- .i
Intermediate file (Borland C++ 4.5)
- .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
- .icl
icon library
- .icn
Icon source code file
- .ico
Icon (Windows 3.x)
- .id
Disk identification file
- .ide
Project (Borland C++ 4.5)
- .idw
Vector graphics (IntelliDraw)
- .idx
Index (many FoxPro)
- .ifd
Form (JetForm Design)
- .iff
Interchange File Format bitmap graphics/sound (Amiga)
- .iff
Sun TAAC Image File Format (SDSC Image Tool)
- .ifp
Script (KnowledgeMan)
- .ifs
Fractal image compressed file (Yuvpak)
- .ifs
System file (OS/2) hpfs.ifs
- .ilb
Data (Scream Tracker)
- .ilk
Outline of program's format (MS ILink incremental linker)
- .im8
Sun raster graphics
- .ima
Mirage vector graphics (EGO, Chart, Autumn)
- .img
Bitmap graphics (Ventura Publisher GEM Paint)
- .imp
Spreadsheet (Lotus Improv)
- .imq
Image presentation (ImageQ)
- .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)
- .inf
Information text file (ASCII)
- .inf
Install script
- .ini
Initialization file
- .ink
Pantone reference fills file (CorelDRAW)
- .ins
Data (WordPerfect)
- .ins
Installation script (1st Reader)
- .ins
Instrument music file (Adlib)
- .int
Borland Interface Units
- .int
Program saved in Internal (semi-compiled) format (Signature)
- .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)
- .ipl
Pantone Spot reference palette file (CorelDRAW)
- .irs
Resource (WordPerfect)
- .isd
Spelling Checker dictionary (RapidFile)
- .ish
Compressed file archive created by ISH
- .iso
ISO-9660 table
- .it
Settings (intalk)
- .itf
Interface file (JPI TopSpeed Pascal)
- .iw
Presentation flowchart (IconAuthor HSC InterActive)
- .iwa
Text file (IBM Writing Assistant)
- .iwp
Text file (Wang)
- .izt
Izl binary token file (IZL)
- .jas
Graphics
- .jav
Java source code file
- .jbd
Datafile (SigmaScan)
- .jbx
Project file (Project Scheduler 4)
- .jet
Fax (Hybrid JetFax)
- .jff
Bitmap graphics (JPEG File Interchange Format)
- .jor
Journal file SQL
- .jou
Journal backup (VAX Edt editor)
- .jpc
Graphics (Japan PIC)
- .jpg
Bitmap graphics (Joint Photography Experts Group)
- .jtf
Fax (Hayes JT Fax)
- .jtf
Bitmap graphics (JPEG Tagged Interchange Format)
- .jw
Text document (JustWrite)
- .jwl
Library (JustWrite)
- .jzz
Spreatsheet (Jazz)
- .kar
Midi file with karaoke word track
- .kb
Keyboard script (Borland C++ 4.5)
- .kb
Program source (Knowledge Pro)
- .kbd
Keyboard mapping (LocoScript Signature Procomm Plus)
- .kbm
Keyboard mapping (Reflection 4.0)
- .kcl
Lisp source code (Kyoto Common Lisp)
- .kex
Macro (KEDIT)
- .key
Datafile (Forecast Pro)
- .key
Keyboard macros
- .key
Security file eg. Shareware Registration info
- .kpp
Toolpad (SmartPad)
- .kps
Ibm KIPS bitmap graphics
- .kyb
Keyboard mapping (FTP Software PC/TCP)
- .l
Lex source code file
- .l
Lisp source code file
- .l
Linker directive file (WATCOM wlink)
- .lab
Datafile (NCSS SOLO)
- .lab
Mailing labels (Q+E for MS Excel)
- .lay
Word chart layout (APPLAUSE)
- .lbg
Label generator data (dBASE IV)
- .lbl
Label (dBASE IV Clipper 5 dBFast)
- .lbm
Bitmap graphics (DeluxePaint)
- .lbm
Linear bitmap graphics (XLib)
- .lbo
Compiled label (dBASE IV)
- .lbr
Compressed file archive created by LU (lue220.arc)
- .lbr
Display driver (Lotus 1-2-3)
- .lbt
Label memo (FoxPro)
- .lbx
Label (FoxPro)
- .lcf
Linker Control File (Norton Guides compiler)
- .lck
Lockfile (Paradox)
- .lcl
Data (FTP Software PC/TCP)
- .lcn
Lection (WordPerfect)
- .lcs
Datafile (ACT! History Files)
- .lcw
Spreadsheet (Lucid 3-D)
- .ld
Long Distance codes file (Telix)
- .ld1
Overlay file (dBASE)
- .ldb
Data (MS Access)
- .ldf
Library definition file (Geoworks Glue)
- .les
Lesson (check *.cbt)
- .lev
Level file (NetHack 3.x)
- .lex
Lexicon (dictionary) (many)
- .lft
Laser printer font (ChiWriter)
- .lg
Logo procedure definitions (LSRHS Logo)
- .lgo
Logo for header and footer (SuperFax)
- .lgo
Startup logo code (Windows 3.x)
- .lha
Compressed file archive created by LHA/LHARC (lha255b.exe)
- .lhw
Compressed Amiga file archive created by LHWARP
- .lib
Library file (several programming languages)
- .lif
Logical Interchange Format data file (Hewlett-Packard)
- .lif
Compressed file archive
- .lim
Compressed file archive created by LIMIT (limit12.zip)
- .lin
Line types (AutoCAD)
- .lis
Listing (VAX)
- .lj
Text file for HP LJ II printer
- .ll3
Laplink III related file (document) (LapLink III)
- .lnk
Linker response file (.RTLink)
- .lod
Load file
- .log
Log file
- .lpc
Printer driver (TEKO)
- .lrf
Linker response file (MS C/C++)
- .lrs
Language Resource File (WordPerfect for Win)
- .lsl
Lotus Script Library
- .lsp
Lisp source code file (Xlisp)
- .lss
Spreadsheet (Legato)
- .lst
Keyboard macro (1st Reader)
- .lst
List file (archive index compiler listfile)
- .lst
Spool file (Oracle)
- .ltm
Form (Lotus Forms)
- .lwd
Text document (LotusWorks)
- .lwp
Lotus Wordpro 96/97 File
- .lwz
MS Linguistically Enhanced Sound File
- .lyr
DataCAD Layer File
- .lzd
Difference file for binaries (Ldiff 1.20)
- .lzh
Compressed file archive created by LHA/LHARC (lha255b.exe)
- .lzs
Compressed file archive created by LARC (larc333.zip)
- .lzw
Compressed Amiga file archive created by LHWARP
- .lzx
Compressed File
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