Стандартные занчения расширений файлов
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 Num Sym
.??_ Files ending in "_" are often compressed install files of the same
name (e.g., .EX_ expands to .EXE, .DL_ expands to .DLL, etc.)
.I Progress Include File
Borland C++ Intermediate File
INTERCAL File (INTERCAL=Compiler Language With No Pronounceable Acronym)
.I17 Pixel Power Collage [XnView]
.I18 Pixel Power Collage [XnView]
.I2S Invision for mIRC Settings
.I66 Interactive66 Graphic Design Information
.IAF Microsoft Outlook 97 and 2000 E-mail Account Settings
Microsoft Outlook Express Account Settings
.IAM Autodesk Inventor CAD File
.IAN Sterling Software COOL Business Team Model File
Sterling merged with Computer Associates.
.IAP TeamBG File (modify Infinity Engine games)
.IAX IBM Image Access Executive Bitmap
.IB7 Pixel Power Collage [XnView]
.IBA MDE InfoHandler Infobase File
IBasic Source Code File
.IBD Windows Installer File
.IBF Instant Backup
.IBG Bert's Dinosaurs File
.IBK National Construction Estimator 32 Picture File
.IBL IBasic Component Language File
.IBM Electronic Arts Deluxe Paint [XnView]
Archdos Compressed File (IBM internal file)
.IBS i2 iBase File
.IBX Interscope BlackBox File (encryption program)
.IC1 ZyIMAGE Index
.ICA Citrix Independent Computing Architecture File
Image Object Content Architecture (IOCA) Graphics File [XnView]
.ICB Targa Bitmap
Image Capture Board [XnView]
.ICC Kodak Printer Image
IronCAD Catalog
ICC Profile Format File (device color correction info) [Viewer and Profiles]
.ICD IronCAD 2D CAD File
ASTi Model Builder File
Rate Structure File (BLDRATE.EXE input)
File Associated with Many Games
.ICE Archive File
.ICF ICOM CS-2100 Radio Programming Data
Insane Chat Saved Conversation [ASCII file] (Use care entering this site)
INI Creator for X10 Remote Control
.ICL Icon Library File (various) ImageForge/IconForge Microangelo
[XnView] [IrfanView]
Clean File (functional programming language)
.ICM Image Color Matching Profile File
ICC Profile, Acer Monitor Drive
.ICN Icon Program
AT&T Graphic Format
RIPTerm Image [XnView]
Bert's Dinosaurs File
.ICO Icon ImageForge/IconForge Microangelo [IrfanView]
GIMP Icon [GIMP] [XnView]
Sun Icon/Cursor [XnView]
.ICON Sun Icon/Cursor [XnView]
.ICP InterCept File (retail space management)
.ICQ ICQ Saved File
.ICS Outlook Calendar File 
[Buy Office XP at Shop.Microsoft]
SwiftView Command File
IronCAD 3D CAD File
Inovate 3D CAD File
.ICW InterCAD File (Polish site)
.ID Disk Identification File
Lotus Notes ID File
AOL Instant Messenger Buddy Icon File (renamed GIF, BMP, JPG, etc.)
.IDA Microsoft Server File (default.ida is attacked by the Code Red Worm)
.IDAPI Borland Integrated Database Application Programming Interface
.IDB Microsoft Developer Intermediate File
Database Used by Disassembler
.IDC Core IDC [XnView]
.IDD MIDI Instrument Definition
.IDE Integrated Development Environment Configuration File
Sophos Anti-Virus Virus IDEntity File
Borland C++ Project
Grand Theft Auto 3 Model IDs and Properties [DEFAULT.IDE]
.IDF MIDI Instruments Definition File
ARTiSAN Real-time Studio ID File (UML CASE Tool) [See .PKF]
.IDI i-deas Web ACCESS File
.IDIF Netscape Saved Address Book
.IDL Microsoft Visual C++ Interface Definition File
OMG CORBA Interface Definition Language
CRiSP Harvest File
.IDQ Internet Data Query File
.IDS Infinity Game Engine Numbers to Description Map [More Info]
.IDT Output of DLL2IDT Utility (used in disassembly)
Text Archive Table (used in software development)
Windows Installer File
.IDU Interleaf Desktop Utility (A document transfer format.)
.IDV Autodesk Inventor Design View Tree
.IDW Aldus IntelliDraw Vector Graphic
Autodesk Inventor CAD File
.IDX Index (multiple programs)
ArcView Geocoding Index For Read-Only Datasets
.IDY Debug Information File (IMS Database related)
.IDZ i-deas Web ACCESS File
.IEF Image File
.IES Photometric File Data [Illuminating Engineering Society]
.IF9 Pixel Power Collage [XnView]
.IFD Jet Form Design Form
.IFF Graphic, Sound (Interchangeable File Format) [XnView] [IrfanView]
The Sims (Maxis) Object/Data File
Sun TAAC Image File [XnView]
.IFL Descent 3 Ship Graphic
.IFM Brighterion iPrevent Fraud Model
Shana Informed Filler (electronically fillable forms)
.IFO DVD Info File (contains menus and other information)
.IFP KnowledgeMan Script
.IFS OS/2 Warp Installable File System
IconForge Image EXE Library
Yuvpak Compressed Fractal Image
Fractint Iterated Function System Parameters (Fractal image generator.)
.IFW Luminosity Impact! File
.IFX ImageSoft v2.00 Graphic
.IGC Global Positioning System Datalogger
.IGES IGES-Format [IGES Info]
.IGF Inset Systems Metafile
.IGL inSORS IGLayout Layout File
.IGM inSORS IGClient Meeting File
.IGNORE Likely a text file (e.g., README.IGNORE)
.IGP Igor Reader Sheet Music File
.IGR Intergraph SmartSketch Drawing
.IGS IGES-Format [IGES Info]
.IGV inSORS IGClient Venue File
.IGX iGrafx Process (graphical process modeling and simulation)
.II C64 Doodle Compressed File [XnView]
.IIF QuickBooks for Windows Interchange File
.III Intel IPhone Compatible
.IIM Interscope InstallMaster Setup Project
Inshape Graphic [XnView]
iOpus Internet Macro
.IIMG Interleaf Graphic [XnView]
.IJS J Interpretor Script File (J Language -
Mathematical programming language with APL roots)
.IKL Microsoft InkBall (accessory for Windows XP
Tablet PC Edition - due end 2002)
.IL Icon Library
MSIL Assembler Input File
.ILB Scream Tracker Data
.ILBM Graphic, Sound (Interchangeable File Format) [may be .IFF file, see above]
.ILK Microsoft ILink Program Format Outline
.ILL Adobe Illustrator Prologue
.ILM Satsang Quiz File
CAS 200 QDA v3.0 Image List Mode File (DNA mapping)
Illuminatus Opus Multimedia File
Iomega Zip Drive Speed Configuration File [Good Info Source]
.ILPLOPTIONS InterLock and PowerLock (public computer management utility)
.ILPLVOUCHERS InterLock and PowerLock (public computer management utility)
.ILS Microsoft Internet Security And Acceleration Server Summary
.ILV ILOG View File
.ILVG iLiving P-to-P (iliving file viewer)
.IM5 Visilog [XnView]
.IM8 Sun Raster Graphic
.IMA WinImage File (Floppy and disk imager)
Mirage Vector Graphics
PIXELA ImageMixer File (Digital image organizer) [Link is Japanese]
.IMB IncrediMail File
.IMC IncrediMail File
.IMD Caseware IDEA (Data Analysis Tool)
.IMF ImageForge/ImageForge Image EXE Library
IncrediMail Letter
.IMG Bitmap Graphic (several programs) [XnView] [IrfanView]
AutoCAD CAD-Camera [XnView]
ERDAS IMAGINE Format
Planetary Data System [XnView]
Idrisi32 Raster Image
Radiance Scene Description Image [XnView]
CloneCd CD Image File [IsoBuster Data Recovery Tool]
Floppy Image File
Apple Macintosh Disk Copy Format
Microtek Eyestar [XnView]
Sharp GPB [XnView]
Starbase [XnView]
Vicar [XnView]
Vivid Ray-tracer [XnView]
Grand Theft Auto 3 .DFF and .TXD Archive
.IMH IncrediMail Data File
.IMI IncrediMail Animation
.IMJ JFIF File With a Microsoft Windows BMP Header (Pegasus Image Corporation)
.IMK IncrediMail License
.IMM IncrediMail Trash
.IMN IncrediMail Notifier
.IMP Urban Chaos Game File
Lotus Improv Spreadsheet
Babya Installer Archive
DVD File
FileMaker Database Translation Filter
WinIMP Archive
.IMQ ImageQ Presentation
.IMR Cognos Impromptu Report Writer
.IMS Incredimail Graphic
.IMT IMNET Image [XnView]
.IMV Yahoo Instant Messenger IMVironment
.IMW Imageware Surfacer 3D CAD Surface Geometry
IncrediMail Sound
.IMY iMelody Ringtone Format (link is PDF file)
.IMZ Compressed Floppy Image
WinImage File (Floppy and disk imager)
.IN$ HP NewWave Install File
.IN3 Harvard Input Device Driver (Harvard Graphics taken over by Serif)
.IN7 Ox Object-Oriented Matrix Programming Language PcGive 7 Data File
.INB Vermont HighText Script
Visual Expert Source Code Documentation
.INC Include File (various)
Internet Connection File (used by ISPs)
.INCD Adobe InCopy/InDesign Link File (Link stories from an InDesign document)
.IND dBase IV or DataPerfect Index
Well of Souls Game File
.INDD Adobe Indesign Document
.INF Information or Setup File (many)
.INFO Amiga Information File [XnView]
.ING MasterCook Ingredients
.INI Initialization/Configuration File (many)
.INK Pantone Reference File
Mimio Ink File [Electronic Whiteboard]
.INL Microsoft Visual C++ Inline Function File
.INO Inor IPRO Software File (IPAQ transmitter configuration software)
.INP Oracle Source Code
Self-Extracting Archive Utility Project
GIS Software Text Input File [GIS info]
(ArcView, et.al.) (JShape/FShape)
CHARMM Input File (molecular analysis)
FRANC2D Mesh File
InPage (Noorinastaliq font/nastaliq script editor)
.INS Internet Communication Setting
AdLib Instrument Music File
WordPerfect File
Ensoniq EPS Family Instrument
Sample Cell / II Instrument
InstallShield Script
X-Internet Sign-up File
Inspiration Mind Mapping Software File
1st Reader Install Script
.INSTALL Likely a text file (e.g., README.INSTALL)
.INT Borland Interface Units
Foxpro Code Page
Signature Semi-compiled Program
Unreal Tournament Mutator
Intermediate Code used for syntax checking (various)
.INTER Interspector Project File
.INTERLOCKFAVOURITES InterLock and PowerLock (public computer management utility)
.INTERNETMAILSEND Internet Mail Send Powertoy File
.INTO Interspector Object File
.INU INSPEC Configuration File
.INV Rogue Spear Inventory File
.INV_LOWRES Rogue Spear Inventory File
.INX Foxbase Index
ACL For Windows Index (data mining software)
InstallShield Compiled Rules File (Also see .RUL)
.IO Compressed Archive
.IOB Imagine File
TDDD Format 3D Graphic Database
iOnly iOnly ME Website Generator Backup (German site)
.IOC Instant ORGcharting! Organization Chart
.IOCA Image Object Content Architecture (IOCA) Graphics File [XnView]
.IOF Findit Document
.ION Text Program/Installation Description
4DOS File Description
.IOP iOnly iOnly ME Website Generator File (German site)
.IP IconPackager File (changes the look of Windows icons)
.IPD InstallPROG 6 EDBS Install Database
.IPE ItsPersonal File (Personal diary)
.IPF Microsoft SMS Installer Script (with System Management Server 2.0)
Grand Theft Auto 3 Animation Data [PED.IPF]
.IPG Mindjongg Format [XnView]
.IPH InterPaint Hires Image [XnView]
.IPJ Autodesk Inventor Project File [ASCII file specifying project file locations]
.IPK NRG iPack File
Sharp Zaurus PDA Application Install File
.IPL Corel Pantone Spot Reference Palette
InstallPROG 6 EDBS File Library
Grand Theft Auto 3 Object Placement Data [GTA3 Map Editor]
.IPLI IPLab Graphic (I find this as a Macintosh type, but it could be a PC extension)
.IPN Autodesk Inventor Presentation File
.IPP Help & Manual Proprietary Image
.IPR IntelliJ Project XML File
.IPS Game Patch File (allows running of illegal copies of some games)
MENSI 3Dipsos (3D pointcloud analysis)
IPScript File [Play with Quicktime with Internet Pictures Corp.
iPIX Plugin v6.2 (CrossOver - npipx32.dll) or Netscape Plugin iPIX Viewer]
.IPT Autodesk Inventor CAD File
InterPaint Multicolor Image [XnView]
.IPW UniPlot Graph [Free viewer]
.IPX Interactive Pictures Corporation AV File
[Play with Quicktime with Internet Pictures Corp.
iPIX Plugin v6.2 (CrossOver - npipx32.dll) or Netscape Plugin iPIX Viewer]
Viewpoint iPix File
.IPZ ICQ Skin
.IQA AmeriCalc Application (Mutual Fund Tax Program)
.IQB AmeriCalc Backup File (Mutual Fund Tax Program)
.IQC AmeriCalc Client File (Mutual Fund Tax Program)
.IQD AmeriCalc Database File (Mutual Fund Tax Program)
.IQF Integra 3.0 Query File
.IQS AmeriCalc Security File (Mutual Fund Tax Program)
.IQU AmeriCalc Update File (Mutual Fund Tax Program)
.IQY Excel Web Query [Buy Office XP at Shop.Microsoft]
.IRD Microsoft Money Temporary File
.IRIS Silicon Graphics RGB [XnView]
.IRS WordPerfect Resource File
.IRX PS2 Modified Elf Object File
Brewer Lamp Irradiation File
IBM Mainframe Rule File
.ISBN HM3 Tutorial Software (unverified)
.ISC RVS-COM (Prepaid SMS package file.)
.ISD RapidFile Dictionary
GraphPad InStat
InstallShield Dialog
dynaSight File
.ISF Informative Graphics Corporation ModelPress Highly-compressed CAD Model
[Description/Viewer]
.ISH Compressed Archive File
Image Speeder [XnView]
Image System (HiRes) [XnView]
.ISK Command File (similar to a batch file - view in text editor)
.ISL InstallShield Temporary Installer File
DB-MAIN Scheme File (Data-oriented CASE environment)
.ISM Image System (Multicolor) [XnView]
.ISML Intershop Enfinity (Intershop Markup Language - ASCII file)
.ISO File List for CD-ROM [Fantom CD Emulator]
ISO Buster File
InstallShield Uninstall File
ISO-9660 Table
Easy CD Creator Disc Image
RichWin (Chinese Text Display - Link is to Chinese site)
SEGA CD/Sony Playstation Game File [Use GENS or ePSXe Emulator]
.ISP Internet Sign-up File
Internet Communication Settings
.ISR Microsoft Streets & Trips Route File
Uninstaller Text File (_deisreg.isr)
.ISS InstallShield Response File
ISS Graphic [XnView]
Caseware IDEA IDEAScript (Data Analysis Tool)
Inno Setup Script
.IST Digitrakker Instrument File (by n-FaCToR)
.ISU InstallShield Uninstall Script
Easy CD Creator 4 Uninstall File
Netscape File
.IT Impulse Tracker Music Module
Intalk Settings
.ITE E-Tabs Reader File
.ITF Inside Tract File
JPI TopSpeed Pascal Interface File
.ITG Intergraph Format [XnView]
.ITH InTether Receiver File (security software)
.ITI Impulse Tracker Instrument
.ITM Infinity Game Engine Inventory Object [More Info]
.ITS Internet Document Set
Impulse Tracker Sample
.ITW Icetips Wizard Editor (partially encrypted ini file)
.ITX ISB Raw Song Format (ASCII file with text/lyrics and TeX/ITRANS commands )
ITRANS Multilingual Transliteration Scheme
Impulse Imagine for Windows
Igor Chromatogram File
.ITZ Impulse Tracker Music Module [use Winamp]
Amiga and PC Tracker Module [Use ModPlug or DeliPlayer]
.IV VRML File
Open Inventor File
.IVC iView MediaPro
.IVF Indeo Video File
.IVP Truevision Targa Bitmap [XnView]
.IVR PhotoSuite 4 Image-based Virtual Reality Text File
.IVS iVisit (video chat)
.IVT Beyond 20/20 Table (Multidimensional data viewer)
Concordance Inverted Full Text Database File
.IVX Beyond 20/20 Extract (Multidimensional data viewer)
.IW Iconware Application
Idlewild Screensaver
.IW4 DjVu File [XnView]
.IWA IBM Writing Assistant Text
.IWI Ignite Image Optimiser
.IWC Installwatch Database (install monitor)
.IWP Wang Text File
.IWR i*write 2.0 File
.IWR_BAK i*write 2.0 Backup File
.IWZ ItemWizard File (content management software)
.IX Framemaker Index File
Paperport Search File
.IX WordPerfect Office Calendar File (CALENDAR.IX)
WordPerfect Office Calendar Alarm File (CCALARM.IX)
.IX1 Rebel Chess Program Database File
.IX2 Rebel Chess Program Database File
WordPerfect Office Calendar File (CALENDAR.IX2)
WordPerfect Office Calendar Alarm File (CCALARM.IX2)
.IX3 Rebel Chess Program Database File
.IX4 Rebel Chess Program Database File
.IXA Ulead Image File (video CD image)
.IXC ArcView Geocoding Index For Read-Write Coverages
.IXL DB/TextWorks Database Indexed List
.IXS ArcView Geocoding Index For Read-Write Shapefiles
.IZD Intrexx Application Export Format (binary)
.IZT Izl Binary Token