| Extension |
Meaning / Link |
| .IBA |
mde infoHandler
Infobase File |
| .IBM |
Image File |
| .ICA |
Citrix File, IOCA
Graphics File |
| .ICB |
Targa Bitmap |
| .ICC |
Kodak Printer Image |
| .ICE |
Archive File |
| .ICL |
Icon Library File
(various) ImageForge/IconForge |
| .ICM |
Image Color Matching
Profile File |
| .ICN |
Icon Program |
| .ICO |
Icon |
| .ICS |
Outlook
Calendar File |
| .ID |
Disk Identification
File |
| .IDB |
MS
Developer Intermediate File |
| .IDD |
MIDI Instrument
Definition |
| .IDE |
Integrated
Development Environment Configuration File |
| .IDF |
MIDI Instruments
Drivers File |
| .IDQ |
Internet Data Query
File |
| .IDX |
Index (multiple
programs) |
| .IEF |
Image File |
| .IF |
QuickBooks Intuit
Interchange Format File |
| .IFF |
Graphic, Sound
(Interchangeable File Format) |
| .IFS |
OS/2
System File, IconForge
Image EXE Library |
| .IGF |
Inset Systems
Metafile |
| .IGS |
IGES-Format |
| .IIF |
QuickBooks for
Windows Interchange File |
| .III |
Intel Phone
Compatible |
| .IL |
Icon Library |
| .IM8 |
Sun Raster Graphic |
| .IMA |
WinImage File |
| .IMF |
ImageForge/ImageForge
Image EXE Library |
| .IMG |
Bitmap Graphic
(several programs), Imaging |
| .IMP |
Urban Chaos Game
File, Lotus Improv Spreadsheet |
| .IN3 |
Harvard
Input Device Driver |
| .INC |
Include File
(various) |
| .IND |
dBase
IV or DataPerfect Index |
| .INF |
Information or Setup
File |
| .INI |
Initialization file
(many) |
| .INK |
Pantone Reference
File |
| .INL |
MS
Visual C++ Inline Function File |
| .INP |
Oracle
Source Code |
| .INS |
Internet
Communication Setting, WordPerfect
File, Ensoniq EPS Family
Instrument, Sample Cell / II Instrument, InstallShield
Script, X-Internet Sign-up File |
| .INT |
Borland
Interface Units, Foxpro
Code Page, Intermediate Code used for syntax checking
(various) |
| .INX |
Foxbase Index |
| .IO |
Compressed Archive |
| .IOB |
Imagine File |
| .IOF |
Findit Document |
| .ION |
Text
Program/Installation Description |
| .IPL |
Corel
Pantone Spot Reference Palette |
| .IPX |
Interactive Pictures
Corporation AV File |
| .IQY |
Excel
Web Query |
| .IRS |
WordPerfect
Resource File |
| .ISD |
RapidFile Dictionary |
| .ISH |
Compressed Archive
File |
| .ISO |
File List for CD-ROM |
| .ISP |
X-Internet Sign-up
File, Internet Communication Settings |
| .ISS |
InstallShield
Response File |
| .IST |
Digitrakker
Instrument File |
| .ISU |
InstallShield
Uninstall Script, Netscape File |
| .IT |
Impulse
Tracker Music Module |
| .ITI |
Impulse
Tracker Instrument |
| .ITS |
Internet Document
Set, Impulse Tracker
Sample |
| .IV |
VRML File, Open
Inventor File |
| .IVF |
Indeo Video File |
| .IW |
Iconware
Application, Idlewild Screensaver |
| .IWA |
IBM Writing
Assistant Text |
| .IWP |
Wang Text File |
| .IX |
Framemaker
Index File |
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