
Raster image processor | RIP—Raster Image Processor
Routing Information Protocol | RIP—Routing Information Protocol
Regional Internet registry | RIR—Regional Internet registry
Reduced instruction set computer | RISC—Reduced Instruction Set Computer
RISC OS—Reduced Instruction Set Computer Operating System
Remote job entry | RJE—Remote Job Entry
Run-length encoding | RLE—Run-Length Encoding
Run-length limited | RLL—Run-Length Limited
remove directory | rmdir—remove directory
Java remote method invocation | RMI—Remote Method Invocation
Richard Stallman | RMS—Richard Matthew Stallman
Read-only memory | ROM—Read Only Memory
S-LINK | ROMB—Read-Out Motherboard
ROM-DOS—Read Only Memory - Disk Operating System
Remote procedure call | RPC—Remote Procedure Call
IBM RPG | RPG—Report Program Generator
RPM Package Manager | RPM—RPM Package Manager
Routing and Remote Access Service | RRAS—Routing and Remote Access Service
RSA (algorithm) | RSA—Rivest Shamir Adleman
Repetitive strain injury | RSI—Repetitive Strain Injury
Radio Service Software | RSS—Radio Service Software
RSS—Rich Site Summary, RDF Site Summary, or Really Simple Syndication
RTAI—Real-Time Application Interface
Real-time clock | RTC—Real-Time Clock
Real-time business intelligence | RTE—Real-Time Enterprise
RTEMS—Real-Time Executive for Multiprocessor Systems
Bi-directional text | RTL—Right-to-Left
Real-time operating system | RTOS—Real-Time Operating System
Real-time Transport Protocol | RTP—Real-time Transport Protocol
Flow control (data) | RTS—Ready To Send
Real Time Streaming Protocol | RTSP—Real Time Streaming Protocol
Run-time type information | RTTI—Run-time Type Information
Responsive Web Design | RWD—Responsive Web Design

S

Software as a service | SaaS—Software as a Service
Security Account Manager | SAM— Security Account Manager
Storage area network | SAN—Storage Area Network
Serial attached SCSI | SAS—Serial attached SCSI
Serial ATA | SATA—Serial ATA
Simple API for XML | SAX—Simple API for XML
Spinning beachball of death | SBOD—Spinning Beachball of Death
Serial Bus Protocol 2 | SBP-2—Serial Bus Protocol 2
sbin—superuser binary
Windows Small Business Server | sbs—Small Business Server
Standard Build Unit | SBU—Standard Build Unit
SCADA—Supervisory Control And Data Acquisition
Source Code in Database | SCID—Source Code in Database
Software configuration management | SCM—Software Configuration Management
Revision control | SCM—Source Code Management
Secure copy | SCP—Secure Copy
Single channel per carrier | SCPC—Single Channel Per Carrier
Standard Commands for Programmable Instruments | SCPI—Standard Commands for Programmable Instrumentation
Secure Content Storage Association | SCSA—Secure Content Storage Association
SCSI—Small Computer System Interface
Stream Control Transmission Protocol | SCTP—Stream Control Transmission Protocol
Secure Digital | SD—Secure Digital
SDDL—Security Descriptor Definition Language
Synchronous Digital Hierarchy | SDH—Synchronous Digital Hierarchy
Single document interface | SDI—Single Document Interface
Single Edge Contact | SEC—Single Edge Contact
Secure Digital | SDIO—Secure Digital Input Output
Software development kit | SDK—Software Development Kit
Simple DirectMedia Layer | SDL—Simple DirectMedia Layer
Service Delivery | SDN—Service Delivery Network
Session Description Protocol | SDP—Session Description Protocol
Software-defined radio | SDR—Software-Defined Radio
Synchronous dynamic random access memory | SDRAM—Synchronous Dynamic Random Access Memory
Symmetric digital subscriber line | SDSL—Symmetric DSL
Single-ended signalling | SE—Single Ended
Software Engineering Institute | SEI—Software Engineering Institute
Search engine optimization | SEO—Search Engine Optimization
FTP over SSH | SFTP—Secure FTP
Simple File Transfer Protocol | SFTP—Simple File Transfer Protocol
SSH file transfer protocol | SFTP—SSH File Transfer Protocol
Silicon Graphics | SGI—Silicon Graphics, Incorporated
Standard Generalized Markup Language | SGML—Standard Generalized Markup Language
graphics | SGR—Select Graphic Rendition
Secure Hash Algorithm | SHA—Secure Hash Algorithm
Single-pair high-speed digital subscriber line | SHDSL—Single-pair High-speed Digital Subscriber Line
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
Session Initiation Protocol | SIP—Session Initiation Protocol
Supplementary Ideographic Plane | SIP—Supplementary Ideographic Plane
SISD—Single Instruction, Single Data
Single-Input and Single-Output | SISO—Single-Input and Single-Output
SUSE Linux Enterprise Desktop | SLED—SUSE Linux Enterprise Desktop
SUSE Linux Enterprise Server | SLES—SUSE Linux Enterprise Server
Scalable Link Interface | SLI—Scalable Link Interface
Serial Line Internet Protocol | SLIP—Serial Line Internet Protocol
Service Level Management | SLM—Service Level Management
Source lines of code | SLOC—Source Lines of Code
Subject Matter Expert | SME—Subject Matter Expert
Single-mode optical fiber | SMF—Single-Mode (optical) Fiber
Software project management | SPM—Software project management
SPMD—Single Program, Multiple Data
SMA connector | SMA—SubMiniature version A
Server Message Block | SMB—Server Message Block
System Management BIOS | SMBIOS—System Management BIOS
Synchronized Multimedia Integration Language | SMIL—Synchronized Multimedia Integration Language
S/MIME—Secure/Multipurpose Internet Mail Extensions
Supplementary Multilingual Plane | SMP—Supplementary Multilingual Plane
Symmetric multiprocessing | SMP—Symmetric Multi-Processing
Switched-mode power supply | SMPS—Switch Mode Power Supply
SMS—Short Message Service
System Management Server | SMS—System Management Server
Simultaneous multithreading | SMT—Simultaneous Multithreading
Simple Mail Transfer Protocol | SMTP—Simple Mail Transfer Protocol
IBM Systems Network Architecture | SNA—Systems Network Architecture
Simple Network Management Protocol | SNMP—Simple Network Management Protocol
SNTP—Simple Network Time Protocol
Service-oriented architecture | SOA—Service-Oriented Architecture
SOAP—Simple Object Access Protocol
Symbolic Optimal Assembly Program | SOAP—Symbolic Optimal Assembly Program
Stop Online Piracy Act | SOPA—Stop Online Piracy Act
System-on-a-chip | SoC—System-on-a-Chip
SO-DIMM—Small Outline DIMM
Standard Operating Environment | SOE—Standard Operating Environment
Small office/home office | SOHO—Small Office/Home Office
Silicon on insulator | SOI—Silicon On Insulator
Service pack | SP—Service Pack
Single-page application | SPA—Single Page Application
Sender Policy Framework | SPF—Sender Policy Framework
Serial Peripheral Interface Bus | SPI—Serial Peripheral Interface
Stateful Packet Inspection | SPI—Stateful Packet Inspection
SPARC—Scalable Processor Architecture
SQL—Structured Query Language
Static random access memory | SRAM—Static Random Access Memory
Static single assignment form | SSA—Static Single Assignment
V-Model (software development) | SSD—Software Specification Document
Solid-state drive | SSD—Solid-State Drive
Simple Service Discovery Protocol | SSDP—Simple Service Discovery Protocol
Streaming SIMD Extensions | SSE—Streaming SIMD Extensions
Secure Shell | SSH—Secure Shell
Server Side Includes | SSI—Server Side Includes
Single-system image | SSI—Single-System Image
Small Scale Integration | SSI—Small-Scale Integration
Service set (802.11 network) | SSID—Service Set Identifier
Secure Sockets Layer | SSL—Secure Socket Layer
Single Sign On | SSO—Single Sign On
Supplementary Special-purpose Plane | SSP—Supplementary Special-purpose Plane
Streaming SIMD Extensions | SSSE—Supplementary Streaming SIMD Extensions
Single-source shortest paths | SSSP—Single Source Shortest Path
Secure Socket Tunneling Protocol | SSTP—Secure Socket Tunneling Protocol
su (Unix) | su—superuser
Single UNIX Specification | SUS—Single UNIX Specification
SUSE Linux | SUSE—Software und System-Entwicklung
Scalable Video Coding | SVC—Scalable Video Coding
Scalable Vector Graphics | SVG—Scalable Vector Graphics
Super Video Graphics Array | SVGA—Super Video Graphics Array
Structured VLSI design | SVD—Structured VLSI Design
Adobe Flash | SWF—Shock Wave Flash
Standard Widget Toolkit | SWT—Standard Widget Toolkit
Sysop—System operator

T

Optical disc recording modes | TAO—Track-At-Once
Telephony Application Programming Interface | TAPI—Telephony Application Programming Interface
Turbo Assembler | TASM—Turbo ASseMbler
Terabyte | TB—TeraByte
Tcl—Tool Command Language
Transmission Control Protocol | TCP—Transmission Control Protocol
Internet Protocol Suite | TCP/IP—Transmission Control Protocol/Internet Protocol
Telecommunication Control Unit | TCU—Telecommunication Control Unit
Time-division multiple access | TDMA—Time-Division Multiple Access
Thin-film transistor | TFT—Thin-Film Transistor
tif- image(Tagged Image File Format)
TFTP—Trivial File Transfer Protocol
Texas Instruments | TI—Texas Instruments
Three-letter acronym | TLA—Three-Letter Acronym
Top-level domain | TLD—Top-Level Domain
Thread-local storage | TLS—Thread-Local Storage
Transport Layer Security | TLS—Transport Layer Security
Type-length-value | TLV—Type-length-value
/var/run | tmp—temporary
Terminal node controller | TNC—Terminal Node Controller
TNC connector | TNC—Threaded Neill-Concelman connector
Transaction Processing Facility | TPF—Transaction Processing Facility
Trusted Platform Module | TPM—Trusted Platform Module
TRON command | TROFF—Trace Off
TRON command | TRON—Trace On
TRON Project | TRON—The Real-time Operating system Nucleus
TRSDOS—Tandy Radio Shack - Disk Operating System
Time Sharing Option | TSO—Time Sharing Option
Travelling salesman problem | TSP—Traveling Salesman Problem
Terminate and Stay Resident | TSR—Terminate and Stay Resident
TTA (codec) | TTA—True Tap Audio
TrueType | TTF—TrueType Font
Transistor–transistor logic | TTL—Transistor-Transistor Logic
Time to live | TTL—Time To Live
Speech synthesis | TTS—Text-to-Speech
Computer terminal | TTY—Teletype
Tucows | TUCOWS—The Ultimate Collection of Winsock Software
Community | TUG—TeX Users Group
TWAIN—Technology Without An Interesting Name

U

UAAG—User Agent Accessibility Guidelines
User Account Control | UAC—User Account Control
Universal asynchronous receiver/transmitter | UART—Universal Asynchronous Receiver/Transmitter
User Acceptance Testing | UAT—User Acceptance Testing
Universal Character Set | UCS—Universal Character Set
Universal Description Discovery and Integration | UDDI—Universal Description, Discovery, and Integration
UDMA—Ultra DMA
User Datagram Protocol | UDP—User Datagram Protocol
UEFI—Unified Extensible Firmware Interface
Ultra high frequency | UHF—Ultra High Frequency
User interface | UI—User Interface
Upload | UL—Upload
Gate array | ULA—Uncommitted Logic Array
Upper memory area | UMA—Upper Memory Area
Upper memory area | UMB—Upper Memory Block
Unified Modeling Language | UML—Unified Modeling Language
User-mode Linux | UML—User-Mode Linux
Ultra-Mobile PC | UMPC—Ultra-Mobile Personal Computer
Universal Mobile Telecommunications System | UMTS—Universal Mobile Telecommunications System
Universal Naming Convention | UNC—Universal Naming Convention
UNIVAC—Universal Automatic Computer (By MKS)
Uninterruptible power supply | UPS—Uninterruptible Power Supply
Uniform Resource Identifier | URI—Uniform Resource Identifier
Uniform Resource Locator | URL—Uniform Resource Locator
Uniform Resource Name | URN—Uniform Resource Name
Universal Serial Bus | USB—Universal Serial Bus
/usr | usr—user
U.S. Robotics | USR—U.S. Robotics
Coordinated Universal Time | UTC—Coordinated Universal Time
Unicode | UTF—Unicode Transformation Format
Unshielded twisted pair | UTP—Unshielded Twisted Pair
UMTS Terrestrial Radio Access Network | UTRAN—Universal Terrestrial Radio Access Network
UUCP—Unix to Unix Copy
Universally Unique Identifier | UUID—Universally Unique Identifier
Universal User Name | UUN—Universal User Name
Universal Virtual Computer | UVC—Universal Virtual Computer
Universal Windows Platform | UWP—Universal Windows Platform
User experience design | UX—User Experience

V

Filesystem Hierarchy Standard | var—variable
VAX—Virtual Address eXtension
DOS Protected Mode Interface | VCPI—Virtual Control Program Interface
Virtual reality | VR—Virtual Reality
VRML—Virtual Reality Modeling Language
Visual Basic | VB—Visual Basic
Visual Basic for Applications | VBA—Visual Basic for Applications
VBScript | VBS—Visual Basic Script
Desktop virtualization | VDI—Virtual Desktop Infrastructure
Virtual DOS machine | VDM— Virtual DOS machine
Very high bitrate digital subscriber line | VDSL—Very High Bitrate Digital Subscriber Line
VESA—Video Electronics Standards Association
File Allocation Table | VFAT—Virtual FAT
Virtual Hard Disk | VHD — Virtual Hard Disk
Virtual file system | VFS—Virtual File System
Logical volume management | VG—Volume Group
Video Graphics Array | VGA—Video Graphics Array
Very high frequency | VHF—Very High Frequency
Virtual LAN | VLAN—Virtual Local Area Network
VLSM—Variable Length Subnet Mask
VESA Local Bus | VLB—Vesa Local Bus
Very low frequency | VLF—Very Low Frequency
Very long instruction word | VLIW—Very Long Instruction Word
Very-large-scale integration | VLSI—Very-Large-Scale Integration
Virtual machine | VM—Virtual Machine
Virtual memory | VM—Virtual Memory
Hypervisor | VMM—Virtual Machine Monitor
VNC—Virtual Network Computing
Video on demand | VOD—Video On Demand
Voice over Internet Protocol | VoIP—Voice over Internet Protocol
Virtual private network | VPN—Virtual Private Network
Graphics processing unit | VPU—Visual Processing Unit
Virtual storage access method | VSAM—Virtual Storage Access Method
Very small aperture terminal | VSAT—Very Small Aperture Terminal
VT100 | VT—Video Terminal?
Virtual Tape Library | VTL— Virtual Tape Library
Virtual telecommunications access method | VTAM—Virtual Telecommunications Access Method
Video Random Access Memory | VRAM—Video Random Access Memory

W

World Wide Web Consortium | W3C—World Wide Web Consortium
Apple Worldwide Developers Conference | WWDC—Apple Inc. | Apple World Wide Developer Conference
Wide area file services | WAFS—Wide Area File Services
Web Accessibility Initiative | WAI—Web Accessibility Initiative
Wide area information server | WAIS—Wide Area Information Server
Wide area network | WAN—Wide Area Network
Wireless access point | WAP—Wireless Access Point
Wireless Application Protocol | WAP—Wireless Application Protocol
Open Watcom Assembler | WASM—Watcom ASseMbler
Web-Based Enterprise Management | WBEM—Web-Based Enterprise Management
Web Content Accessibility Guidelines | WCAG—Web Content Accessibility Guidelines
Windows Communication Foundation | WCF—Windows Communication Foundation
Wavelength-division multiplexing | WDM—Wavelength-Division Multiplexing
WebDAV—WWW Distributed Authoring and Versioning
Wired Equivalent Privacy | WEP—Wired Equivalent Privacy
Interrupt | WFI—Wait For Interrupt
WiMAX—Worldwide Interoperability for Microwave Access
WinFS—Windows Future Storage
Windows RunTime | WinRT—Windows RunTime
Windows Internet Name Service | WINS—Windows Internet Name Service
Wireless LAN | WLAN—Wireless Local Area Network
Windows Media Audio | WMA—Windows Media Audio
Windows Management Instrumentation | WMI— Windows Management Instrumentation
Windows Media Video | WMV—Windows Media Video
Windows Push Notification Service | WNS—Windows Push Notification Service
Wake-on-LAN | WOL—Wake-on-LAN
Wake-on-ring | WOR—Wake-on-Ring
Write once, run anywhere | WORA—Write once, run anywhere
Write once, run anywhere | WORE—Write once, run everywhere
Wi-Fi Protected Access | WPA—Wi-Fi Protected Access
Web Proxy Autodiscovery Protocol | WPAD—Web Proxy Autodiscovery Protocol
Personal area network | WPAN—Wireless Personal Area Network
Windows Presentation Foundation | WPF—Windows Presentation Foundation
WS-Discovery | WS-D—Web Services-Discovery
Web Services Description Language | WSDL—Web Services Description Language
Web Services Flow Language | WSFL—Web Services Flow Language
Wireless USB | WUSB—Wireless Universal Serial Bus
Wireless Wide Area Network | WWAN—Wireless Wide Area Network
World Wide Name | WWID—World Wide Identifier
World Wide Name | WWN—World Wide Name
World Wide Web | WWW—World Wide Web
WYSIWYG—What You See Is What You Get
Wireless Zero Configuration | WZC—Wireless Zero Configuration

X

XML Accessibility Guidelines | XAG—XML Accessibility Guidelines
Extensible Application Markup Language | XAML—eXtensible Application Markup Language
X Display Manager (implementation) | XDM—X Window Display Manager
X display manager (program type) | XDMCP—X Display Manager Control Protocol
XCBL—XML Common Business Library
XHTML—eXtensible Hypertext Markup Language
Xilp (Unix software) | XILP—X Interactive ListProc
XML—eXtensible Markup Language
XMMS—X Multimedia System
Extensible Messaging and Presence Protocol | XMPP—eXtensible Messaging and Presence Protocol
Extended memory | XMS—Extended Memory Specification
Xerox Network Systems | XNS—Xerox Network Systems
Cross-platform | XP—Cross-Platform
Extreme Programming | XP—Extreme Programming
XPCOM—Cross Platform Component Object Model
XPInstall | XPI—XPInstall
Interface description language | XPIDL—Cross-Platform IDL
Open XML Paper Specification | XPS— XML Paper Specification
XML Schema (W3C) | XSD—XML Schema Definition
Extensible Stylesheet Language | XSL—eXtensible Stylesheet Language
XSL Formatting Objects | XSL-FO—eXtensible Stylesheet Language Formatting Objects
XSL Transformations | XSLT—eXtensible Stylesheet Language Transformations
Cross-site scripting | XSS—Cross-Site Scripting
eXtensible Tag Framework | XTF—eXtensible Tag Framework
eXtended Triton Format | XTF—eXtended Triton Format
XUL—XML User Interface Language
XVGA—Extended Video Graphics Adapter

Y

Year 2000 problem | Y2K—Year Two Thousand
YAAF—Yet Another Application Framework
Yacc | YACC—Yet Another Compiler Compiler
YAML—YAML Ain't Markup Language
YaST—Yet another Setup Tool

Z

Zone bit recording | ZCAV—Zone Constant Angular Velocity
Zero code suppression | ZCS—Zero Code Suppression
Zero insertion force | ZIF—Zero Insertion Force
Zero insertion force | ZIFS—Zero Insertion Force Socket
Zip (file format) | ZIP—ZIP file archive
Zero instruction set computer | ZISC—Zero Instruction Set Computer
Zero One Infinity | ZOI—Zero One Infinity
Zope | ZOPE—Z Object Publishing Environment
Zone Multicast Address | ZMA—Zone Multicast Address
ZPL (programming language) | ZPL—Z-level Programming Language

References

http://www.all-acronyms.com

External links

The UNIX Acronym List

Table of Contents

Cybersecurity acronyms

0–9

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

See also

References

External links