G
<pre>
GA General Availability
GAAP Generally Accepted Accounting Principles
GAC Global Assembly Cache
GAL Generic Array Logic
GAMS General Algebraic Mathematical System
GAPI Gateway Application Programming Interface
GART Graphics Address Relocation Table
GATT Graphics Address Translation Table
GAWD Global Access Wireless Database
Gb Gigabit (1,024 megabits) +
(One Billion Bits of Information)
GB Gigabyte (1,024 megabytes) +
(One Billion Characters of Information)
GCC GNU C-Compiler [Unix]
GCCD Glass-Passivated Ceramic Chip Diode
GCR Group Code Recording
GDA Global Data Area + GNOME Data Access
GDB GNU Debugger
GDDM Graphics Data Display Manager
GDG Generation Data Group [IBM]
GDI Graphical Device Interface
GDLC Generic Data Link Control [IBM]
GDP Graphic Draw Primitive
GDT Geometric Dimensioning and Tolerancing +
Global Descriptor Table +
Graphics Development Toolkit
GECOS General Electric Comprehensive Operating System
GEIS General Electric Information Service (company)
GEM Graphics Environment Manager (DRI Program)
GENIE General Electric Network for
Information Exchange
GEO Geostationary Earth Orbit
GEOS Global Entity Ordering System +
GEOS Graphic Environment Operating System [Geoworks]
GET Get Execute Trigger
GFI General Format Identifier + Ground-Fault Interceptor
GGP Gateway-Gateway Protocol [Internet]
GHZ Gigahertz
.GID Topics (file name extension) [Microsoft]
.GIF Graphics Interchange Format (file name extension)
GIG-E Gigabit Ethernet
GIGO Garbage In, Garbage Out
GII Global Information Infrastructure
GILS Government Information Locator Service
GIMP GNU Image Manipulation Program
GIMPS Great Internet Mersenne Prime Search
GINA Graphical Identification and Authentication
GIS Geographic Information System +
Global Information Solutions [AT&T]
GIX Global Internet Exchange [Internet]
GKS Graphical Kernel System
GL Graphics Language
G/L General Ledger
GLIS Global Land Information System [US Geological Survey]
GLM General Linear Models
GLOBE Global Learning by Observations to Benefit
the Environment [Internet]
.GLY Glossary (file name extension) [Microsoft Word]
GMDI Gigabit Media-Dependent Interface
GML Generalized Markup Language
GMP Global Mobile Professional
GMR Giant Magneto-Resistive (read head technology)
GMS Global Management System +
Global Messaging Service [Novell]
GMT Greenwich Mean Time
GND Ground (signal/system)
GNN Global Network Navigator
GNU Gnu's Not Unix (operating system)
GNOME GNU Network Object Model Environment
GOAD GNOME Object Activation Directory
GOS Grade Of Service
GOSIP Government Open Systems Interconnection Profile
.GOV Governmental (Domain Name) [Internet]
GP Gas Plasma + General Purpose
GPF General Protection Fault
GPI Graphics Programming Interface
GPIB General Purpose Information/Interface Bus
GPIO General Purpose Input/Output
GPL General Public License
GPR General Purpose Register [IBM]
GPRC Glass Passivated Rectifier Chip
GPRS General Packet Radio Service
GPS Global Positioning Satellite/System +
Global Product Specification
GPSS * General Purpose Systems Simulator (language)
GPU Graphics Processing Unit
GRADD Graphics Adapter Device Driver [IBM]
GRE Generic Routing Encapsulation + Graphics Engine
GREP Global Regular Expression Print
.GRF Graph (file name extension)
.GRP Group (file name extension)
GS Group Separator
GSI General Server Interface
GSM Global Shared Memory +
Global System for Mobile-Communications (network)
GSNW Gateway Service for NetWare [Microsoft]
GSP Generic Server Passer + Global Service Provider
GSR Gigabit Switch Router
GSTN General Switched Telephone Network
GTE General Telephone Electronics (corporation)
GTF Generalized Timing Format
GTL Gunning Transceiver Logic
GTO Guide To Operations [IBM]
GTP * Geometry Theorem Prover
GTS Generic Traffic Shaping [Cisco]
GUI Graphical User Interface
GUID Globally Unique Identifier +
Global Universal Identifier
GVT Global Virtual Time
GW-BASIC Gee Whiz BASIC
GWES Graphic, Windowing and Event Subsystem
.gz Compressed file (compressed filename extension -
using GNU gzip compression/decompression program) [Unix]
GZIP GNU Zip
</pre>
H
<pre>
.H Header (file name extension) [C]
HACMP High Availability Cluster Multi-Processing [IBM]
HAL Hard Array Logic + Hardware Abstraction Layer +
House-Programmed Array Logic
HAL * Heuristically Programmed Algorithmic (computer)
[from 1968 movie "2001: A Space Odyssey"]
HAP Host Access Protocol
HARP-MRI Harmonic Phase MRI
HASP Houston Automatic Spooling Priority (System)
HBA Host Bus Adapter
HCL Hardware Compatibility List
HCSS High Capacity Storage System
HCU Home Computer User
HD Hard Disk + High Density
HDA Head Disk Assembly
HDC High Dependability Computing [Carnegie Mellon]
HDCD High Definition Compatible Digital
HDCP High-Bandwidth Digital Content Protection
HDD Hard Disk Drive
HDF Hierarchical Data Format [NCSA]
HDI Head to Disk Interference
HDL Hardware Description Language
HDLC High-Level Data Link Control
HDM Hardware Device Module
HDMI High-Definition Multimedia Interface
HDML Handheld Device Markup Language
HDR Header + High Data Rate
.HDR Header Data (file name extension)
HDSC High Density Signal Carrier [DEC]
HDSL (See DSL)
HDSS Holographic Data Storage System
HDT Host Digital Terminal
HDTV High Definition Television
HDVD High Definition Volumetric Display
HDW Hardware
HDX Half Duplex
HEOS High Earth Orbiting Satellite
HERC Hercules
HEX Hexadecimal
HFC Hybrid Fiber-Coaxial
HFS Hierarchical File System [Macintosh]
HFT High Function Terminal [IBM]
HGA Hercules Graphics Adapter
HGCP Hercules Graphics Card Plus
HGP Human Genome Project
HH Hour
HID Human Interface Device
HIDS Host-Based Intrusion Detection System
HIF Hyper-G Interchange Format
HIFD High-Density Floppy Disk
HIL Human Interface Link [HP]
HIMEM High Memory
HIPPI High Performance Parallel Interface
HLA High Level Architecture
HLCO High Low Close Open
HLL High Level Language
HLLAPI High Level Language Application Programming Interface
.HLP Help (file name extension)
HLQ High Level Qualifier
HLS Hue, Luminance, Saturation (color model)
HLT Halt
HMA High Memory Area [Microsoft] +
Hub Management Architecture
HMD Head Mounted Display
HMI Human-Machine Interface
HMM Hidden Markov Model
HMMP Hyper-Media Management Protocol
HMOS High Density Metal Oxide Semiconductor +
High Speed Metal Oxide Semiconductor
HMP Host Monitoring Protocol
HOL High Order Logic
HOLAP Hybrid OLAP
HOTT Hot Off The Tree (electronic newsletter)
HOV High Occupancy Vehicle
HP Hewlett-Packard (Company)
HPC Handheld Personal Computer
HPCC High Performance Computing and Communications
HPDJ Hewlett-Packard Desk Jet
HPFS High-Performance File System
HPG Hewlett-Packard Graphics
HPGL Hewlett-Packard Graphics Language
HPIB Hewlett-Packard Interface Bus
HPLJ Hewlett-Packard Laser Jet
HPOM Home Page Objects Model [Microsoft]
HPPA Hewlett-Packard Precision Architecture
HPPI High Performance Parallel Interface
HPR High Performance Routing [IBM]
HPSB High Performance Serial Bus
HPTL High Performance Technical Computing
HPUX Hewlett-Packard Unix
HPW High Performance Workstation [Sun]
.HQX BinHex (file name extension) [Macintosh]
HRIS Human Resource Information System
HRG High Resolution Graphics
HRMS Human Resource Management System
HRTF Head Related Transfer Function
HS High Speed
HSB Hue, Saturation, Brightness (color model)
HSC Hierarchical Storage Controller + High Speed Channel
HSI Hue, Saturation, Intensity
HSM Hierarchical Storage Management
HSP High Speed Printer/Processor
HSSI High Speed Serial Interface
HST High Speed Technology [U.S. Robotics]
.HST History + Host (file name extensions)
HSV Hue Saturation Value
HTL Human In The Loop
HTML HyperText Markup Language
HTTP HyperText Transfer Protocol
HTTP-NG HTTP Next Generation
HTTPS HyperText Transfer Protocol Secure
HUD Heads Up Display
HUT Hopkins Ultraviolet Telescope
H/V Horizontal/Vertical
HVP Horizontal & Vertical Position
H/W Hardware
HWCP Hardware Code Page
HWD Height-Width-Depth
HWDM Hyperfine Wave Division Multiplexing
.HYP Hyphenation (file name extension)
HYTELNET Hypertext-browser for Telnet Accessible Sites
Hz Hertz
</pre>
I
<pre>
IA Intel Architecture [Intel]
IAB Internet Architecture Board
IAC Inter-Application Communication [Macintosh]
IAD Integrated Access Device
IAEC International Address Element Code
IAG Instruction Address Generation
IAK Internet Access Kit [IBM]
IAL * International Algebraic Language
(ALGOL was first called IAL)
IANA Internet Assigned Numbers Authority
IAP Internet Access Provider
IAS Internet Access Server
IAT Import Address Table
IAUP Internet User Account Provider
IBC Instrument Bus Computer
iBCS Intel Binary Compatibility Specification
IBIP Information Based Indicia Program [U.S. Postal Service]
IBL Inbound Links [Google]
IBM International Business Machines (Corporation)
IBM-GL IBM Graphics Language
IC Input Circuit + Integrated Circuit + Interrupt Controller
ICA Intelligent Console Architecture +
Intra-application Communications Area
ICANN International Corporation for Assigned Names and Numbers
ICAP Internet Calendar Access Protocol [Lotus]
ICAS Intel Communicating Applications Specifications
ICB Internet Citizen's Band
ICCP Institute for the Certification of
Computing Professionals
ICD International Code Designator
ICE In-Circuit Emulator [Intel] +
Integrated Computing Environment [Langley Research] +
Internal Compiler Error
ICES Interference-Causing Equipment Standard
ICF Internet Connection Firewall [Microsoft]
ICI Image Component Information + Inter-CPU Interrupts
ICL Interface Clear
ICLID Incoming-Call Line Identification
ICM Image Color Matching [Kodak] + Incoming Message
.ICM Image Color Management (file name extension)
ICMP Internet Control Message Protocol [Novell]
.ICO Icon (file name extension)
ICOMP (iCOMP)Intel Comparative Microprocessor
Performance [Intel]
ICP Image Coprocessor + Integrated Channel Processor
ICQ I Seek You (messaging program0
ICR Intelligent Character Recognition
ICS Internet Connection Sharing [Microsoft] +
Intuitive Command Structure
ICSAPI Internet Connection Services API
ICU Instruction-Cache Unit +
Intel Configuration Utility [Microsoft] +
ISA Configuration Utility
ID Identification + Identifier
IDA Integrated Digital Access + Intelligent Disk Array +
Intelligent Drive Array
IDAPI Integrated Database Application Programming Interface
IDC Integrated Database/Desktop Connector +
Internet Database Connector [Microsoft] +
Internet Data Center
IDDE Integrated Development & Debugging Environment [Symantec]
IDE Imbedded Drive Electronics +
Integrated Development Environment [Borland] +
Integrated Device/Drive Electronics +
Intelligent Drive Electronics +
Interactive Design and Engineering +
Interface Design Enhancement
IDEA International Data Encryption Algorithm
IDEN Integrated Data Enhanced Network
IDF Intermediate Distribution Frame
IDI Initial Domain Identifier
IDIV Integer Divide
IDL Interactive Data Language +
Interface Definition Language
IDM Integrated Document Management
IDMS Integrated Data Base Management System
IDNX Integrated Digital Network Exchange [IBM]
IDP Integrated Data Processing
IDR Intelligent Document Recognition
IDS Intrusion Detection System
IDSL (See DSL)
IDT Interface Design Tool + Interrupt Descriptor Table
.IDX Index (file name extension)
IE Internet Explorer [Microsoft]
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics Engineers
IEF Information Engineering Facility
IEMSI Interactive Electronic Mail Standard
Identification
IEN Internet Engineering Notes
IETF Internet Engineering Task Force
IESG Internet Engineering Steering Group
I/F Interface
IFC Internet Foundation Classes
IFD Image File Directory
IFF Interchangeable File Format [Amiga]
IFG Incoming Fax Gateway
IFP Instruction Fetch Pipeline
IFS Installable/Integated File System
IFSM Information Systems Management
IGA Integrated Graphics Array
IGC Integrated Graphics Controller
IGES Initial Graphics Exchange Standard
IGFET Insulated-Gate Field Effect Transistor
IGMP Internet Group Multicast Protocol
IGP Interior Gateway Protocol
IGRP Interior Gateway Routing Protocol [Cisco]
IGS Internet Go Server
IHD Integrated Help Desk [IBM]
IHV Independent Hardware Vendor
IIF Immediate Interface
III Interstate Identification Index [NCIC]
IIOP Internet Inter-ORB Protocol
IIR Immediate Impulse Response
IIS Internet Information Server/Services [Microsoft]
IITF Information Infrastructure Task Force
IKE Internet Key Exchange
IKMP Internet Key Management Protocol
IKP Internet Keyed Payments [IBM]
ILA Image Light Amplifier
ILE Integrated Language Environment [IBM]
ILEC Incumbent Local Exchange Carrier
ILP Instruction-Level Parallelism
ILS International Language Support
IM Instant Messenger
IMAC Internet Macintosh [Apple]
IMACS Image Management and Communication System
IMAP Interactive Mail Access Protocol +
Internet Message Access Protocol
IMAX Maximum Image
IMDB In-Memory Database
IMDS Image Data Stream (format) [IBM]
IME Input Method Editor
IMEI International Mobile Equipment Identifier
IMG Image
.IMG Image Data (file name extension)
IML Initial Microcode Load [IBM]
IMP Information/Interface Message Processor
IMPA Intelligent Multi-Port Adapter [DCA]
IMPI Interoperable Message Passing Interface
IMPP Internet Messaging and Presence Protocol
IMR Internet Monthly Report
IMS Information Management System +
Intermediate Maintenance Standards
IMSI International Mobile Subscriber Identifier
IMSP Internet Message Support Protocol
IMTC International Multimedia Teleconferencing Consortium
IMTV Interactive Multimedia Television
IMUL Integer Multiply
IMUX Inverse Multiplexer
IN Input
INC Increment
.IND Index (file name extension)
.INF Information (file name extension)
.INFO Information Services (Domain Name) [Internet]
INFS Internet Network File System
.INI Initialize (file name extension)
INIT Initialization + Initialize
INM Integrated Network Management
INND Internet News Daemon
INS Input String + Integrated Network Server
INT Integer + Internal + Interrupt +
.INT International Organization (Domain name) [Internet]
INTA Interrupt Acknowledge
INTEL Integrated Electronics (company)
INTERNIC (InterNIC)Internet Network Information Center
INTO Interrupt if Overflow occurs
I2O Intelligent Input/Output
I/O Input/Output
IOC Inter-Office Channel
IOCC Input/Output Channel Converter +
Input/Output Controller Chip
IOCS Input/Output Control System
IOCTL Input/Output Control
IODE Integrated Development and Debugging
Environment [Symantec]
IOF Infrared Optical Film
IOP Input/Output Processor
IOPL Input/Output Privilege Level
IOR Interoperable Object Reference
IOS Internet Operating System
IOSGA Input/Output Support Gate Array
IP Instruction Pointer + Intellectual Property +
Internet Protocol
IPBF Installed Peripheral Base Flexibility
IPC Instructions Per Clock + Interprocess Communication
IPCMOS Interlocked Pipeline CMOS [IBM]
IPCP Internet Protocol Control Protocol
IPCS Integrated PC Server
IPDC Internet Protocol Device Control
IPDS IBM Personal Dictation System [IBM] +
Intelligent Printer Data Stream [IBM]
IPF Invalid Page Format
IPFC Information Presentation Facility Compiler [IBM]
IPI Intelligent Peripheral Interface
IPL Initial Program Load/Loader +
Ion Projection Lithography
IPL * Information Programming Language
IPM Images Per Minute + Interpersonal Message
IPMI Intelligent Platform Management Interface
IPNG Internet Protocol, next generation
IPP Integrated Performance Primitives [Intel] +
Internet Printing Protocol
IPR Intellectual Property Rights
IPSE Integrated Project Support Environment
IPSEC Internet Protocol Security
IPTC International Press Telecommunications Council
IPX Internetwork Packet Exchange [Novell]
IQL Interactive Query Language
IR Infrared
IRC Internet Relay Chat
IRD Integrated Receiver/Descrambler
IRDA (IrDA)Infrared Data Association
IRDS Information Resource Dictionary System
IRET Interrupt Return
IRF Intermediate Routing Function +
Inheritance Rights Filter [Novell]
IRL Interactive Reader Language + Inter-Repeater Link
IRLAP Infrared Link Access Protocol
IRLED Infrared Light Emitting Diode
IRM Information Resource Management + Inherent Rights Mask
IRP I/O Request Packet
IRQ Interrupt Request
IRQL Interrupt Request Level
IRTF Internet Research Task Force
IRX Information Retrieval Experiment
IS Information System + Interrupt Status
ISA Industry Standard Architecture (bus) [IBM] +
Instruction-Set Architecture
ISAKMP Internet Security Association and Key Management Protocol
ISAM Indexed Sequential-Access Management/Method
ISAPI Internet Server API [Microsoft]
ISBN International Standard Book Number
ISC Instruction Set Computer + Inter-Systems
Communication [IBM]
ISCSI (iSCSI) Internet SCSI
ISD Image Section Descriptor +
Instructional Systems Design
ISDN Integrated Services Digital Network
ISH Information Super Highway
ISI Internally Specified Index
ISIS Integrated Systems and Information Services
ISKM Internet Starter Kit for the Macintosh
ISL Interactive System Language +
Inter Switch Link [Cisco]
ISM Integrated Services Model [IETF] +
Internet Service Manager [Microsoft]
ISMF Interactive Storage Management Facility
ISOC Internet Society
ISO International Organization for Standardization
ISP Internet Service Provider + Interrupt Stack Pointer +
Interrupt Status Port
ISPF Interactive System Programming Facility
ISR Information Storage and Retrieval +
Interrupt Service Routine +
Interrupt Status Register
ISRC International Standard Recording Code
ISS Internet Sharing Software
ISSN International Standard Serial Number
ISV Independent Software Vendor
IT Information Technology
ITB Information Technology Branch + Intermediate Text Block
ITC International Typeface Corporation
ITE Information Technology Equipment
ITF Interactive Test Facility
ITIL Information Technology Infrastructure Library
ITN Identification Tasking and Networking
ITP Internet Transaction Processing
ITR Information Technology Research [NSF] +
Input Transaction Record + Internet Talk Radio
ITSM Information Technology Service Management
ITU International Telecommunications Union
ITUG International Telecommunications User Group
ITU-TIES ITU-Telecom Information Exchange Services
ITU-TSS ITU-Telecommunication Standards Section
ITV Interactive Television
ITX Intermediate Text Block
IU Integer Unit
IUAP Internet User Account Provider
IUS/ITB Interchange Unit Separator/Intermediate Transmission
Block
IVDS Integrated Voice and Data Systems
IVIS Interactive Video Information System
IVL Independent Vendor League + Intel Verification Lab
IVR Interactive Voice Response
IVS Interactive Videodisk System
IVT Interrupt Vector Table
IV&V Independent Verification & Validation
I-WAY Information Highway
IXC Interexchange Carrier
</pre>
<pre>
GA General Availability
GAAP Generally Accepted Accounting Principles
GAC Global Assembly Cache
GAL Generic Array Logic
GAMS General Algebraic Mathematical System
GAPI Gateway Application Programming Interface
GART Graphics Address Relocation Table
GATT Graphics Address Translation Table
GAWD Global Access Wireless Database
Gb Gigabit (1,024 megabits) +
(One Billion Bits of Information)
GB Gigabyte (1,024 megabytes) +
(One Billion Characters of Information)
GCC GNU C-Compiler [Unix]
GCCD Glass-Passivated Ceramic Chip Diode
GCR Group Code Recording
GDA Global Data Area + GNOME Data Access
GDB GNU Debugger
GDDM Graphics Data Display Manager
GDG Generation Data Group [IBM]
GDI Graphical Device Interface
GDLC Generic Data Link Control [IBM]
GDP Graphic Draw Primitive
GDT Geometric Dimensioning and Tolerancing +
Global Descriptor Table +
Graphics Development Toolkit
GECOS General Electric Comprehensive Operating System
GEIS General Electric Information Service (company)
GEM Graphics Environment Manager (DRI Program)
GENIE General Electric Network for
Information Exchange
GEO Geostationary Earth Orbit
GEOS Global Entity Ordering System +
GEOS Graphic Environment Operating System [Geoworks]
GET Get Execute Trigger
GFI General Format Identifier + Ground-Fault Interceptor
GGP Gateway-Gateway Protocol [Internet]
GHZ Gigahertz
.GID Topics (file name extension) [Microsoft]
.GIF Graphics Interchange Format (file name extension)
GIG-E Gigabit Ethernet
GIGO Garbage In, Garbage Out
GII Global Information Infrastructure
GILS Government Information Locator Service
GIMP GNU Image Manipulation Program
GIMPS Great Internet Mersenne Prime Search
GINA Graphical Identification and Authentication
GIS Geographic Information System +
Global Information Solutions [AT&T]
GIX Global Internet Exchange [Internet]
GKS Graphical Kernel System
GL Graphics Language
G/L General Ledger
GLIS Global Land Information System [US Geological Survey]
GLM General Linear Models
GLOBE Global Learning by Observations to Benefit
the Environment [Internet]
.GLY Glossary (file name extension) [Microsoft Word]
GMDI Gigabit Media-Dependent Interface
GML Generalized Markup Language
GMP Global Mobile Professional
GMR Giant Magneto-Resistive (read head technology)
GMS Global Management System +
Global Messaging Service [Novell]
GMT Greenwich Mean Time
GND Ground (signal/system)
GNN Global Network Navigator
GNU Gnu's Not Unix (operating system)
GNOME GNU Network Object Model Environment
GOAD GNOME Object Activation Directory
GOS Grade Of Service
GOSIP Government Open Systems Interconnection Profile
.GOV Governmental (Domain Name) [Internet]
GP Gas Plasma + General Purpose
GPF General Protection Fault
GPI Graphics Programming Interface
GPIB General Purpose Information/Interface Bus
GPIO General Purpose Input/Output
GPL General Public License
GPR General Purpose Register [IBM]
GPRC Glass Passivated Rectifier Chip
GPRS General Packet Radio Service
GPS Global Positioning Satellite/System +
Global Product Specification
GPSS * General Purpose Systems Simulator (language)
GPU Graphics Processing Unit
GRADD Graphics Adapter Device Driver [IBM]
GRE Generic Routing Encapsulation + Graphics Engine
GREP Global Regular Expression Print
.GRF Graph (file name extension)
.GRP Group (file name extension)
GS Group Separator
GSI General Server Interface
GSM Global Shared Memory +
Global System for Mobile-Communications (network)
GSNW Gateway Service for NetWare [Microsoft]
GSP Generic Server Passer + Global Service Provider
GSR Gigabit Switch Router
GSTN General Switched Telephone Network
GTE General Telephone Electronics (corporation)
GTF Generalized Timing Format
GTL Gunning Transceiver Logic
GTO Guide To Operations [IBM]
GTP * Geometry Theorem Prover
GTS Generic Traffic Shaping [Cisco]
GUI Graphical User Interface
GUID Globally Unique Identifier +
Global Universal Identifier
GVT Global Virtual Time
GW-BASIC Gee Whiz BASIC
GWES Graphic, Windowing and Event Subsystem
.gz Compressed file (compressed filename extension -
using GNU gzip compression/decompression program) [Unix]
GZIP GNU Zip
</pre>
H
<pre>
.H Header (file name extension) [C]
HACMP High Availability Cluster Multi-Processing [IBM]
HAL Hard Array Logic + Hardware Abstraction Layer +
House-Programmed Array Logic
HAL * Heuristically Programmed Algorithmic (computer)
[from 1968 movie "2001: A Space Odyssey"]
HAP Host Access Protocol
HARP-MRI Harmonic Phase MRI
HASP Houston Automatic Spooling Priority (System)
HBA Host Bus Adapter
HCL Hardware Compatibility List
HCSS High Capacity Storage System
HCU Home Computer User
HD Hard Disk + High Density
HDA Head Disk Assembly
HDC High Dependability Computing [Carnegie Mellon]
HDCD High Definition Compatible Digital
HDCP High-Bandwidth Digital Content Protection
HDD Hard Disk Drive
HDF Hierarchical Data Format [NCSA]
HDI Head to Disk Interference
HDL Hardware Description Language
HDLC High-Level Data Link Control
HDM Hardware Device Module
HDMI High-Definition Multimedia Interface
HDML Handheld Device Markup Language
HDR Header + High Data Rate
.HDR Header Data (file name extension)
HDSC High Density Signal Carrier [DEC]
HDSL (See DSL)
HDSS Holographic Data Storage System
HDT Host Digital Terminal
HDTV High Definition Television
HDVD High Definition Volumetric Display
HDW Hardware
HDX Half Duplex
HEOS High Earth Orbiting Satellite
HERC Hercules
HEX Hexadecimal
HFC Hybrid Fiber-Coaxial
HFS Hierarchical File System [Macintosh]
HFT High Function Terminal [IBM]
HGA Hercules Graphics Adapter
HGCP Hercules Graphics Card Plus
HGP Human Genome Project
HH Hour
HID Human Interface Device
HIDS Host-Based Intrusion Detection System
HIF Hyper-G Interchange Format
HIFD High-Density Floppy Disk
HIL Human Interface Link [HP]
HIMEM High Memory
HIPPI High Performance Parallel Interface
HLA High Level Architecture
HLCO High Low Close Open
HLL High Level Language
HLLAPI High Level Language Application Programming Interface
.HLP Help (file name extension)
HLQ High Level Qualifier
HLS Hue, Luminance, Saturation (color model)
HLT Halt
HMA High Memory Area [Microsoft] +
Hub Management Architecture
HMD Head Mounted Display
HMI Human-Machine Interface
HMM Hidden Markov Model
HMMP Hyper-Media Management Protocol
HMOS High Density Metal Oxide Semiconductor +
High Speed Metal Oxide Semiconductor
HMP Host Monitoring Protocol
HOL High Order Logic
HOLAP Hybrid OLAP
HOTT Hot Off The Tree (electronic newsletter)
HOV High Occupancy Vehicle
HP Hewlett-Packard (Company)
HPC Handheld Personal Computer
HPCC High Performance Computing and Communications
HPDJ Hewlett-Packard Desk Jet
HPFS High-Performance File System
HPG Hewlett-Packard Graphics
HPGL Hewlett-Packard Graphics Language
HPIB Hewlett-Packard Interface Bus
HPLJ Hewlett-Packard Laser Jet
HPOM Home Page Objects Model [Microsoft]
HPPA Hewlett-Packard Precision Architecture
HPPI High Performance Parallel Interface
HPR High Performance Routing [IBM]
HPSB High Performance Serial Bus
HPTL High Performance Technical Computing
HPUX Hewlett-Packard Unix
HPW High Performance Workstation [Sun]
.HQX BinHex (file name extension) [Macintosh]
HRIS Human Resource Information System
HRG High Resolution Graphics
HRMS Human Resource Management System
HRTF Head Related Transfer Function
HS High Speed
HSB Hue, Saturation, Brightness (color model)
HSC Hierarchical Storage Controller + High Speed Channel
HSI Hue, Saturation, Intensity
HSM Hierarchical Storage Management
HSP High Speed Printer/Processor
HSSI High Speed Serial Interface
HST High Speed Technology [U.S. Robotics]
.HST History + Host (file name extensions)
HSV Hue Saturation Value
HTL Human In The Loop
HTML HyperText Markup Language
HTTP HyperText Transfer Protocol
HTTP-NG HTTP Next Generation
HTTPS HyperText Transfer Protocol Secure
HUD Heads Up Display
HUT Hopkins Ultraviolet Telescope
H/V Horizontal/Vertical
HVP Horizontal & Vertical Position
H/W Hardware
HWCP Hardware Code Page
HWD Height-Width-Depth
HWDM Hyperfine Wave Division Multiplexing
.HYP Hyphenation (file name extension)
HYTELNET Hypertext-browser for Telnet Accessible Sites
Hz Hertz
</pre>
I
<pre>
IA Intel Architecture [Intel]
IAB Internet Architecture Board
IAC Inter-Application Communication [Macintosh]
IAD Integrated Access Device
IAEC International Address Element Code
IAG Instruction Address Generation
IAK Internet Access Kit [IBM]
IAL * International Algebraic Language
(ALGOL was first called IAL)
IANA Internet Assigned Numbers Authority
IAP Internet Access Provider
IAS Internet Access Server
IAT Import Address Table
IAUP Internet User Account Provider
IBC Instrument Bus Computer
iBCS Intel Binary Compatibility Specification
IBIP Information Based Indicia Program [U.S. Postal Service]
IBL Inbound Links [Google]
IBM International Business Machines (Corporation)
IBM-GL IBM Graphics Language
IC Input Circuit + Integrated Circuit + Interrupt Controller
ICA Intelligent Console Architecture +
Intra-application Communications Area
ICANN International Corporation for Assigned Names and Numbers
ICAP Internet Calendar Access Protocol [Lotus]
ICAS Intel Communicating Applications Specifications
ICB Internet Citizen's Band
ICCP Institute for the Certification of
Computing Professionals
ICD International Code Designator
ICE In-Circuit Emulator [Intel] +
Integrated Computing Environment [Langley Research] +
Internal Compiler Error
ICES Interference-Causing Equipment Standard
ICF Internet Connection Firewall [Microsoft]
ICI Image Component Information + Inter-CPU Interrupts
ICL Interface Clear
ICLID Incoming-Call Line Identification
ICM Image Color Matching [Kodak] + Incoming Message
.ICM Image Color Management (file name extension)
ICMP Internet Control Message Protocol [Novell]
.ICO Icon (file name extension)
ICOMP (iCOMP)Intel Comparative Microprocessor
Performance [Intel]
ICP Image Coprocessor + Integrated Channel Processor
ICQ I Seek You (messaging program0
ICR Intelligent Character Recognition
ICS Internet Connection Sharing [Microsoft] +
Intuitive Command Structure
ICSAPI Internet Connection Services API
ICU Instruction-Cache Unit +
Intel Configuration Utility [Microsoft] +
ISA Configuration Utility
ID Identification + Identifier
IDA Integrated Digital Access + Intelligent Disk Array +
Intelligent Drive Array
IDAPI Integrated Database Application Programming Interface
IDC Integrated Database/Desktop Connector +
Internet Database Connector [Microsoft] +
Internet Data Center
IDDE Integrated Development & Debugging Environment [Symantec]
IDE Imbedded Drive Electronics +
Integrated Development Environment [Borland] +
Integrated Device/Drive Electronics +
Intelligent Drive Electronics +
Interactive Design and Engineering +
Interface Design Enhancement
IDEA International Data Encryption Algorithm
IDEN Integrated Data Enhanced Network
IDF Intermediate Distribution Frame
IDI Initial Domain Identifier
IDIV Integer Divide
IDL Interactive Data Language +
Interface Definition Language
IDM Integrated Document Management
IDMS Integrated Data Base Management System
IDNX Integrated Digital Network Exchange [IBM]
IDP Integrated Data Processing
IDR Intelligent Document Recognition
IDS Intrusion Detection System
IDSL (See DSL)
IDT Interface Design Tool + Interrupt Descriptor Table
.IDX Index (file name extension)
IE Internet Explorer [Microsoft]
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics Engineers
IEF Information Engineering Facility
IEMSI Interactive Electronic Mail Standard
Identification
IEN Internet Engineering Notes
IETF Internet Engineering Task Force
IESG Internet Engineering Steering Group
I/F Interface
IFC Internet Foundation Classes
IFD Image File Directory
IFF Interchangeable File Format [Amiga]
IFG Incoming Fax Gateway
IFP Instruction Fetch Pipeline
IFS Installable/Integated File System
IFSM Information Systems Management
IGA Integrated Graphics Array
IGC Integrated Graphics Controller
IGES Initial Graphics Exchange Standard
IGFET Insulated-Gate Field Effect Transistor
IGMP Internet Group Multicast Protocol
IGP Interior Gateway Protocol
IGRP Interior Gateway Routing Protocol [Cisco]
IGS Internet Go Server
IHD Integrated Help Desk [IBM]
IHV Independent Hardware Vendor
IIF Immediate Interface
III Interstate Identification Index [NCIC]
IIOP Internet Inter-ORB Protocol
IIR Immediate Impulse Response
IIS Internet Information Server/Services [Microsoft]
IITF Information Infrastructure Task Force
IKE Internet Key Exchange
IKMP Internet Key Management Protocol
IKP Internet Keyed Payments [IBM]
ILA Image Light Amplifier
ILE Integrated Language Environment [IBM]
ILEC Incumbent Local Exchange Carrier
ILP Instruction-Level Parallelism
ILS International Language Support
IM Instant Messenger
IMAC Internet Macintosh [Apple]
IMACS Image Management and Communication System
IMAP Interactive Mail Access Protocol +
Internet Message Access Protocol
IMAX Maximum Image
IMDB In-Memory Database
IMDS Image Data Stream (format) [IBM]
IME Input Method Editor
IMEI International Mobile Equipment Identifier
IMG Image
.IMG Image Data (file name extension)
IML Initial Microcode Load [IBM]
IMP Information/Interface Message Processor
IMPA Intelligent Multi-Port Adapter [DCA]
IMPI Interoperable Message Passing Interface
IMPP Internet Messaging and Presence Protocol
IMR Internet Monthly Report
IMS Information Management System +
Intermediate Maintenance Standards
IMSI International Mobile Subscriber Identifier
IMSP Internet Message Support Protocol
IMTC International Multimedia Teleconferencing Consortium
IMTV Interactive Multimedia Television
IMUL Integer Multiply
IMUX Inverse Multiplexer
IN Input
INC Increment
.IND Index (file name extension)
.INF Information (file name extension)
.INFO Information Services (Domain Name) [Internet]
INFS Internet Network File System
.INI Initialize (file name extension)
INIT Initialization + Initialize
INM Integrated Network Management
INND Internet News Daemon
INS Input String + Integrated Network Server
INT Integer + Internal + Interrupt +
.INT International Organization (Domain name) [Internet]
INTA Interrupt Acknowledge
INTEL Integrated Electronics (company)
INTERNIC (InterNIC)Internet Network Information Center
INTO Interrupt if Overflow occurs
I2O Intelligent Input/Output
I/O Input/Output
IOC Inter-Office Channel
IOCC Input/Output Channel Converter +
Input/Output Controller Chip
IOCS Input/Output Control System
IOCTL Input/Output Control
IODE Integrated Development and Debugging
Environment [Symantec]
IOF Infrared Optical Film
IOP Input/Output Processor
IOPL Input/Output Privilege Level
IOR Interoperable Object Reference
IOS Internet Operating System
IOSGA Input/Output Support Gate Array
IP Instruction Pointer + Intellectual Property +
Internet Protocol
IPBF Installed Peripheral Base Flexibility
IPC Instructions Per Clock + Interprocess Communication
IPCMOS Interlocked Pipeline CMOS [IBM]
IPCP Internet Protocol Control Protocol
IPCS Integrated PC Server
IPDC Internet Protocol Device Control
IPDS IBM Personal Dictation System [IBM] +
Intelligent Printer Data Stream [IBM]
IPF Invalid Page Format
IPFC Information Presentation Facility Compiler [IBM]
IPI Intelligent Peripheral Interface
IPL Initial Program Load/Loader +
Ion Projection Lithography
IPL * Information Programming Language
IPM Images Per Minute + Interpersonal Message
IPMI Intelligent Platform Management Interface
IPNG Internet Protocol, next generation
IPP Integrated Performance Primitives [Intel] +
Internet Printing Protocol
IPR Intellectual Property Rights
IPSE Integrated Project Support Environment
IPSEC Internet Protocol Security
IPTC International Press Telecommunications Council
IPX Internetwork Packet Exchange [Novell]
IQL Interactive Query Language
IR Infrared
IRC Internet Relay Chat
IRD Integrated Receiver/Descrambler
IRDA (IrDA)Infrared Data Association
IRDS Information Resource Dictionary System
IRET Interrupt Return
IRF Intermediate Routing Function +
Inheritance Rights Filter [Novell]
IRL Interactive Reader Language + Inter-Repeater Link
IRLAP Infrared Link Access Protocol
IRLED Infrared Light Emitting Diode
IRM Information Resource Management + Inherent Rights Mask
IRP I/O Request Packet
IRQ Interrupt Request
IRQL Interrupt Request Level
IRTF Internet Research Task Force
IRX Information Retrieval Experiment
IS Information System + Interrupt Status
ISA Industry Standard Architecture (bus) [IBM] +
Instruction-Set Architecture
ISAKMP Internet Security Association and Key Management Protocol
ISAM Indexed Sequential-Access Management/Method
ISAPI Internet Server API [Microsoft]
ISBN International Standard Book Number
ISC Instruction Set Computer + Inter-Systems
Communication [IBM]
ISCSI (iSCSI) Internet SCSI
ISD Image Section Descriptor +
Instructional Systems Design
ISDN Integrated Services Digital Network
ISH Information Super Highway
ISI Internally Specified Index
ISIS Integrated Systems and Information Services
ISKM Internet Starter Kit for the Macintosh
ISL Interactive System Language +
Inter Switch Link [Cisco]
ISM Integrated Services Model [IETF] +
Internet Service Manager [Microsoft]
ISMF Interactive Storage Management Facility
ISOC Internet Society
ISO International Organization for Standardization
ISP Internet Service Provider + Interrupt Stack Pointer +
Interrupt Status Port
ISPF Interactive System Programming Facility
ISR Information Storage and Retrieval +
Interrupt Service Routine +
Interrupt Status Register
ISRC International Standard Recording Code
ISS Internet Sharing Software
ISSN International Standard Serial Number
ISV Independent Software Vendor
IT Information Technology
ITB Information Technology Branch + Intermediate Text Block
ITC International Typeface Corporation
ITE Information Technology Equipment
ITF Interactive Test Facility
ITIL Information Technology Infrastructure Library
ITN Identification Tasking and Networking
ITP Internet Transaction Processing
ITR Information Technology Research [NSF] +
Input Transaction Record + Internet Talk Radio
ITSM Information Technology Service Management
ITU International Telecommunications Union
ITUG International Telecommunications User Group
ITU-TIES ITU-Telecom Information Exchange Services
ITU-TSS ITU-Telecommunication Standards Section
ITV Interactive Television
ITX Intermediate Text Block
IU Integer Unit
IUAP Internet User Account Provider
IUS/ITB Interchange Unit Separator/Intermediate Transmission
Block
IVDS Integrated Voice and Data Systems
IVIS Interactive Video Information System
IVL Independent Vendor League + Intel Verification Lab
IVR Interactive Voice Response
IVS Interactive Videodisk System
IVT Interrupt Vector Table
IV&V Independent Verification & Validation
I-WAY Information Highway
IXC Interexchange Carrier
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