Extensions	Programm, Beschreibung
J62	Ricoh camera format
JAR	Java ARchive file (a compressed file for applets and related files)
JAVA	Java source code
JBF	Paint Shop Pro image browser file
JFF	JPEG file
JFIF	JPEG file
JIF	JPEG file
JMP	SAS JMPDiscovery chart-to-statistics file
JN1	Epic MegaGames Jill of the Jungle data file
JPE	JPEG file
JPEG	JPEG compressed bitmap
JPG	JPEG bitmap
JS	JavaScript source code
JSP	A HTML page containing a reference to a Java servlet
JTF	JPEG bitmap
K25	Kurzweil 2500 sample
KAR	Karaoke MIDI file (text+MIDI)
KDC	Kodak Photo-Enhancer
KEY	DataCAD Icon toolbar file
KFX	KoFax Group 4 image
KIZ	Kodak digital postcard files
KKW	Contains all K-keywords in the RoboHELP Help project Index Designer not associated with topics
KMP	Korg Trinity KeyMaP file
KQP	Konica camera native files
KR1	Kurzweil 2000 sample (multi-floppy)
KRZ	Kurzweil 2000 sample
KSF	Korg Trinity Sample File
KYE	Kye game data
LBM	Deluxe Paint bitmap
LBT	Microsoft FoxPro labels
LBX	Microsoft FoxPro labels
LDB	Microsoft Access lock file
LDL	Corel Paradox Delivered library
LEG	Legacy document
LES	Logitech Entertainment system game profiles (same as REG file)
LFT	3D Studio (DOS) loft file
LHA	Alternate file suffix for LZH
LIB	Library
LIN	DataCAD Line type file
LIS	Output file produced by a Structured Query Reporting (SQR) program
LLX	Laplink Exchange Agent
LNK	Windows shortcut file
LOG	Log file
LPD	Helix Nuts and Bolts file
LRC	Intel Video Phone file
LSL	Corel Paradox Saved library
LSP	AutoLISP, CommonLISP, and othe LISP language files
LST	List file
LU	ThoughtWing Library Unit file
LVL	Parallax Software's Miner Descent/D2 Level Extension
LWLO	Lightwave Layered Object file
LWOB	Lightwave Object file
LWP	Lotus Wordpro 96/97 file
LWSC	Lightwave Scene file
LYR	DataCAD Layer file
LZH	LH ARC compressed archive
LZS	Skyroads data file
M1V	MPEG-related file (MIME type 'mpeg')
M3D	Corel Motion 3D animation
M3U	MPEG URL (MIME audio file)
MAC	MacPaint image
MAD	Microsoft Access module
MAF	Microsoft Access Form
MAG	A graphics file format found in some Japanese files
MAGIC	Magic Mail Monitor configuration file
MAK	Visual Basic or MS Visual C++ Project
MAM	Microsoft Access Macro
MAN	Unix Manual page output
MAP	Map file
MAP	Duke Nukem 3D WAD game file
MAQ	Microsoft Access Query
MAR	Microsoft Access Report
MAS	Lotus Freelance Graphics Smartmaster file
MAT	Matlab variables binary file
MAT	Microsoft Access Table
MAUD	MAUD sample format
MAX	A file format which repesents a scene in KINETIX's 3D Studio MAX
MAX	Paperport file
MAX	OrCAD layout file
MAZ	Hover maze data
MAZ	A file format use by Division's dVS/dVISE
MB1	Apogee Monster Bash data file
MBOX	Berkeley Unix mailbox format
MBX	Extension Microsoft Outlook adds to saved email, Eudora mailboxes
MCC	Dialer10 calling card
MCC	Dialer10 calling card
MCR	DataCAD Keyboard macro file
MCW	Microsoft Word for Macintosh document
MDA	Microsoft Access add-in
MDA	Microsoft Access workgroup for version 2
MDB	Microsoft Access database
MDE	Microsoft Access MDE file
MDL	Digital Tracker music module (MOD) file
MDL	Quake model file
MDN	Microsoft Access blank database template
MDW	Microsoft Access Workgroup
MDZ	Microsoft Access wizard template
MED	Music Editor, OctaMED music module (MOD) file
MER	Format for interchanging spreadsheet/database data; recognized by Filemaker, Excel, and others
MET	Presentation Manager metafile
MGF	A file in a Materials and Geometry Format
MHTM	MHTML document (MIME)
MHTML	MHTML document (MIME)
MI	Miscellaneous
MIC	Microsoft Image Composer file
MID	MIDI music
MIF	Adobe FrameMaker Interchange Format
MIFF	Machine Independent Format File
MIM	A multipart file in the Multi-Purpose Internet Mail Extensions (MIME) format; often created as the result of sending
MIME	See MIM.
MLI	A file in 3D Studio's Material-Library format
MME	A multipart file in the Multi-Purpose Internet Mail Extensions (MIME) format; often created as the result of sending e-mail with attachments in AOL. The files in a multipart MME file can be "opened" (unarchived and separated into individual files) using Winzip or a similar program.
MMF	Meal Master Format, a recipe catologing format
MMF	Microsoft Mail File
MMM	Microsoft Multimedia Movie
MMP	Mindmapor MindManager file
MN2	Descent2 Mission File
MND, MNI	Mandelbrot for Windows
MNG	Multi-image Network Graphics
MNT	Microsoft FoxPro menus
MNX	Microsoft FoxPro menus
MOD	FastTracker, StarTrekker, Noise Tracker (etc.) music module file
MOD	Microsoft Multiplan spreadsheet
MOD	Amiga/PC tracker module
MOV	QuickTime for Windows movie
MP2	MPEG Audio Layer 2
MP2	MPEG Audio Layer 2 file (MIME video file)
MP3	MPEG Audio Layer 3 (AC3)
MP3	MPEG Audio Layer 3 (AC3) file
MPA	MPEG-related file (MIME type 'mpeg')
MPE	MPEG animation
MPEG	MPEG animation
MPG	MPEG animation
MPP	Microsoft Project file
MPP	CAD drawing file format
MPR	Microsoft FoxPro menus (compiled)
MRI	MRI Scan
MSA	Magic Shadow Archive
MSDL	Manchesters Scene Description Language
MSG	Microsoft Mail message
MSN	Microsoft Network document
MSN	Descent Mission File
MSP	Microsoft Paint bitmap
MTM	MultiTracker music module (MOD) file
MUL	Online game called Ultima online
MUS	Music
MUS10	Mus10 audio
MVB	Microsoft Multimedia Viewer file
MWP	Lotus Wordpro 97 Smartmaster file
NAN	Nanoscope files (Raw Grayscale)
NAP	NAP Metafile
NCB	Microsoft Developer Studio file
NCD	Norton Change Directory
NCF	Netware Command File
NCF	Lotus Notes internal clipboard
NDO	3D low-polygon modeler, Nendo
netCDF	network Common Data Form
NFF	Neutral File Format
NIL	Norton Icon Library file (EasyIcons-compatible)
NIST	NIST Sphere audio
NLB	Oracle 7 data
NLM	Netware Loadable Module
NLU	Norton Live Update E-Mail Trigger file
NS2	Lotus Notes database (version 2)
NSF	Lotus Notes database
NST	Noise Tracker music module (MOD) file
NTF	Lotus Notes database template
NWC	Noteworthy Composer song file
NWS	Microsoft OutlookExpress news message (MIME RFC822)
O01	Typhoon voice file
OBD	Microsoft Office binder template
OBD	Microsoft Office Binder
OBJ	Object file
OBZ	Microsoft Office Binder Wizard
OCX	Microsoft Object Linking and Embedding custom control
ODS	Microsoft Outlook Express mailbox file (?)
OFF	3D mesh Object File Format
OFN	Microsoft Office FileNew file
OFT	Microsoft Outlook template
OKT	Oktalyzer music module (MOD) file
OLB	OLE Object Library
OLE	OLE object
OOGL	Object Oriented Graphics Library
OPL	Organiser Programming Language source file - Psion/Symbian
OPO	OPL output executable file
OPT	Microsoft Developer Studio file
OPX	OPL extension DLL
OR2	Lotus Organiser 2 file
OR3	Lotus Organiser 97 file
ORA	Oracle 7 configuration
ORC	Oracle 7 script
ORG	Lotus Organiser file
OSS	Microsoft Office Search file
OST	Microsoft Exchange/Outlook Offline file
OTL	Super NoteTab template file (Fookes)
P10	Tektronix Plot 10 drawing
P65	Pagemaker 6.5 file
P7C	Digital ID file (MIME)
PAB	Microsoft Personal Address Book
PAC	SB Studio II package
PAK	Quake WAD file
PAL	A compressed file
PAS	Pascal source code (Borland)
PAT	DataCAD Hatch pattern file
PAT	Corel Draw pattern
PAT	Advanced Gravis Ultrasound/Forte tech. Patch
PBD	PowerBuilder Dynamic library, an alternative to a native DLL
PBF	Turtle Beach Pinnacle Bank File
PBK	Microsoft Phonebook
PBL	PowerBuilder Library used in the PowerBuilder development
PBM	Portable bitmap
PBR	PowerBuilder Resource
PCD	Kodak Photo-CD image
PCD	P-Code compiled test scripts as in Microsoft Tst and Microsoft
PCE	Maps Eudora mailbox names to DOS filenames
PCL	Hewlett-Packard Printer Control Language file (printer-ready
PCM	Audio file format
PCM	OKI MSM6376 synth chip PCM format
PCP	Symantec Live Update Pro file
PCS	PICS animation
PCT	Macintosh PICT drawing
PCX	ZSoft PC Paintbrush bitmap
PDB	3Com Palmpilot database file
PDF	Adobe Acrobat Portable Document Format or Netware Printer
PDF	Package Definition File from Microsoft Systems Management
PDQ	Patton&Patton Flowcharting PDQ Lite file
PF	Aladdin Systems Private Files encrypted file
PFA	Type 1 font (ASCII)
PFB	Type 1 font (binary)
PFC	PF Component
PFM	Printer Font Metrics
PGL	HP Plotter drawing
PGM	Portable Graymap (bitmap)
PGP	PGP encrypted file
PH	Temporary file generated by Microsoft Help Compiler
PHTML	Perl-parsed HTML
PIC	PC Paint bitmap
PIC	Lotus picture
PIC	Macintosh PICT drawing
PICT	Mac PICT image file
PIF	Program Information File
PIF	IBM PIF drawing
PIG	Lucas Arts Dark Forces WAD file
PIN	Epic Pinball data file
PIN	Epic Pinball data file
PIX	Inset Systems bitmap
PJ	MKS Source Integrity file
PJT	Microsoft's Visual Foxpro Project
PJX	Microsoft's Visual Foxpro Project
PKG	Microsoft Developer Studio application extension (similar to a
PKR	PGP Public Keyring
PL	Perl program
PLG	A file format use by REND386/AVRIL
PLI	Oracle 7 data description
PLM	DisorderTracker2 module
PLS	DisorderTracker2 sample
PLS	MPEG PLayList file (used by WinAmp)
PLT	HPGL Plotter drawing
PLT	AutoCAD Plot drawing
PLT	Gerber sign-making software
PM5	Pagemaker 5.0 file
PM6	Pagemaker 6.0 file
PNG	Portable Network Graphics bitmap
PNG	Paint Shop Pro Browser catalogue
PNT	MacPaint graphic file
PNTG	Same as PNT file
POG	Descent2 PIG file extension
POT	Microsoft PowerPoint Template
POV	Persistence of Vision ray-tracer
PP4	Picture Publisher 4 bitmap
PPA	Microsoft PowerPoint Add-in
PPF	Turtle Beach Pinnacle Program File
PPM	Portable Pixelmap bitmap
PPP	Parson Power Publisher
PPP	Serif PagePlus desktop publishing default output
PPS	Microsoft PowerPoint slide show
PPS	Paint Shop Pro image
PPT	Microsoft PowerPoint presentation
PRC	3Com Palmpilot resource (text or program) file
PRE	Lotus Freelance presentation
PRF	Windows system file
PRF	Macromedia Director settings file
PRG	dBase, Clipper, and FoxPro program source files
PRG	WAVmaker program
PRJ	3d Studio (DOS) project file
PRN	Print Table (space delimited text)
PRN	DataCAD Windows Printer file
PRS	Harvard Graphics for Windows presentation
PRT	A print-formatted file
PRV	A PsiMail Internet provider template file
PRZ	Lotus Freelance Graphics 97 file
PS	Postscript-formatted file (a Postscript printer-ready file)
PSB	Pinnacle Sound Bank
PSD	Adobe Photoshop bitmap
PSI	PSION a-law audio
PSM	Protracker Studio Module format
PSM	Sound data for Epic's games
PST	Microsoft Outlook Personal Folder File
PTM	Polytracker music module (MOD) file
PUB	Ventura Publisher publication
PUB	Microsoft Publisher document
PWD	Microsoft Pocket Word document
PWL	Windows 95 password list file
PWP	Photoworks image file (a roll of file that can be viewed using
PWZ	Microsoft PowerPoint Wizard
PXL	Microsoft Pocket Excel spreadsheet
PY	Save emessages from Yahoo
QAD	PF QuickArt Document
QBW	QuickBooks for Windows file
QD3D	Apple's QuickDraw 3D Metafile format
QDT	Quick Books data file from the Quicken UK Accountancy/Tax/Invoice program
QFL	FAMILY LAWYER document
QIC	Microsoft Backup file
QIF	QuickTime-related image (MIME)
QIF	Quicken Import File
QLB	Quick Library
QM	Quality Motion file
QRY	Microsoft Query
QST	Quake Spy Tab file
QT	QuickTime Movie
QTI	QuickTime-related image
QTIF	QuickTime-related image
QTM	QuickTime Movie
QTP	QuickTime Preferences file
QTS	Mac PICT image file
QTS	QuickTime-related image
QTX	QuickTime-related image
QW	Symantec Q&A Write program file
QXD	Quark XPress file
R	Pegasus Mail resource file
RA	Real Audio sound
RAM	RealAudio metafile
RAR	RAR compressed archive (Eugene Roshall's format)
RAS	Sun Raster Images bitmap
RAW	Raw File Format (bitmap)
RAW	Raw signed PCM data
RAW	Raw signed PCM data
RBH	Maintained by RoboHELP, the RBH file adds to the information contained in the Help project file
RDF	Resource Description Framework file (related to XML and metadata)
RDL	Descent Registered Level
REC	Recorder macro
REC	RapidComm voice file
REG	Registration file
RES	Microsoft Visual C++ Resource
RFT	Revisable Form Text (part of IBM's DCA or Document Content Architecture)
RGB, SGI	Silicon Graphics RGB files
RL2	Descent2 Registered Level
RLE	Run-Length Encoded bitmap
RM	Real Audio video file
RMD	Microsoft RegMaid document
RMF	Rich Map Format (used by 3-D game editors to store a map)
RMI	MIDI music
ROV	Rescue Rover data file
RPM	RedHat Package Manager package (for Linux)
RPT	Microsoft Visual Basic Crystal Reports file
RRS	save file for the ace game Road Rash
RSL	Borderland's Paradox 7 reports
RTF	Rich Text Format document
RTK	Used by RoboHELP to simulate the search feature of Windows help
RTM	Real Tracker music module (MOD) file
RTS	RealAudio's RTSL document
RTS	RoboHELP to speed complex operations
RUL	Extension used in InstallShield
RVP	Microsoft Scan Configuration file (MIME)
RXX	RAR compressed files from a multi-volume archive (xx = a number from 01 to 99)