J - JCL
-
- J - JPEG / JFIF Image
- J - JAR archive
- J - Java source code
- J - Image JPEG / JFIF
- J - JAR Compressed Archive ( with Security Envelope )
- J - JAR Compressed File
- J1 - EDIT Compiler JEDEC Boundary file
- J2A - Jazz Jackrabbit 2 Animation Library ( Epic MegaGames Inc.)
- J2B - Jazz Jackrabbit 2 Music File ( Epic MegaGames Inc.)
- J2C - Joint Photographic Experts Group 2000 Image File
- J2C - JPEG 2000 image
- J2D - Jazz Jackrabbit Data File ( Epic MegaGames Inc.)
- J2E - Jazz Jackrabbit 2 Episode File ( Epic MegaGames Inc.)
- J2H - Jazz Jackrabbit 2 High Scores ( Epic MegaGames Inc.)
- J2I - Jazz 2 Internet Link File
- J2I - Jazz Jackrabbit 2 Internet Server Link ( Epic MegaGames Inc.)
- J2K - JPEG 2000 Image
- J2K - JPEG - 2000 JP2 File
- J2L - Jaxx Creation Station Level File ( Epic MegaGames Inc.)
- J2L - Jazz Jackrabbit 2 Level File
- J2M - Jazz Jackrabbit 2 Recorded Macro ( Epic MegaGames Inc.)
- J2S - Jazz Jackrabbit 2 Language Data ( Epic MegaGames Inc.)
- J2T - Jazz Jackrabbit 2 Tile Set ( Epic MegaGames Inc.)
- J2V - Jazz Jackrabbit 2 Cinematic File ( Epic MegaGames Inc.)
- J3D - Atari Jaguar 3D object data file
- J62 - Ricoh camera format file
- J6I - Ricoh Digital Camera image format
- J6I - Ricoh Digital Camera File ( Ricoh Co. Ltd.)
- JA - Trainz Railroad Simulator Game Content ( Auran Games )
- JA - IBM tools updater file
- JACKSUM - Jacksum Fingerprint ( Dipl.-Inf. (FH) Johann N. L? fflmann )
- JAD - Java Application Descriptor file
- JAG - Atari Jaguar JPEG compressed image
- JAK - Jack compressed archive file
- JAM - Joaquim - Andrew - Mats Message Base Proposal
- JAM - JAM Musical Score
- JAM - Unknown Apple II File
- JAM - Leisure Suite Larry : Magna Cum Laude archive file
- JAM - Misc
- JAM - E- mail file
- JAM - E- mail
- JAM - JamTracker Music Module
- JAM - Image Microprose
- JAM - Jam music score - Jam
- JAM - Jam messagebase - FTN software
- JAM - FTN Software Jam Messagebase
- JAM - JamTracker module : Music
- JAMMIX - Jammix Enhacer Music Transform File ( Danilics Tibor )
- JAP - Fifa World Cup Game Data fe Art Legalscr File
- JAP - jalbum Project Header
- JAP - JAlbum album file
- JAR - Java Archive (a compressed file containing a package of Java applicatio...
- JAS - Graphic (Generic)
- JAV - Java Source File
- JAV - Java language source code file
- JAV - Internet Program : JAVA MS Visual J++ Source Code
- JAVA - Source code (Java)
- JAW - IchiTaro Web Japanese Extended WordProcessor ( Justsystem Corporation )
- JBA - Jabaco Source Code Programming Language ( Jabaco )
- JBB - JobEditor32 Binary Job Data ( Motoman Inc.)
- JBC - BestCrypt Container ( Jetico Inc.)
- JBC - Jam byte - code hex file
- JBC - BestCrypt file
- JBD - Datafile (SigmaScan)
- JBF - Image browser file (Paint Shop Pro)
- JBG - JBIG File
- JBG - Image JBIG 1-bit raster
- JBI - Motoman Robot Job File
- JBI - JobEditor32 ASCII Job Data ( Motoman Inc.)
- JBIG - 1-bit raster image graphics : Joint Bi- level Image
- JBIG - Joint Bilevel Image Group
- JBIG - JBIG raster image graphics
- JBK - Jot + Notes Backup File
- JBK - Juno Backup File
- JBL - Doom scene add-on file
- JBL - Add-on : DOOM scene
- JBP - DJ Jukebox Project
- JBR - Paint Shop Pro Brushes file
- JBR - Paint Shop Pro Brush ( Corel Corporation )
- JBS - Binary file with data and calcs and graphs.
- JBX - Project file (Project Scheduler 4.0)
- JC - FlashGet Intermediate Download ( Beijing Zhitongwuxian Tech Ltd.)
- JC - Watcom src file
- JC - Watcom Source File
- JC! - FlashGet incomplete download file
- JC! - FlashGet File
- JCAMP - Misc
- JCB - CB- JCBrooke Song / Module
- JCB - CB- JCBrooke module / song
- JCC - Code Crusader Project Data (New Planet Software )
- JCC - Japan Crossword File ( Dmitry Torshin format ) Header
- JCC - Japan Crossword Dmitry Torshin Format File ( EliteWare )
- JCD - FlashGet File
- JCD - FlashGet Download Database File ( Beijing Zhitongwuxian Tech Ltd.)
- JCE - JWPce ( Glenn Rosenthal )
- JCF - JAWS for Windows Configuration File ( Freedom Scientific )
- JCF - JAWS config file
- JCK - Liquid Motion JACK Scene Description
- JCL - Job Control Language IBM
- JCL - IBM Job Control Language file format

