| File extension Name |
extension description |
| .I | C++ Preprocessor Intermediate File (Borland Software Corporation) |
| .I | APLAC Source Code Data File (APLAC) |
| .I | INTERCAL File |
| .I | Progress Database Include File (Progress Software Corporation) |
| .I | Phase Vocorder Analysis Data |
| .I | Integra Database (Imagina Software) |
| .I | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .I-E | i-Enforce Security File (ICM Conversions & Management) |
| .I0 | Winter Windows Scheduler File |
| .I00 | (100-103) Winphone Phonebook |
| .I16 | Nokia Phone Logo File (Nokia) |
| .I17 | Pixel Power Collage |
| .I18 | Pixel Power Collage |
| .I1C | IBM Voice Type Language Newuser File |
| .I1I | IBM Voice Type Language Newuser File |
| .I2C | IBM Voice Type Language Newuser File |
| .I2D | Wyse Device Management Thin Client Disk Image File (WYSE) |
| .I2I | IBM Voice Type Language Newuser File |
| .I2S | Invision for mIRC Settings |
| .I3 | Modula-3 Interface Source |
| .I3C | IBM Voice Type Language Newuser File |
| .I3F | I3 Fax File (Interactive Intelligence Inc.) |
| .I3I | IBM Voice Type Language Newuser File |
| .I3ML | I3ML Source Page |
| .I66 | Interactive66 Graphic Design Information |
| .IA | Roland Garros Tennis Person File |
| .IA6 | IApproach Data File (Workfile) (Tdata, Inc.) |
| .IAF | Outlook Express Account Settings (Microsoft Corporation) |
| .IAF | Outlook 97 and 2000 E-mail Account Settings (Microsoft Corporation) |
| .IAF | IAFA Document |
| .IAF | Informer Configuration (Dataconomy) |
| .IAF | Windows Live Mail Contacts Database (Microsoft Corporation) |
| .IAF | Quikscribe Intelligent Audio File (Quikscribe Pty Ltd) |
| .IAFA | IAFA Document |
| .IAM | Inventor CAD (Autodesk, Inc.) |
| .IAN | Sterling Software COOL Business Team Model File |
| .IAO | ImperiumAO Data File (Imperium) |
| .IAP | Iguana Active Server Active Page Script (ILan Game) |
| .IAP | TeamBG File |
| .IAP | ASM Palette |
| .IAR | CD Katalog (KRISoftware) |
| .IAS | Iguana Active Server Script (ILan Game) |
| .IAX | IBM Image Access Executive Bitmap |
| .IB7 | Pixel Power Collage |
| .IBA | InfoHandler Infobase File (MDE Software) |
| .IBA | Image |
| .IBA | IBasic Source Code File |
| .IBC | IncrediBar Cursor File (IncrediMail Ltd.) |
| .IBD | PDS Picture |
| .IBD | Windows Installer File (Microsoft Corporation) |
| .IBF | Instant Backup (Towodo Software) |
| .IBG | NASA PDS Graphic Format |
| .IBG | Bert's Dinosaurs File |
| .IBG | iBridge Project Workspace (i2 Inc.) |
| .IBK | Sound Blaster Instrument Bank (Creative Technology Ltd.) |
| .IBK | ICE Book Reader Professional Book File (ICE Graphics) |
| .IBK | (Kodak) Imaging for Windows Bookmark (Microsoft Corporation) |
| .IBK | National Construction Estimator 32 Picture File |
| .IBL | IBasic Component Language File |
| .IBL | PCLTool Index-by-Location File (Page Technology Marketing, Inc.) |
| .IBM | Commodore Amiga Graphics |
| .IBM | Archdos Compressed File |
| .IBP | IsoBuster CD/DVD Layout File (Smart Projects) |
| .IBQ | IsoBuster Optical Media Data Container File (Smart Projects) |
| .IBS | IncrediBar Skin (IncrediMail Ltd.) |
| .IBS | i2 iBase File |
| .IBT | IBTracer Infiniband Link And Protocol Analyzer InfiniBand Trace File (Computer Access Technology Corporation) |
| .IBX | Interscope BlackBox File |
| .IBY | ROM Image Component Include File |
| .IC | Spice Initial Condition |
| .IC | Modula-3 M3CG Intermediate Language File |
| .IC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IC1 | ZyIMAGE Index |
| .IC1 | Imagic Bitmap Graphic |
| .IC2 | IMagic Bitmap Graphic |
| .IC3 | IMagic Bitmap Graphic |
| .ICA | Identity Compass Encrypted Answers (Identity Compass International GmbH.) |
| .ICA | Image Object Content Architecture (IOCA) Graphics File |
| .ICA | Citrix Independent Computer Architecture File (Citrix) |
| .ICAL | iCalendar Calendar Data (Apple Inc.) |
| .ICALENDAR | iCalendar Calendar Data (Apple Inc.) |
| .ICB | Image Capture Board |
| .ICB | Targa Bitmap |
| .ICC | IronCAD Catalog |
| .ICC | ArtIcons Pro Icon Collection (Aha-Soft) |
| .ICC | Animation Softdisk |
| .ICC | Apple ColorSync 2.0 (Apple Inc.) |
| .ICC | ICC Profile Format File |
| .ICC | Kodak Printer Image |
| .ICCP | Identity Compass Encrypted Culture Profile (Identity Compass International GmbH.) |
| .ICD | SafeDisc Encrypted Digital Rights Management File (Acresso Software Inc.) |
| .ICD | ASTi Model Builder |
| .ICD | File Associated with Many Games |
| .ICD | IronCAD 2D CAD File |
| .ICD | Rate Structure File |
| .ICD | Rayman2 Game File |
| .ICD | Actuate Information Object Cache Definition (Actuate Corporation) |
| .ICDX | Home Organizer Document (Imagery Concepts, LLC) |
| .ICDX | FilePic Document (Imagery Concepts, LLC) |
| .ICE | Archive |
| .ICE | Freeze! Compressed Archive (Reeve Soft) |
| .ICE | Cooltalk Audio |
| .ICEICEBABY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ICF | RapidForm INUS Compression Format File (INUS Technology, Inc.) |
| .ICF | Insane Chat Saved Conversation |
| .ICF | INI Creator for X10 Remote Control |
| .ICF | ICOM CS-2100 Radio Programming Data |
| .ICF | Cheyenne AntiVirus |
| .ICG | Image Comparer Image Comparison Results (Bolide Software) |
| .ICL | Clean File |
| .ICL | Icon Library File |
| .ICM | Windows Color Matching Control (Microsoft Corporation) |
| .ICM | ICC Profile, Acer Monitor Drive |
| .ICM | Earl F. Glynn Color Tablecolor Table |
| .ICM | Image Color Matching Profile File (Kodak) |
| .ICMP | Internet Control Message Protocol |
| .ICMS | Ragtime Extensions File |
| .ICN | Bert's Dinosaurs File |
| .ICN | AT&T Graphic Format |
| .ICN | RIPTerm Image |
| .ICN | Micrografx Icon |
| .ICN | HP Palmtop 100/200LX Icon |
| .ICN | SunOS Mono Icon |
| .ICN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ICN | Icon Programming Language Source Code File |
| .ICNS | Macintosh OS X Icon File (Apple Inc.) |
| .ICO | Windows Icon (Microsoft Corporation) |
| .ICO | GIMP Icon (The GIMP Team) |
| .ICO | Sun Icon/Cursor |
| .ICO | OS/2 Icon |
| .icon | UNIX Icon/Cursor |
| .ICON | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ICON2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ICONES | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ICONS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ICONS1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ICONS2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ICP | Identity Compass Encrypted Profile (Identity Compass International GmbH.) |
| .ICP | InterCept File |
| .ICP | UNIX Icontact Parameter File |
| .ICPR | ArtIcons Pro IconProject (Aha-Soft) |
| .ICQ | ICQ Saved File (ICQ Inc.) |
| .ICR | NCSA Telnet Interactive Color Raster Graphic |
| .ICS | CopyControl Generic Copier Floppy Disk Image (Microcosm Ltd.) |
| .ICS | SwiftView ICS Command File (SwiftView, Inc.) |
| .ICS | Outlook Calendar File (Microsoft Corporation) |
| .ICS | IronCAD 3D CAD File |
| .ICS | iCalendar Calendar Data (Apple Inc.) |
| .ICS | Inovate 3D CAD File |
| .ICS | Image Cytometry |
| .ICT | TIFF and ISO Image Related File |
| .ICTX | FilePic Transport Container (Imagery Concepts, LLC) |
| .ICTX | Home Organizer Transport Container (Imagery Concepts, LLC) |
| .ICV | In Chair Viewing |
| .ICV | Bond .AVI Film |
| .ICW | Icon |
| .ICW | MS Internet Explorer Internet Connect Wizard |
| .ICW | InterCAD File |
| .ICX | More Than Words File |
| .ICX | VisualAge Smalltalk Enterprise Program Image File (IBM) |
| .IC_ | Compressed LCT File |
| .ID | Gamecode |
| .ID | Notes ID File (IBM) |
| .ID | 3D Graphic |
| .ID | Disk Identification File |
| .ID | AOL Instant Messenger (AIM) Buddy Icon (America Online, Inc.) |
| .ID | Pegasus Mail (David Harris) |
| .ID | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ID | MS Data Map (Microsoft Corporation) |
| .ID3 | ID3 Resource |
| .IDA | IIS Server File (Microsoft Corporation) |
| .IDAPI | Integrated Database Application Programming Interface (Borland Software Corporation) |
| .IDB | IDEA! Project Management Database (SYCON Gmbh) |
| .IDB | MS Developer Intermediate MDPX File |
| .IDB | Database Used by Disassembler |
| .IDB | Developer Intermediate File (Microsoft Corporation) |
| .IDB | Delphi Pascal Object File |
| .IDB | A-B-CD Info File |
| .IDC | IDA C-like Language Source Code |
| .IDC | Internet Database Connector Document |
| .IDC | Structured Query Language (SQL) |
| .IDC | Core IDC |
| .IDD | MIDI Instrument Definition |
| .IDD | Complete Works Database-related File (Toplevel Computing) |
| .IDE | ideCAD Architectural Architectural 3D Design Model (ideYAPI Ltd. Sti.) |
| .IDE | ideCAD Structural Structural 3D Design Model (ideYAPI Ltd. Sti.) |
| .IDE | C++ Project (Borland Software Corporation) |
| .IDE | Grand Theft Auto III Model IDs and Properties (Rockstar Games) |
| .IDE | Sophos Anti-Virus Virus Identity File |
| .IDE | Integrated Development Environment Configuration File |
| .IDEA | Brainbloom Document (Gael Limited) |
| .IDEAS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IDEMO | Instant Demo Project File (NetPlay Software) |
| .IDENTIFIER | Internet Explorer Zone Identification Information (Microsoft Corporation) |
| .IDF | InspireData File (Inspiration Software, Inc.) |
| .IDF | MIDI Instruments Definition File (Microsoft Corporation) |
| .IDF | ARTiSAN Real-time Studio ID |
| .IDF | Identification File |
| .IDF | Printed Circuit Board Data Exchange File |
| .IDI | i-deas Web ACCESS File |
| .IDIF | Netscape Saved Address Book |
| .IDK | OS/2 Saved SKF Format File (IBM) |
| .IDL | CRiSP Harvest File |
| .IDL | Visual C++ Interface Definition File (Microsoft Corporation) |
| .IDL | Snappy Devdocs |
| .IDL | OMG CORBA Interface Definition Language |
| .IDLK | InDesign Lock File (Adobe Systems Incorporated) |
| .IDM | Fahrenheit The Game - DAT + IDM Archive (Quantic Dream) |
| .IDM | Ulead Photo Express Messages File (Corel Corporation) |
| .IDMEF | Snort File |
| .IDOL | Idle Scripting Language Object Library - Bytecode (Thomas Lauer) |
| .IDQ | Internet Data Query File |
| .IDQ | Structured Query Language (SQL) Query |
| .IDR | CompactDRAW Object(s) (MediaChance) |
| .IDS | IDA Imported Names Format |
| .IDS | Minos 3D Data File |
| .IDS | WFO-A Data |
| .IDS | Infinity Game Engine Numbers to Description Map (BioWare Corp.) |
| .IDS | Infini-D Scene File |
| .IDSP | Gamecube Streamed Audio File (Nintendo) |
| .IDT | Windows Installer File (Microsoft Corporation) |
| .IDT | Identification |
| .IDT | Text Archive Table |
| .IDT | Output of DLL2IDT Utility |
| .IDU | Interleaf Desktop Utility (BroadVision) |
| .IDV | Inventor Design View Tree (Autodesk, Inc.) |
| .IDW | Inventor CAD (Autodesk, Inc.) |
| .IDW | IntelliDraw Vector Graphic (Adobe Systems Incorporated) |
| .IDWORDCOUNT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IDX | AOL Temporary Internet Mail File |
| .IDX | Stork Format Header Information |
| .IDX | Outlook Express Mailbox Index (Microsoft Corporation) |
| .IDX | LaTeX Index |
| .IDX | Index |
| .IDX | Pro/ENGINEER Index File (PTC) |
| .IDX | Java Applet Cache Index (Sun Microsystems, Inc.) |
| .IDX | FoxPro Index (Microsoft Corporation) |
| .IDX | FAX File |
| .IDX | ArcView Geocoding Index For Read-Only Datasets (ESRI) |
| .IDX | Corel QuickFinder Information |
| .IDX | Clip Gallery 1.x Index (Microsoft Corporation) |
| .IDX | Ca Visual Objects Platform for Developer (CAVO) Index File (CA) |
| .IDX | RCA/Lyra Handheld MP3 Player Database Index (RCA) |
| .IDX | Symantec Q&A Relational Database Index File (Symantec Corporation) |
| .IDX | NoX |
| .IDX | Complete Works Index File (Toplevel Computing) |
| .IDX | ICQ Index (ICQ Inc.) |
| .IDX | VSFilter Index File |
| .IDY | Index File |
| .IDY | Debug Information File |
| .IDZ | i-deas Web ACCESS File |
| .ID_ | C Poet Compressed Disk1 File |
| .IE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IE1-3 | Internet Explorer 3 Address Book |
| .IE3 | Internet Explorer 3 File |
| .IEE-695 | IEEE 695 Information (Hewlett Packard) |
| .IEF | Image File |
| .IEL | particleIllusion SE Emitter Library (wondertouch, LLC) |
| .IEL | Erazer98 File |
| .IEM | Informix Error Message |
| .IEPK | IE Privacy Keeper Program Settings File (BrowserTools.net) |
| .IES | IESNA Photometric File Data (Illuminating Engineering Society) |
| .IET | IETheme Internet Explorer Theme (Eye Can Publishing) |
| .IF9 | Pixel Power Collage |
| .IFB | Siebel Interface Configuration File (Siebel Systems) |
| .IFC | All Image Compressed Image File (Towodo Software) |
| .IFD | Jet Form Design Form |
| .IFF | DESR VFF Greyscale Bitmap Image |
| .IFF | Amiga Sound (Amiga) |
| .IFF | Amiga Bitmap Graphic (Amiga) |
| .IFF | TextCraft Document |
| .IFF | Maya IFF Bitmap |
| .IFF | Simple Musical Score |
| .IFF | Deluxe Paint Image (Electronic Arts, Inc.) |
| .IFF | Philips CDI File |
| .IFF | ProWrite Document |
| .IFF | Sun TAAC Image File |
| .IFF | The Sims Object/Data File (Electronic Arts (Maxis)) |
| .IFF | TDI Explore & Alias Wavefront Image |
| .IFI | inFlow Inventory Database Backup File (inFlow Inventory Software) |
| .IFILE | Amaya i386 File |
| .IFL | 3ds Max Animation File List Control (Autodesk, Inc.) |
| .IFL | Descent 3 Ship Graphic |
| .IFM | Shana Informed Filler |
| .IFM | Brighterion iPrevent Fraud Model |
| .IFM | IFS Applications Message File (IFS AB) |
| .IFN | Amma Lsb v1.0 Initialization |
| .IFO | DVD Info File |
| .IFO | Info File |
| .IFO | ImageForge Pro Graphic Object Layer Data |
| .IFO | BioWare Aurora Engine Information File (BioWare Corp.) |
| .IFP | KnowledgeMan Script |
| .IFR | Formula 1 Racing Databin Cars Common File |
| .IFS | InfoSlips Secure Information Package (InfoSlips) |
| .IFS | Fractint Iterated Function System Fractal |
| .IFS | IconForge Image EXE Library |
| .IFS | OS/2 Warp Installable File System |
| .IFS | Yuvpak Compressed Fractal Image |
| .IFS | Fractint Iterated Function System Parameters |
| .IFU | All Image Uncompressed Image File (Towodo Software) |
| .IFX | IMAGINE Effect File |
| .IFX | Rational XDE (IBM) |
| .IFX | ImageSoft v2.00 Graphic |
| .IFX | Fax File |
| .IG | Modula-3 Generic Interface Source |
| .IGC | SeeYou Flight Data (Naviter) |
| .IGES | Initial 2D/3D Graphics Exchange Specification |
| .IGES | IGES-Format |
| .IGF | Inset Systems Metafile |
| .IGF | Vector Graphic |
| .IGF | Image Systems |
| .IGF | Hijack Graphic Bitmap |
| .IGF | Sound file |
| .IGJ | iGrafx Published Web Content (iGrafx, a division of Corel Inc.) |
| .IGL | inSORS IGLayout Layout File |
| .IGL | IGOR Saved Level File (Elmer Productions) |
| .IGM | inSORS IGClient Meeting File |
| .IGN | ICQ Igonre List (ICQ Inc.) |
| .IGNORE | Likely a Text File Some programs write out a temporary file with an extension like .IGNORE. |
| .IGP | Igor Reader Sheet Music File |
| .IGP | InfoGest Configuration/Profile Settings (S.C. NVN Group S.R.L.) |
| .IGP | IGOR Player File (Elmer Productions) |
| .IGR | SmartSketch Drawing (Intergraph Corporation) |
| .IGS | CAD Overlay |
| .IGS | Image Systems Grayscale, 8-bits |
| .IGS | IGES-Format |
| .IGV | inSORS IGClient Venue File |
| .IGX | Process (iGrafx (a division of Corel Inc.)) |
| .IHP | Watcom Help File |
| .IHS | Bink Inbound History |
| .IHT | Intranet Connector Script File (SCORT) |
| .IHTML | Inline HyperText Markup Language (Inline Internet Systems, Inc.) |
| .II | Gcc Preprocessed C++ Source Code |
| .II | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .II2 | i-Installer Remote Installation Format (Gerben Wierda & Tom Hageman) |
| .IIB | Notes Incremental Install Backup File (IBM) |
| .IID | Tonline BSW4 Fnstall Lid File |
| .IID | i-Installer i-Directory (Gerben Wierda & Tom Hageman) |
| .IIE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IIF | QuickBooks Import/Export Interchange File (Intuit, Inc.) |
| .IIGS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .III | Intel IPhone Compatible File (Intel) |
| .III | ARC+ Drawing (ACA) |
| .III | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .III | Know Your Stuff Home Inventory File (Insurance Information Institute) |
| .IIL | Norton CleanSweep Installation Log (Symantec Corporation) |
| .IIM | Music Module |
| .IIM | iOpus Internet Macro (iOpus GmbH) |
| .IIM | Interscope InstallMaster Setup Project |
| .IIM | Inshape Graphic |
| .IIMG | Interleaf Graphic |
| .IIO | CoreFSIF Database (Avanticore, Inc.) |
| .IIT | Install Maker Install Info File (Clickteam) |
| .IIX | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IIX | Rational XDE (IBM) |
| .IJS | J Interpretor Script File |
| .IJX | J Language Execution Window (Source Code) (Jsoftware) |
| .IK | Ioke Script (Ioke Team) |
| .IKL | InkBall (Microsoft Corporation) |
| .IKLAX | iKlax Creator Audio Format (iKlax) |
| .IKO | Windows Icon Resource |
| .IKS | InkSeine Document (Microsoft Corporation) |
| .IKS | KBOX Heroes Card Fix File (KBOX Team) |
| .IKX | iKlax Creator Audio Format (iKlax) |
| .IL | MSIL Assembler Input File (Microsoft Corporation) |
| .IL | Icon Library |
| .IL | FORTRAN 90 Inline Expansion File |
| .IL | Euphoria Shrouded Source Code (Rapid Deployment Software) |
| .IL3 | particleIllusion 3 Emitter Library (wondertouch, LLC) |
| .ILB | Scream Tracker Data |
| .ILBM | Amiga Sound |
| .ILBM | Amiga Interleaved Bitmap Format (Amiga) |
| .ILBM | Deluxe Paint Graphic (Electronic Arts, Inc.) |
| .ILD | International Laser Display Association Frame Vector List for Laser Light Shows (International Laser Display Association) |
| .ILF | Omniscope Application-Specific Data (Iokio Ltd) |
| .ILF | SMS Insight Log File (Ag Leader Technology, Inc.) |
| .ILG | InstallShield Log File (Acresso Software Inc.) |
| .ILG | TeX MakeIndex Track File |
| .ILHT | Safari Internet Location (Apple Inc.) |
| .ILK | Ilink Program Format Outline (Microsoft Corporation) |
| .ILL | Illustrator Prologue (Adobe Systems Incorporated) |
| .ILL | ILL Transaction File |
| .ILL | Agati Illustrated Image |
| .ILL | 2D Graphic |
| .ILM | Amiga IFF Image (Amiga) |
| .ILM | CAS 200 QDA v3.0 Image List Mode File |
| .ILM | Iomega Zip Drive Speed Configuration File |
| .ILM | Opus Creator Multimedia File (Digital Workshop) |
| .ILM | Satsang Quiz File |
| .ILPLOPTIONS | InterLock and PowerLock |
| .ILPLVOUCHERS | InterLock and PowerLock |
| .ILS | Win3 Windows Word File |
| .ILS | Internet Security And Acceleration Server Summary (Microsoft Corporation) |
| .ILSR | Iomega Reader |
| .ILV | ILOG View File |
| .ILVG | iLiving P-to-P |
| .ILX | Interlex Vocabulary (Andrew Quilley) |
| .IM | Sun Raster File |
| .IM | 3D Graphic |
| .IM | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IM | AOL Instant Messenger (AIM) Grey Scale Image (America Online, Inc.) |
| .IM04 | Image Sun Raster |
| .IM1 | Sun Raster File |
| .IM24 | Bitmap Graphic |
| .IM30 | Image Sun Raster |
| .IM32 | Bitmap Graphic |
| .IM5 | Visilog (NorPix, Inc.) |
| .IM5 | Visilog |
| .IM7 | DaVis Graphic (LaVision GmbH) |
| .IM8 | Sun Raster Graphic |
| .IM? | 2D Graphic |
| .IMA | IncrediMail Animation (IncrediMail Ltd.) |
| .IMA | Mirage Vector Graphics |
| .IMA | EGO - Chart - Autumn Mirage Vector Graphic |
| .IMA | AOL Instant Messenger (AIM) Grey Scale Image (America Online, Inc.) |
| .IMA | Zenographics Image |
| .IMA | WinImage File |
| .IMA | ImageMixer (Pixela Corporation) |
| .IMAGE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IMAGE | Disk Copy, ShrinkWrap Disk Image |
| .IMAGE | Squeak Code File |
| .image | UNIX Bitmap Source |
| .IMAGINE | Object & Texture Imagine 3.0 |
| .IMAKE | Imake File |
| .IMB | IncrediMail Address Book and Temporary Contacts (IncrediMail Ltd.) |
| .IMC | LucasArts Game Audio File (Lucasfilm Entertainment Company Ltd.) |
| .IMC | MontagePlus Thumbnail Image Collection (Serif Europe Ltd.) |
| .IMC | IncrediMail (IncrediMail) |
| .IMD | Caseware IDEA |
| .IME | IncrediMail Emoticons (IncrediMail Ltd.) |
| .IME | Global Input Method Editor (Microsoft Corporation) |
| .IME | iMelody Ringtone Format (Infrared Data Association) |
| .IMELODY | iMelody Ringtone Format (Infrared Data Association) |
| .IMESHDEF | iMesh Skin (iMesh) |
| .IMF | MIDI Music File |
| .IMF | IncrediMail Letter/eCard (IncrediMail Ltd.) |
| .IMF | ImageForge/ImageForge Image EXE Library Saved Filtered Brush |
| .IMG | Img Software Set Bitmap |
| .IMG | All Image Raw Image (Towodo Software) |
| .IMG | QEMU Qcow Disk Image (Fabrice Bellard) |
| .IMG | Disk Copy, ShrinkWrap Disk Image |
| .IMG | ERDAS IMAGINE Image Format (Leica Geosystems , LLC) |
| .IMG | ADEX Corporation ChromaGraph Graphics Card Bitmap Graphic |
| .IMG | Alias Bitmap Graphic |
| .IMG | AutoCAD CAD-Camera (Autodesk, Inc.) |
| .IMG | Bitmap Graphic |
| .IMG | CloneCD Image (SlySoft Inc.) |
| .IMG | Radiance Scene Description Image |
| .IMG | Grand Theft Auto III File (Rockstar Games) |
| .IMG | Starbase |
| .IMG | Planetary Data System |
| .IMG | Image Whatnot / Erdas Imagine MIS / Radiance / Starbase |
| .IMG | Vivid Ray-tracer |
| .IMG | Idrisi32 Raster Image |
| .IMG | Grand Theft Auto III .DFF and .TXD Archive (Rockstar Games) |
| .IMG | Vicar |
| .IMG | Ventura Publisher/GEM VDI Image Format Bitmap |
| .IMG | Apple Macintosh Disk Copy Format (Apple Inc.) |
| .IMG | Sharp GPB |
| .IMG | Garmin Basemap (Garmin Ltd.) |
| .IMG | Microtek Eyestar |
| .IMG3 | Img3 Encrypted/Signed Container |
| .IMGSAO | Aleph One Images (Marathon Open Source) |
| .IMH | IncrediMail Data File (IncrediMail Ltd.) |
| .IMI | IncrediMail Animation (IncrediMail Ltd.) |
| .IMI | Turbo Pascal DOS File (Borland Software Corporation) |
| .IMJ | Pegasus Image Corp Bitmap |
| .IMJ | JFIF File With a Microsoft Windows BMP Header |
| .IMK | IncrediMail License License (IncrediMail Ltd.) |
| .IML | ACT! Internet Mail Message File (Best Software CRM Division) |
| .IMM | IncrediMail Trash (IncrediMail Ltd.) |
| .IMN | IncrediMail Notifier (IncrediMail Ltd.) |
| .IMO | iMON Setting File (SoundGraph.Inc) |
| .IMOVIEPROJ | iMovie Project (Apple Inc.) |
| .IMP | Pascal Implementation |
| .IMP | Improv Spreadsheet (IBM) |
| .IMP | Crayola Art Image |
| .IMP | FileMaker Database Translation Filter |
| .IMP | Babya Installer Archive |
| .IMP | TEX-DESIGN Clothing Design File (Koppermann Computersysteme GmbH) |
| .IMP | Adobe Audition Convolution Effect (Adobe Systems Incorporated) |
| .IMP | Bentley CloudWorx High Definition Surveying High Resolution Image (Bentley Systems, Incorporated) |
| .IMP | WinIMP Archive (Technelysium Pty Ltd) |
| .IMP | Urban Chaos Game File |
| .IMP | Gemstar eBook Publisher eBook (Gemstar eBook) |
| .IMP | DVD File |
| .IMPLEMENT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IMQ | ImageQ Presentation |
| .IMQ | NASA Planetary Image |
| .IMR | Impromptu Report Writer Report (Cognos Incorporated) |
| .IMR | IncrediMail Notifier (IncrediMail Ltd.) |
| .IMR | Information Magic Data File (RM) |
| .IMS | Rebel Assault File |
| .IMS | IconForge |
| .IMS | IMS Content Package (IMS Global Learning Consortium, Inc.) |
| .IMS | SiteSpinner Project (Virtual Mechanics Inc.) |
| .IMS | Music File |
| .IMS | IncrediMail Graphic Skin (IncrediMail Ltd.) |
| .IMSP | Survey Pro Survey File (iMagic Software) |
| .IMT | egseing Image Mode |
| .IMT | IMNET Image |
| .IMU | Star Wars Force Commander Game Audio (Lucasfilm Ltd.) |
| .IMV | Yahoo! Instant Messenger IMVironment |
| .IMV | ImageMixerVCD Project File (Pixela Corporation) |
| .IMW | Imageware Surfacer 3D CAD Surface Geometry |
| .IMW | IncrediMail Sound (IncrediMail Ltd.) |
| .IMX | DaVis Binary Image File (LaVision GmbH) |
| .IMX | SAS SAS/IML Workshop Matrix (SAS Institute Inc.) |
| .IMY | iMelody Ringtone Format (Infrared Data Association) |
| .IMZ | Floppy Image Compressed Image (Towodo Software) |
| .IMZ | WinImage Compressed Disk Image (Gilles Vollant Software) |
| .IM_ | Improve Compressed Audio File |
| .IN | smartGENERATOR Template (BITPlan) |
| .in | GNU Autoconf Configuration Template |
| .IN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IN | McAfee Antivirus |
| .IN | CFAST Input File (U.S. Commerce Department) |
| .IN$ | HP NewWave Install File |
| .IN0 | INI Backup |
| .IN1 | INI Backup |
| .IN3 | Harvard Graphics Input Device Driver (Harvard Graphics) |
| .IN4 | InfoBlaster IN4 Registry Library (UIC Phoenxsoftware) |
| .IN7 | Ox Object-Oriented Matrix Programming Language PcGive 7 Data File |
| .INA | DOS File |
| .INB | Motorola L7 Phone MMS Graphic (Motorola, Inc.) |
| .INB | Rebel Assault Backup |
| .INB | Vermont HighTest Script |
| .INB | Visual Expert Source Code Documentation |
| .INC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INC | JAWS for Windows Text File (Freedom Scientific) |
| .INC | PovRay 2 or 3 |
| .INC | Spice Include File Subcircuit |
| .INC | Internet Connection File |
| .INC | Include File |
| .INC | Astro Windows |
| .INC | Assembler Language or Active Server Include File |
| .INC | Active Server Include File |
| .INC | Wincommander Include File |
| .INC | PSpice Include File (Cadence Design Systems, Inc.) |
| .INC | MS-Backup Incremental File |
| .INCA | InCopy/InDesign File (Adobe Systems Incorporated) |
| .INCD | InCopy/InDesign Link File (Adobe Systems Incorporated) |
| .INCH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INCT | InCopy/InDesign File (Adobe Systems Incorporated) |
| .INCX | InCopy/InDesign File (Adobe Systems Incorporated) |
| .IND | XMap Dataset Index (Delorme) |
| .IND | Notes List files for Compact Task on Domino Server (IBM) |
| .IND | Windows/Applog Index |
| .IND | Foxmail E-Mail Box Index |
| .IND | InDesign Publication (Adobe Systems Incorporated) |
| .IND | Windows Shared Database File |
| .IND | Well of Souls Game File |
| .IND | LaTeX or TeX Makeindx Index |
| .IND | dBASE IV |
| .INDD | InDesign Document (Adobe Systems Incorporated) |
| .INDENT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INDESIGNPLUGIN | InDesign Plug-in (Adobe Systems Incorporated) |
| .INDEX | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INDEX | Index File |
| .INDIGO | Indigo Graphics Format [Eddi Litvak] |
| .INE | Imagination Configuration Settings (Foxpertise) |
| .INF | OS/2 2.0 Information Presentation Facility (IPF) Data Format OS/2 PTR file : Cursor image file |
| .INF | Type 1 LaserJet Font Information File |
| .INF | Type Manager Font Information (Adobe Systems Incorporated) |
| .INF | Pro/ENGINEER Temporary File (PTC) |
| .INF | Information or Setup File |
| .INF | OS/2 Buch Hypertext Help System File |
| .INF | BLUEWAVE Information File |
| .INF | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INF | Autorun File |
| .INF1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INFINI-D | Infini-D 3.0 Format |
| .INFO | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .info | UNIX GNU Info Reader File |
| .INFO | ZoomBrowser Image Index (Canon, Inc.) |
| .INFO | Amiga Icon (Amiga) |
| .INFO1 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INFO2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INFO3 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INFO4 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ING | INGVAR Forestry Simulation (Skogforsk) |
| .ING | MasterCook Ingredients |
| .INGR | Intergraph Raster File Format (Intergraph Corporation) |
| .INH | Visual Basic Basfwin File |
| .INI | Gravis UltraSound Bank Setup File |
| .INI | Initialization/Configuration File |
| .INI | MWave DSP Synth's GM-setup File: MWSYNTH.INI |
| .INI | Simple Exchange Rate Information File Format (SERIFF) |
| .INIT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INK | Tablet PC Digital Ink File (Microsoft Corporation) |
| .INK | Mimio Ink File |
| .INK | Intkey Startup Configuration File (DELTA Authors) |
| .INK | Ink Markup Language File (W3C) |
| .INK | Pantone Reference File |
| .INKBL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INKML | Ink Markup Language File (W3C) |
| .INL | Visual C++ Inline Function File (Microsoft Corporation) |
| .INLOVE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INLX | InDesign Library Interchange (Adobe Systems Incorporated) |
| .INM | Fax Master File |
| .INN | PHANTASMAGORIA INI File |
| .INN | COBOL/2 Overlay (Micro Focus) |
| .INN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INO | Inor IPRO Software File |
| .INO | Inno Setup Script Files File |
| .INP | Oracle Source Code |
| .INP | CHARMM Input File |
| .INP | GIS Software Text Input File |
| .INP | Self-Extracting Archive Utility Project |
| .INP | InPage Document (Concept Software) |
| .INP | MacMolPlt GAMESS Input format |
| .INP | FRANC2D Mesh File |
| .INP | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INP | EnCorr Input File (Morningstar) |
| .INP | ABAQUS Input File (ABAQUS, Inc.) |
| .INP | Tramo-Seats Input Specification File (Bank of Spain) |
| .INPUT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INQ | Piped Technology Internet Query Configuration File (Queensgate Systems Ltd) |
| .INRS | INRS-Telecommunications Sound |
| .INS | Ensoniq EPS Family Instrument (E-MU Systems) |
| .INS | IIS Internet Communications Settings (Microsoft Corporation) |
| .INS | Inspiration Mind Mapping Software File (Inspiration Software, Inc.) |
| .INS | InstallShield Script (Acresso Software Inc.) |
| .INS | Sample Cell / II Instrument |
| .INS | AdLib Instrument Music File |
| .INS | 1st Reader Install Script |
| .INS | REAKTOR Instrument (Native Instruments) |
| .ins | LaTeX Install File for docstrip |
| .INS | WinAHX THX Tracker Instrument (Abyss) |
| .INS | WordPerfect (Corel Corporation) |
| .INS | Systems Management Server (SMS) Advertising Instruction File (Microsoft Corporation) |
| .INS | PUT Compressed File Archive (MicroFox Company) |
| .INSCRIBE | InScribe 2004 Egyptian Hieroglyphs Document (Saqqara Technology Ltd.) |
| .INSID | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INSPECT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INST | Object Oriented Graphics Library (OOGL) |
| .INST | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INST | 3D Graphic |
| .INST2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INSTALL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INSTALL | Likely a Text File |
| .INSTALLER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INSTR | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INSTRUC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INSTRUCT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INSURANCE | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INSURANCE2 | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INT | Signature Semi-compiled Program |
| .INT | Unreal Tournament Mutator |
| .INT | Devastation Language File (NovaLogic) |
| .INT | Intermediate Code Used for Syntax Checking |
| .INT | Foxpro Code Page (Microsoft Corporation) |
| .INT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INT | Delphi Interface Unit (Borland Software Corporation) |
| .INTEGER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INTER | Interspector Project File |
| .INTEREST | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INTERIEUR | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INTERLEAV | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INTERLOCKFAVOURITES | InterLock and PowerLock |
| .INTERNETMAILSEND | Internet Mail Send Powertoy File |
| .INTERRUPT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INTKEY | Intkey Startup Configuration File (DELTA Authors) |
| .INTMATH | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INTO | Interspector Object File |
| .INTREC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INTRO | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INTRODUCT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INTRODUCTION | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INU | INSPEC Configuration File |
| .INV | dnaLIMS Invoice File (dnaTools) |
| .INV | Medlin Accounting Current Year Checks and Invoices (Medlin Accounting) |
| .INV | Lineage Inventory File (NC Interactive, Inc.) |
| .INV | Rainbow Six: Rogue Spear Inventory File (Red Storm Entertainment, Inc.) |
| .INV | Windows Update file |
| .INV | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INVADERS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INVEN | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INVENTOR | Open Inventor File Translator How To [SGI] |
| .INVENTORY | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INVERT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .INV_LOWRES | Rainbow Six: Rogue Spear Inventory File (Red Storm Entertainment, Inc.) |
| .INX | Rational XDE (IBM) |
| .INX | Foxpro Foxbase Index |
| .INX | InstallShield Compiled Rules File (Acresso Software Inc.) |
| .INX | ACL for Windows Index |
| .IN_ | Setup Information (Microsoft Corporation) |
| .IN~ | King's Quest 7, Grabriel Knight, Compressed File |
| .IO | IO Language Script (Steve Dekorte) |
| .IO | Modula-3 Object File |
| .IO | Compressed Archive |
| .IOB | TDDD Format 3D Graphic Database |
| .IOB | Turbo Silver TDDDB Format |
| .IOB | Imagine File |
| .IOB | iOnly ME Website Generator Backup (iOnly) |
| .IOB | 3D Object TDDDB Format |
| .IOB | Imagine Ver. 1 or 2 TDDDB Format |
| .IOB | Actuate Information Object (Actuate Corporation) |
| .IOC | Instant ORGcharting! Organization Chart |
| .IOC | Winamp Io Plug-in (File: IMGORG.IOC) (Nullsoft) |
| .IOCA | Image Object Content Architecture (IOCA) Graphics File |
| .IOD | DVGate DVMotion In/Out List |
| .IOF | Findit Document |
| .IOF | Findit Document (Microsoft Corporation) |
| .IOK | Omniscope Data and Configuration File (Visokio) |
| .IOM | Omniscope Data and Configuration File (Visokio) |
| .ION | NewsLeecher Description File (newsleecher.com) |
| .ION | 4DOS File Description |
| .ION | Mascot Data |
| .ION | Installation Description |
| .IOP | iOnly ME Website Generator File (iOnly) |
| .IP | Interactive Physics Data (Design Simulation Technologies, Inc.) |
| .IP | Internet Protocol |
| .IP | IconPackager Theme (Stardock Corporation) |
| .IP | Profile |
| .IP | NRC Inspection Manual Inspection Procedures |
| .IP3 | particleIllusion 3 Project (wondertouch, LLC) |
| .IPA | iPhone/iPod Touch Application (Apple Inc.) |
| .IPC | IncrediFlash Tools Image File (IncrediTools Software) |
| .IPC | Interactive Publisher Pro Church Edition Project Data (Interactive Software Designs) |
| .IPCC | iTunes iPhone Carrier Update (Apple Inc.) |
| .IPD | InstallPROG 6 EDBS Install Database |
| .IPD | ImpactCAD Drawing (Arden Software) |
| .IPD | BlackBerry Backup File (Research In Motion Limited) |
| .IPE | Microth Stroke Set (Microth, Inc.) |
| .IPE | Wacom Pen SYSTEM.INI and WIN.INI Backup |
| .IPE | ItsPersonal File |
| .IPF | particleIllusion SE Project (wondertouch, LLC) |
| .IPF | F-Secure Incremental Policy File (F-Secure) |
| .IPF | Grand Theft Auto III Animation Data (Rockstar Games) |
| .IPF | Interchangeable Preservation Format (Classic Amiga Preservation Society) |
| .IPF | SMS Installer Script (Microsoft Corporation) |
| .IPG | Mindjongg Format |
| .IPG | iPod Game Package (Apple Inc.) |
| .IPH | InterPaint Hires Image |
| .IPJ | InfinityQS SPC Project File (InfinityQS International) |
| .IPJ | Inventor Project (Autodesk, Inc.) |
| .IPK | Sharp Zaurus PDA Application Install File |
| .IPK | Nintendo DS Packed Images |
| .IPK | NRG iPack File |
| .IPK | internet PacKage Archive (direct Netware Group) |
| .IPL | Grand Theft Auto III Object Placement Data (Rockstar Games) |
| .IPL | InstallPROG 6 EDBS File Library |
| .IPL | IPLab IPLab-format Image File (BD Biosciences) |
| .IPL | Ink Palette |
| .IPL | Corel Pantone Spot Reference Palette |
| .IPL | PLATO Web Learning Network (PWLN) Temporary File (PLATO Learning, Inc.) |
| .IPL22 | PLATO Web Learning Network (PWLN) Temporary File (PLATO Learning, Inc.) |
| .IPLI | IPLab Graphic |
| .IPM | Image Pro Plus Ver. 5 Macro (Media Cybernetics Inc.) |
| .IPN | Inventor Presentation (Autodesk, Inc.) |
| .IPOD | Rockbox Executable Application (The Rockbox Crew) |
| .IPP | Help & Manual Proprietary Image (EC Software GmbH) |
| .IPR | InstallShield Project (Acresso Software Inc.) |
| .IPR | IntelliJ Project XML File |
| .IPR | SMART Ideas Document (SMART Technologies Inc.) |
| .IPR | LiveType Animation File (Apple Inc.) |
| .IPS | IPScript File |
| .IPS | MENSI 3Dipsos (MENSI Corporation) |
| .IPS | Game Patch File |
| .IPS | International Patching System Binary Patch File |
| .IPSW | iPhone/iPod Firmware Update File (Apple Inc.) |
| .IPT | The Palace Cyborg Script |
| .IPT | InterPaint Multicolor Image |
| .IPT | Inventor CAD (Autodesk, Inc.) |
| .IPTC | Newswire Profile |
| .IPTHEME | IconPackager Icon Theme Package (Stardock Corporation, Inc.) |
| .IPU | Vocaltech Iphone Internet Phone User File |
| .IPW | UniPlot Graph |
| .IPX | Ipix Spherical Panorama (Enliven Marketing Technologies Corporation) |
| .IPX | Interactive Pictures Corporation AV File |
| .IPZ | ICQ Skin (ICQ Inc.) |
| .IQ | IBM Query File |
| .IQA | AmeriCalc Application |
| .IQB | AmeriCalc Backup |
| .IQC | AmeriCalc Client File |
| .IQC | CADIQ Comparison Analysis Result File (ITI TranscenData) |
| .IQD | AmeriCalc Database |
| .IQD | Webstir File |
| .IQF | Integra 3.0 Query File |
| .IQI | IBM Query |
| .IQJ | CADIQ Specific Tasks/Analysis Details (ITI TranscenData) |
| .IQL | CADIQ Log File (ITI TranscenData) |
| .IQP | ITEM QRAS Project (ITEM Software, Inc.) |
| .IQP | 20-20 Office Sales Exported Quote (20-20 Technologies) |
| .IQR | IBM Query |
| .IQR | CADIQ View Analysis Results (ITI TranscenData) |
| .IQS | CADIQ Summary Log File (ITI TranscenData) |
| .IQS | AmeriCalc Security File |
| .IQT | IBM Query |
| .IQU | AmeriCalc Update |
| .IQY | Excel Web Query (Microsoft Corporation) |
| .IQY | Internet Inquiry (Microsoft Corporation) |
| .IR | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IRC | IRCAM Format Sound |
| .IRC | Nevo Infra-red Device Code (Universal Electronics Inc.) |
| .IRC | jIRCii Script (Raffi) |
| .IRCD | iArcade Game Package (Brooklyn Games, Inc.) |
| .IRD | KBOX Heroes Factory File (KBOX Team) |
| .IRD | Money Temporary File (Microsoft Corporation) |
| .IRD | IRD Append File |
| .IRF | RoomBox 6 IR Code File (Living Control) |
| .IRF | Phonecat2 Ocp97 File |
| .IRI | IRT Cronista Infrared Image (GRAYESS Inc.) |
| .IRI | Thermography Studio Infrared Image (GORATEC Technology GmbH & Co. KG) |
| .IRIS | Silicon Graphics RGB |
| .IRIX | Irix Make File |
| .IRIX6 | Irix 6 File |
| .IRIX64BIT | Irix 64 Bit Make File |
| .IRK | iArcade Game Package (Brooklyn Games, Inc.) |
| .IRL | ILOG JRules ILOG Rule Language File (ILOG, Inc.) |
| .IROCK | rockWare intelliRock Data File (Engius, LLC) |
| .IRP | InfraRecorder Project (Christian Kindahl) |
| .IRS | WordPerfect Resource File (Corel Corporation) |
| .IRTP | Graphicon-2000 Interactive Real-Time PHIGS Graphic |
| .IRV | XMap Workfile (ImageReg) (Delorme) |
| .IRX | Brewer Lamp Irradiation File |
| .IRX | PS2 Modified Elf Object File |
| .IRX | IBM Mainframe Rule File |
| .IRZ | iROS Application Packaging Unit (Interactive Workspaces Project, Stanford University) |
| .IS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IS | Modula-3 Intermediate Assembly File |
| .IS2 | IRT Cronista Infrared Image (GRAYESS Inc.) |
| .IS? | LoseThos CD-ROM Image (Terry A. Davis) |
| .ISB | IS-Builder Link File (NPO Computer) |
| .ISBN | HM3 Tutorial Software |
| .ISC | Xilinx Integrated Software Environment Device Configuration Information (Xilinx, Inc.) |
| .ISC | iScreensaver Designer Project File (Xochi Media Inc.) |
| .ISC | GRDSOZ4W ISCII File |
| .ISC | Internet Servide Providers Configuration File |
| .ISC | RVS-COM Prepaid SMS Package File (Living Byte Software GmbH) |
| .ISD | dynaSight File |
| .ISD | GraphPad InStat |
| .ISD | RapidFile Dictionary |
| .ISD | InstallShield Dialog (Acresso Software Inc.) |
| .ISF | Tektronix Instrument Data File (Tektronix, Inc.) |
| .ISF | ZerOS Saved Show (Zero 88) |
| .ISF | ModelPress Highly-compressed CAD Model (Informative Graphics Corporation) |
| .ISF | Inspiration Concept Map (Flowchart) Document (Inspiration Software, Inc.) |
| .ISF | InfoNet Snapshot File (Wallingford Software Ltd.) |
| .ISFF | Intergraph Standard File Format (Intergraph Corporation) |
| .ISH | Compressed Archive File |
| .ISH | Image Speeder |
| .ISH | Image System |
| .ISK | Command File |
| .ISL | DB-MAIN Scheme File |
| .ISL | Inno Setup 1.3 File |
| .ISL | InstallShield Temporary Installer File (Acresso Software Inc.) |
| .ISL | The Universal Game Server Export File (The Universal Development Team) |
| .ISM | Image System |
| .ISM | MySQL ISAM Table Handler Data (MySQL AB) |
| .ISML | Intershop Enfinity |
| .ISO | LoseThos CD-ROM Image (Terry A. Davis) |
| .ISO | ISO-9660 CD Disc Image |
| .ISO | Easy CD Creator Disc Image (Sonic Solutions) |
| .ISO | CALS ISO 8613 Bitmap |
| .ISO | InstallShield Uninstall File (Acresso Software Inc.) |
| .ISO | RichWin |
| .ISO | Sega CD/Sony Playstation Game File (Sega of America, Inc.) |
| .ISO | Virtual PC Virtual CD-ROM Image (Microsoft Corporation) |
| .ISO | ISO-9660 Table |
| .ISO | Cimagraphi CAD File (Graphitech Ltd) |
| .ISOD | CloneDVD ISO Image (Elaborate Bytes AG) |
| .ISP | IIS Internet Service Provider Settings (Microsoft Corporation) |
| .ISP | Internet Communication Settings |
| .ISP | Internet/Internationnal Communication Settings parameter file |
| .ISP | Internet Sign-up File |
| .ISQ | MicroCT Image (SCANCO Medical AG) |
| .ISR | Uninstaller Text File |
| .ISR | Streets & Trips Route File (Microsoft Corporation) |
| .ISR | Go-Moku Game File |
| .ISS | Caseware IDEA IDEAScript |
| .ISS | Inno Setup Script (Jordan Russell's Software) |
| .ISS | ISS Graphic |
| .ISS | InstallShield Response File (Acresso Software Inc.) |
| .ISS | The Longest Journey Sound File (Funcom) |
| .IST | ImageStyler (Adobe Systems Incorporated) |
| .IST | Digitrakker Instrument File |
| .IST | Systems Management Server (SMS) Remote Instruction File (Microsoft Corporation) |
| .IST | TeX MakeIndex Style Index |
| .IST | Imagine Staging Stage Editor File (Impulse, Inc.) |
| .IST | IsoStar Library of Intermolecular Interactions (The Cambridge Crystallographic Data Centre) |
| .ISTG | Imagine Staging Stage Editor File (Impulse, Inc.) |
| .ISTR | IsoStar Library of Intermolecular Interactions (The Cambridge Crystallographic Data Centre) |
| .ISU | Netscape File |
| .ISU | InstallShield Uninstall Script (Acresso Software Inc.) |
| .ISU | Easy CD Creator 4 Uninstall File |
| .ISZ | UltraISO ISO Zipped Format (EZB Systems, Inc.) |
| .ISZ | WinMount Compressed ISO Image (WinMount International Inc.) |
| .IT | Read.it |
| .IT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IT | Intalk Settings |
| .IT | Impulse Tracker Music Module |
| .IT | Sound |
| .IT | VisIT Topographic Map Data (Kort & Matrikelstyrelsen) |
| .IT3 | Internet Timer 3 Log File |
| .ITA | Italian README File |
| .ITA | Personal Paint Italian Language User Interface File (Amiga) |
| .ITA | IconTweaker Theme |
| .ITA | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ITAL | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ITALIC | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ITC | Uthscsa Imagetool Calibration File |
| .ITC | iTunes Cover Flow Data File (Apple Inc.) |
| .itcl | tcl 00 Extension |
| .itcl | itcl Source Code |
| .ITD | SDL Trados Translation File (SDL) |
| .ITE | E-Tabs Reader File |
| .ITEMS | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .ITF | JPI TopSpeed Pascal Interface File |
| .ITF | Inside Tract File |
| .ITG | Intergraph Format (Intergraph Corporation) |
| .ITH | InTether Receiver File (Infraworks Corporation) |
| .ITHMB | iPod photo Thumbnail Image (Apple Inc.) |
| .ITI | Impulse Tracker Instrument |
| .ITL | IntelliTipster League File (IntelliForecast Labs) |
| .ITL | iTunes Music Database File (Apple Inc.) |
| .ITL | ITEM ToolKit Library (ITEM Software, Inc.) |
| .ITM | Diablo II Item (Blizzard Entertainment) |
| .ITM | Item / Article / Zone |
| .ITM | Infinity Game Engine Inventory Object (BioWare Corp.) |
| .ITP | riteMail Mail and Notes File (Pen&Internet, LLC) |
| .ITP | IconTweaker Plug-in |
| .ITP | BioWare Aurora Engine Palette (BioWare Corp.) |
| .ITP | ITEM ToolKit Project File (ITEM Software, Inc.) |
| .ITR | IntroCreator Project File (Klaus Schwenk) |
| .ITR | Icy Tower Replay (Johan Peitz, Free Lunch Design) |
| .ITS | International Translation |
| .ITS | Impulse Tracker Sample |
| .ITS | Internet Document Set |
| .ITU | Sheffield Dictionary File |
| .ITW | IT Works Database (Simple Solutions) |
| .ITW | Icetips Wizard Editor |
| .ITX | Impulse Imagine for Windows |
| .ITX | ITRANS Multilingual Transliteration Scheme |
| .ITX | Texture IMAGINE |
| .ITX | Igor Chromatogram File |
| .ITX | ISB Raw Song Format |
| .ITZ | Amiga and PC Tracker Module |
| .ITZ | Impulse Tracker Music Module |
| .IUM | infoUSA Network Meter File (infoUSA.com, Inc.) |
| .IUT | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IV | Open Inventor (Silicon Graphics, Inc.) |
| .IV | VRML File |
| .IV | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IV-VRML | Inventor VRML Format Document |
| .IV2I | Ghost Disk Drive Image (Symantec Corporation) |
| .IVB | Truevision Targa Format Bitmap |
| .IVC | iView MediaPro Catalog (iView Multimedia Ltd.) |
| .IVD | Beyond 20/20 Microdata Dimension or Variable-level File |
| .IVD | ISPS for Windows Multi-dimensional Data Store (International Planning & Research Corporation) |
| .IVE | OpenSceneGraph Native Binary Format (OSG Community) |
| .IVF | Indeo Video File (Intel Corporation) |
| .IVI | MSDN InfoViewer 5.0 Topic (Microsoft Corporation) |
| .IVN | iView MediaPro Catalog Notepad File (iView Multimedia Ltd.) |
| .IVNU | Inetba Web Page (Inetba) |
| .IVP | PhotoSuite Ver 4 Image-based Virtual Reality Text File (Sonic Solutions) |
| .IVP | Beyond 20/20 User Subset Profile |
| .IVP | Truevision Targa Bitmap |
| .IVQ | MSDN InfoViewer 5.0 index full-text searches |
| .IVR | RealPlayer Internet Video Recording (RealNetworks, Inc.) |
| .IVR | Virtual Reality World Live Picture |
| .IVS | ImageView Storage File (Infinite Solutions) |
| .IVS | TronMe Multimedia File (3D Solar UK Ltd.) |
| .IVS | ISPS for Windows Settings File (International Planning & Research Corporation) |
| .IVS | iVisit |
| .IVT | Concordance Inverted Full Text Database File |
| .IVT | Beyond 20/20 Table |
| .IVT | MSDN InfoViewer 5.0 Information Title |
| .IVU | IVUE Live Picture Drawing |
| .IVU | ImmerVision XML User Interface (ImmerVision) |
| .IVUE | Live Picture Multi-view Format |
| .IVWD | IntelliVIEW Designer Data/Layout File (Synaptris; products division of Cybernet Software Systems, Inc.) |
| .IVWL | IntelliVIEW Designer Report Layout File (Synaptris; products division of Cybernet Software Systems, Inc.) |
| .IVWR | IntelliVIEW Designer Report File (Synaptris; products division of Cybernet Software Systems, Inc.) |
| .IVWR | IntelliVIEW Offline Report File (Cybernet Software Systems Inc.) |
| .IVX | Beyond 20/20 Extract |
| .IW | IconAuthor - HSC InterActive Presentation Flowchart |
| .IW | IBM Updater File |
| .IW | Iconware Application |
| .IW | Idlewild Screensaver |
| .IW2 | Information Workshop 2000 Data File (BlackCat) |
| .IW3 | InfoWeb 3 Web Page (Tietotalo) |
| .IW4 | DjVu File |
| .IWA | IBM Writing Assistant Text |
| .IWC | Installwatch Database |
| .IWC | WaveL Wavelet Compressed Bitmap (WaveL Software) |
| .IWD | Call of Duty Map - Game Data Archive (Activision, Inc.) |
| .IWI | Call of Duty Skin (Activision, Inc.) |
| .IWI | Ignite Image Optimiser |
| .IWM | IconAuthor Start File (AimTech Corp) |
| .IWP | Wang Text File |
| .IWP | InfinityQS SPC Web Publishing Configuration (InfinityQS International) |
| .IWR | i*write 2.0 File |
| .IWR_BAK | i*write 2.0 Backup File |
| .IWS | Information Workshop Data File (BlackCat) |
| .IWS | InstallWatch Scan Results (Epsilon Squared) |
| .IWZ | ItemWizard File |
| .IX | WordPerfect Office Template File (Corel Corporation) |
| .IX | PaperPort Search File (ScanSoft Inc.) |
| .IX | Modula-3 Linker Information |
| .IX | FrameMaker Index File (Adobe Systems Incorporated) |
| .IX | WordPerfect Office Template File (Corel Corporation) |
| .IX1 | Rebel Chess Program Database File |
| .IX2 | WordPerfect Office Template File (Corel Corporation) |
| .IX2 | Rebel Chess Program Database File |
| .IX2 | WordPerfect Office Calendar File Calendar File (Corel Corporation) |
| .IX3 | Rebel Chess Program Database File |
| .IX3 | Instant.EXE 3.0 Script (ASXperts Inc.) |
| .IX4 | Rebel Chess Program Database File |
| .IXA | Ulead Image File (Corel Corporation) |
| .IXB | Ulead Video Image File (Corel Corporation) |
| .IXC | ArcView Geocoding Index For Read-Write Coverages (ESRI) |
| .IXC | Index+ for Windows Code Definition File (System Simulation Ltd.) |
| .IXD | Videoalive Indexer Extracted Closed Captions and Metadata (Videoalive.com) |
| .IXE | InterEX Control File |
| .IXF | Index+ for Windows Form Defintion File (System Simulation Ltd.) |
| .IXF | IFX for FAX FAX Document |
| .IXL | DB/TextWorks Database Indexed List (Inmagic, Inc.) |
| .IXP | ISIPublisher Publication Information Export (Image Solutions, Inc.) |
| .IXR | Index+ for Windows Report Definition File (System Simulation Ltd.) |
| .IXS | ArcView Geocoding Index For Read-Write Shapefiles (ESRI) |
| .IXT | ISIPublisher Publication Template (Image Solutions, Inc.) |
| .IXX | C++ Include File |
| .IYP | Instyler Project File (Instyler Software) |
| .IZD | Intrexx Application Export Format |
| .IZER | Unknown Apple II File (found on Golden Orchard Apple II CD Rom) |
| .IZS | 1st Page 2000 JavaScript Example File (Evrsoft) |
| .IZT | IZL Binary Token |
| .IZX | Intermezzon Designer E-Learning Published File (Intermezzon Learning Systems AB) |
| .I_I | Eru/erd File |