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I Acronyms

Acronyms that start with Letter I


Acronym Meaning / Link
I2O I2O split driver architecture
IA Intel Architecture or Information Appliance
IAB Internet Activities Board or Internet Architecture Board
IAD Integrated Access Device
IBM International Business Machines or Inferior But Marketable; It's Better Manually; It's Been Malfunctioning; Incontinent Bowel Movement; etc.
IBS IntelSat Business Service
IC Integrated Circuit
ICA Independent Computing Architecture
ICANN Internet Corporation for Assigned Names and Numbers
ICC Integrated Circuit Card
ICCID Integrated Circuit Card ID
ICE Intrusion Countermeasure Electronics or In-Circuit Emulator
ICMP Internet Control Message Protocol


Independent Content Provider

ICR Intelligent Character Recognition
ICRIS Integrated Customer Record Information System
ICS Internet Connection Sharing
IDCT Inverse Discrete Cosine Transform for digital TV (usually written iDCT)
IDE Integrated Drive Electronics or Interactive Development Environment
IDF Intermediate Distribution Frame
IDMS Integrated Document Management Solutions
IDSL ISDN Digital Subscriber Line
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronic Engineers (involved with standards)
IEN Integrated Enterprise Network
IESG Internet Engineering Steering Group
IETF Internet Engineering Task Force
IFM Intelligent Flow Management
IGES Initial Graphics Exchange Specification (ANSI standard for CAD/CAM)
IGMP Internet Group Multicast Protocol or Internet Group Managment Protocol
IGP Internet Gateway Protocol


Independent Hardware Vendor

IIOP Internet Inter-ORB Protocol
IIS Internet Information Services
ILEC Incumbent Local Exchange Carrier (see also CLEC)
IMAP Internet Messaging Access Protocol
IMC Initial Microcode Load
IMG As in image (GEM raster file format)
IMP Interface Message Processor
IMT Inter-Machine Trunk  - High capacity connection between switches (e.g. DMS-250 to DMS-250).
IN Intelligent Network
INFO As in .info - INFOrmational web site  (See our list of TLDs here)
INTELSAT International Telecommunications Satellite Organization
InterNIC Internet Network Information Center
INWG International Network Working Group
I/O Input/output
IOS Inter-Network Operating System or International Organization for Standardization
IP Internet Protocol
IPC Internet Proxy Cache or Inter-process Communication
IPL Initial Program Load or Internet Public Library
IPLC International Private Leased Circuit
IPMI Internet Provider Multicast Initiative
IPN Internet Protocol Number
IPng Internet Protocol - Next Generation
IPP Internet Presence Provider
IPS Internet Presence or Provider Service or In-Plane Switching (touch screen monitor technology)
IPv4 Internet Protocol in use today
IPv6 Internet Protocol in use for Internet2
IPX Inter-network Packet Exchange
IRAN Inspect and Repair As Necessary, a maintenance procedure.
IRC Internet Relay Chat


Integrated Receiver Decoder

IRF Inherited Rights Filter
IRQ Interrupt - Request
IRTF Internet Research Task Force
IRTOS I2O Real-Time Operating System
IS Irrational Screening (I.S. Technology is a Linotype-Hell trademark) or International Standard
ISA Industry Standard Architecture or Interactive Services Association
ISAM Indexed Sequential Access Method
ISDN Integrated Services Digital Network or often not-so-affectionately referred to as "It Still Does Nothing"
ISIS Internally Switched Interface System or Investigative Support Information System
ISM Internet Service Manager


Interactive Storage Management Facility

ISN Initial Sequence Number in TCP connections
ISO International Organization for Standardization (often incorrectly identified as International Standards Organization)
ISP Internet Service Provider or Instruction Set Processor or In-System Programming
ISPA Inverted Socket Process Architecture
ISPF/PDF Interactive System Productivity Facility / Program Development Facility
ISV Independent Software Vendor
IT Information Technology
ITIL Information Technology Infrastructure Library v1, v2, v3
ITS Internet Telephony Server or Transit Intelligent Transportation Systems
ITU International Telecommunications Union
ITV Interactive TeleVision
IVR Interactive Voice Response
IVRU Interactive Voice Response Unit
IWM Integrated Woz Machine
IXC IntereXchange Carrier
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