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Home > Quick Reference > File Extensions

Data Formats and Their File Extensions -- I

Number Symbol A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Full List
.i      Intermediate file (Borland C++ 4.5)
.iaf	MS Outlook 97 and 2000 e-mail account settings
.iax    Bitmap graphics (IBM Image Access eXecutive)
.ibm    Compressed file archive created by ARCHDOS (Internal IBM only)
.ica    Bitmap graphics (Image Object Content Architecture)
.icb    Bitmap graphics
.icc	Kodak Printer Image
        IronCAD Catalog
.icd	IronCAD 2D CAD file
.icl    icon library (ActivIcons, IconForge, ImageForge, ImageForge PRO)
.icm	Image Color Matching Profile file
	ICC Profile, Acer Monotor Drive
.icn    Icon source code file
.ico    Icon (Windows 3.x)
.id     Disk identification file
.idb	Database Used by Disassembler
	MS Developer Intermediate file
.ide    Project (Borland C++ 4.5)
.idf	ARTiSAN Real-time Studio ID file
	MIDI Instruments Drivers file
.idl	MS Visual C++ Interface Definition file
        OMG CORBA Interface Definition Language
.idw    Vector graphics (IntelliDraw)
.idx    Index (many - FoxPro)
.ies	Photometric file data 
.ifd    Form (JetForm Design)
.iff    Interchange File Format bitmap graphics/sound (Amiga)
	Maxis The Sims Object file
	Philips CDI File 
	Sun TAAC Image File Format (SDSC Image Tool)
.ifo    Saved graphic objects (ImageForge PRO)
.ifp    Script (KnowledgeMan)
.ifs    Fractal image compressed file (Yuvpak)
	System file (OS/2) hpfs.ifs
.igr	Intergraph SmartSketch Drawing
.igs	IGES-Format
.igx	iGrafx Process
.iif	QuickBooks for Windows Interchange file
.ilb    Data (Scream Tracker)
.ilk    Outline of program's format (MS ILink incremental linker)
.im30	Sun Raster image file
.im8    Sun raster graphics
.ima    Mirage vector graphics (EGO, Chart, Autumn)
.imb	IncrediMail file
.imc	IncrediMail file
.imf    ImageForge/IconForge saved filtered brushes(IconForge, ImageForge, ImageForge PRO)
.img    Bitmap graphics (Ventura Publisher - GEM Paint)
.imm	IncrediMail Trash
.imn	IncrediMail Notifier
.imp    Spreadsheet (Lotus Improv)
	Impaticized PowerPoint file
.imq    Image presentation (ImageQ)
.ims	Incredimail Graphic
.imv	Yahoo Instant Messenger IMVironment
	Impaticized Video format
.imw	Imageware Surfacer 3D CAD Surface Geometry
        IncrediMail Sound
.imz	Compressed floppy image
.in$    Installation file (HP NewWave)
.in3    Input device driver (Harvard Graphics 3.0)
.inb    Test script (Vermont HighTest)
.inc    Include file (several programming languages)
.ind    Index (dBASE IV)
.inf    Type 1 LaserJet font information file (soft font installers)
	Information text file (ASCII)
	Install script
.ini    Initialization file
.ink    Pantone reference fills file (CorelDRAW)
.inl	MS Visual C++ Inline Function file
.inp	GIS Software Text Input file  
	Oracle Source Code
	Self-Extracting Archive Utility Project
.ins    Data (WordPerfect)
	Installation script (1st Reader)
	Instrument music file (Adlib)
.int    Borland Interface Units
	Program saved in Internal (semi-compiled) format (Signature)
.inv	Rogue Spear Inventory file
.inx    Index (Foxbase)
.io     Compressed file archive created by CPIO
.iob    3d graphics database in TDDD format
.ioc    Organizational chart (Instant ORGcharting!)
.ion    4dos descript.ion file (file descriptions)
.ipd	InstallPROG 6 EDBS Install Database
.ipg	Mindjongg Format
.ipj	Impatica OnCue Project file
.ipl    Pantone Spot reference palette file (CorelDRAW)
.ipp	Help & Manual Proprietary Image
.ips	Game Patch file
	MENSI 3Dipsos
.ipx	IPIX AV file
.ipz	ICQ Skin Plus
.irs    Resource (WordPerfect)
.isd    Spelling Checker dictionary (RapidFile)
.ish    Compressed file archive created by ISH
.isk	Command file 
.iso	Easy CD Creator Disc Image
	File List for CD-ROM  
	InstallShield Uninstall file
	ISO Buster file
	ISO-9660 Table
	Vector Graphics (IsoDraw Illustration)
.isr	MS Streets & Trips Route file
.iss	InstallShield Response file
	ISS Graphic  
.ist	Digitrakker Instrument File (n-FaCToR)
.isu	InstallShield Uninstall Script
        Easy CD Creator 4 Uninstall file
        Netscape file
.it     Settings (intalk)
.itf    Interface file (JPI TopSpeed Pascal)
.ith	InTether technology secured file
.iv 	OpenInventor files (the successor to Inventor)
.iva 	security video data file
.ivt	MS Infoviewer Title
.iw     Presentation flowchart (IconAuthor - HSC InterActive)
.iwa    Text file (IBM Writing Assistant)
.iwp    Text file (Wang)
.izt    Izl binary token file (IZL)

Number Symbol A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Full List

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