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| Ext. | Description |
|---|---|
| M | Function and commands (Matlab M-file/Mathematica) |
| M | Common binary file name extension (Maple) |
| M | Macro module (Brief) |
| M | Objective-C language source code file (gcc) |
| M | Script file (Miranda programming language) |
| M | Standard package (Mathematica) |
| M_U | Backup of boot sector FAT and boot dir (MazeGold) |
| M11 | Sound (Farallon's MacRecorder format) (sampling rate 11k) |
| M11 | Text file (MASS11) |
| M1A | MPEG-1 audiostream |
| M1S | MPEG-1 systemstream |
| M1V | Moving Pictures Experts Group video (MPEG-1 IPB) |
| M2 | Modula 2 language source code file |
| M22 | Sound (Farallon's MacRecorder format) (sampling rate 22k) |
| M2A | MPEG-2 audio |
| M2V | MPEG-2 IPB videostream |
| M3 | Modula3 language source code file |
| M3A | MPEG-3 audio |
| M3D | Corel Motion 3D Scene movie |
| M3U | Playlist file |
| M4 | M4 preprocessor file |
| M65 | 6502er Code (6502-Emulator PdL) |
| M7 | Sound (Farallon's MacRecorder format) (sampling rate 7k) |
| MA | Ascii file (notebook) (Mathematica) |
| MA | hDC products for MicroApp executable files |
| MA3 | Harvard Graphics 3.0 macro |
| MAC | MacPaint bitmap image, black & white, PackBits compressed |
| MAC | MACro file |
| MAC | Assembly Language file |
| MACP | Apple Macintosh MacPaint bitmap image |
| MAD | MS Access Module Shortcut |
| MAF | MS Access Form Shortcut |
| MAG | Woody Lynn's MAG graphics format (MPS Magro Paint System) |
| MAH | Mahjongg Solitaire settings |
| MAI | Mail message (VAX) |
| MAI | PCTools file |
| MAILINI | Mail initialization file of Ms Internet Mail for Win 3.1 |
| MAK | Project file used by some programming languages like Visual Basic |
| MAM | MS Access Macro Shortcut |
| MAN | Manual |
| MINIFEST | Windows XP manifest file (XML) |
| MAP | Card document of Route 66 |
| MAP | ColorMAP intensities and indices color palette |
| MAP | Debug info used by some programming languages |
| MAP | Micrografx Picture Publisher format data |
| MAP | Atlas MapMaker geographical map |
| MAP | Linker map file |
| MAP | AccView network map |
| MAQ | MS Access Query Shortcut |
| MAR | MS Access Report Shortcut |
| MAR | Assembly program (VAX Macro) |
| MARM | Makefile for MARM platform (EPOC) |
| MAS | Lotus Freelance SmartMASter set |
| MAT | MATlab sound |
| MAT | MS Access Table Shortcut |
| MAX | Max language source code file |
| MAX | Scene (3D Studio Max) |
| MAX | MAX source code |
| MAZ | Data (dVS/dVISE) |
| MAZ | Hover maze game data |
| MB | Paradox memo field values for database |
| MB | Binary file (bitmaps etc.) (Mathematica) |
| MB1 | Apogee Monster Bash game data |
| MBFAVS | Stardent AVS X bitmap image |
| MBFS | Stardent AVS X bitmap image |
| MBK | dBASE IV multiple index file backup |
| MBM | EPOC multi-bitmap file |
| mbox | Mailbox file |
| MC | M3CG intermediate language file (Modula-3) |
| MC | Manual Chapter (NRC Inspection Manual) |
| MC$ | Magic Xchange package (Magic Cap file archive) |
| MCA | ModCA IOCA |
| MCC | Shortcut to The Microsoft Network |
| MCC | Mathcad configuration file |
| MCC | Dialer10 calling card |
| MCD | MathCaD file |
| MCF | Mathcad font file |
| MCF | Hotsauce graphics |
| MCI | Command script (Media Control Interface) |
| MCI | MCI Command Set |
| MCL | MultiEdit macro library |
| MCM | Enable Macro |
| MCP | Capsule application script |
| MCP | Composed Media multimedia file (NetMC Player) |
| MCP | Mathcad printer driver |
| MCS | MathCAD image |
| MCW | Text document (MacWrite II/MS Word for Macintosh) |
| MD | Compressed file archive (MDCD) |
| MD | MATH-Designer file |
| MD5 | Checksum file for .SHN audio |
| MDA | MS Access Add-in |
| MDB | MS Access DataBase |
| MDE | MDE database (MS Access) |
| mdf | Menu Definition File |
| MDI | MIDI-sequention sound |
| MDL | Geometrical model (3D Design Plus) |
| MDL | Object design model (Rational Rose 98) |
| MDL | Spreadsheet (CA-Compete!) |
| MDM | Modem definition (TELIX) |
| MDN | MS Access Blank Database |
| MDP | Project workspace (MS Developer Studio) |
| MDR | Microdrive file (ZX Spectrum emulator) |
| MDT | MS Access Add-in Data |
| MDT | Data table (Ms ILink incremental linker) |
| MDW | MS Access Workgroup Information |
| MDX | Maintained dBASE database index |
| MDZ | MS Access Database Wizard Template |
| MDZ | Description of music module (Cubic Player/Cross-View) |
| ME | As 'Read.me' a textfile probably describing an application |
| ME | Configuration (MultiEdit) |
| ME | Formatted manual page with me macros |
| ME! | As 'Read.me!' an urgent textfile probably describing an application |
| MEB | Macro Editor bottom overflow file (WordPerfect Library) |
| MEC | MECCA source (Maximus) |
| MED | Sound (Amiga MED/OctaMED Module) |
| MED | Macro Editor delete save (WordPerfect Library) |
| MED | OctaMed music file |
| MEM | Macro Editor macro (WordPerfect Library) |
| MEM | Memory variable save file (Clipper/dBASE IV/FoxPro) |
| MEM | Clarion MEMos datafile |
| MEM | Ways for Windows lexicon file |
| MEQ | Macro Editor print queue file (WordPerfect Library) |
| MER | Macro Editor resident area (WordPerfect Library) |
| MES | Macro Editor work space file (WordPerfect Library) |
| MES | MESsage |
| MET | OS/2 METafile |
| MET | Omnipage Pro document |
| MET | Macro Editor top overflow file (WordPerfect Library) |
| MEU | Menu group (DOS Shell) |
| MEX | Dynamically linked subroutines (Macintosh) (Matlab) |
| MEX | Macro Editor expound file (WordPerfect Library) |
| MEX | MEX file (executable command) |
| MEX4 | Dynamically linked subroutines (Sun-4/SPARC) (Matlab) |
| MEXDS | Dynamically linked subroutines (DECStation) (Matlab) |
| MEXHP3 | Dynamically linked subroutines (HP9000/series 300) (Matlab) |
| MEXHP7 | Dynamically linked subroutines (HP9000/series 700) (Matlab) |
| MEXN | Dynamically linked subroutines (NeXT) (Matlab) |
| MEXRS6 | Dynamically linked subroutines (IBM RS/6000) (Matlab) |
| MEXSG | Dynamically linked subroutines (SGI) (Matlab) |
| MF | Metafont text file (TeX) |
| MFD | Monadic functions (ABC programming language) |
| MFJ | MetaFont job (batch input) |
| MFM | Music format (DMP) |
| MFT | Style file (MetaFont source formatter) |
| MG | Modula-3 generic module source |
| MGF | ASCII-based 3D rendering Materials and Geometry Format |
| MGF | Micrografx font |
| MGR | MGR bitmap image |
| MGX | Micrografx Designer drawing |
| MHT | Message HTML file |
| MHTML | Message HTML file |
| MI | MIscellaneous |
| MIB | SNMP MIB file |
| MIC | Microsoft Image Composer data |
| MID | MIDI-sequention sound (Musical Instrument Digital Interface) |
| MIDI | MIDI-sequention sound |
| MIF | Image Magick Image File Format |
| MIF | FrameMaker data |
| MIF | PC system component DMI attributes (Management Information Format) |
| MIFF | Image Magick Image File Format |
| MII | MicroStat-II datafile |
| MIL | Raster graphics (CALS Group IV Type 2) |
| MIM | MIME encoded file |
| MIME | Message in MIME format (RFC822) |
| MIRRORFIL | saved FAT |
| MIS | MISsion file (many games) |
| MITSU | Bitmap image (Mitsubishi S340-10 color sublimation printer file) |
| MIX | MS Windows sound MIX |
| MIX | Power C object file |
| MJF | Mjuice secure music file |
| MK | Makefile |
| MKE | MS Windows SDK MaKEfile |
| MKF | System-Makefile (Visual C++) |
| MKG | Makefile |
| MKI | Japanese graphics MAKIchan format (MagView 0.5) |
| MKR | T-Online macro file |
| MKS | TACT data |
| MKW | Michael K. Weise compressed audio file |
| ML | ML language source code file |
| ML3 | Milestones 3.x project |
| ML4 | Milestones Projektplanung |
| MLB | Symphony macro library file |
| MLI | Autodesk 3D Studio material file |
| MLM | Saved email (Novell GroupWise using WP5.1 format) |
| MM | MultiMate Advantage II text document |
| MM | Meme virtual reality world |
| MME | MIME encoded file |
| MMF | Mail Message File (Ms Mail) |
| MMM | MultiMedia Movie format (RIFF RMMP) (MacroMind Director 3.x) |
| MMO | MeMO writer file (RapidFile) |
| MMP | Output video format from Bravado board |
| MMP | makmake makefile project (EPOC) |
| MND | Cerious MaNDelbrot image |
| MND | Menu source (AutoCAD Menu Compiler) |
| MNG | Multiple-image Network Graphics bitmap image |
| MNG | Map (DeLorme Map'n'Go) |
| MNI | Cerious MaNDelbrot image |
| MNT | Additional (FPT) menu description file (FoxPro) |
| MNU | DOS mouse MeNU |
| MNU | HP NewWave advanced macro |
| MNX | AutoCAD compiled menu |
| MNX | Main (DBF) menu description file (FoxPro) |
| MNY | MS Money account book |
| MO | Modula-3 object file |
| MOB | Device definition (PEN Windows) |
| MOCHA | Javascript |
| MOD | Music (Amiga MODule format) (DMP/FastTracker/MDP/Protracker/Soundtracker) |
| MOD | MS Multiplan spreadsheet |
| MOD | File implementing DOS support for Windows DLL's |
| MOD | MODel definitions (EPOC) |
| MOD | Clarion Modula-2 language source code file |
| MOD | Kernel-Modul (Windows) |
| mod | Modula - 2 - Quellcode |
| MOD | Modula-2/Oberon Quelltext |
| MOI | French textfile, As Lisez.moi = Read.me in French |
| MOL | File list (Windows MOD-Player) |
| MON | MONitor description (ReadMail) |
| MOO | MoonRock language source code file |
| MOOV | Quicktime movie |
| MOOV | QTVR panorama |
| moov | Movie (Qicktime) |
| MOP | M. Fujimiya's Morpher for Windows 1.4 work file |
| MOTIF | Microangelo Motif |
| MOV | Quicktime Virtual Reality |
| MOV | AutoCAD AutoFlix MOVie |
| mov | Movie (Qicktime) |
| MOZ | Netscape temporary cache file |
| MP | MultiPlan |
| MP | Movie (MPEG compressed) |
| MP1 | MPEG audio file |
| MP2 | Sound (MPEG-1 Layer II Audio Stream) |
| MP2V | Moving Pictures Experts Group, see also .MP2 |
| MP3 | MPEG-1 Layer III Audio Stream (= highly compressed audio) |
| MPA | MPEG-1 sound, PCM digitized, high compression |
| MPC | MS Project Calendar file |
| MPD | Monadic predicates (ABC programming language) |
| MPD | Mini port driver |
| MPE | MPEG movie (Motion Pictures Experts Group) |
| MPEG | MPEG movie (Motion Pictures Experts Group) |
| MPM | Mathplan macro (WordPerfect Library) |
| MPNT | MacPaint bitmap image, black & white, PackBits compressed, see .MAC |
| MPP | Project file (Ms Project) |
| MPR | FoxPro generated executable menu file |
| MPT | Multipage TIFF bitmap image |
| MPV | MPEG movie, no sound |
| MPV | MS Project View file |
| MPV2 | Moving Pictures Experts Group |
| MPX | FoxPro compiled executable menu file |
| MRB | Multiple Resolution Bitmap image (MS C/C++) |
| MRC | Bibliographic data (Machine-Readable Cataloging records) |
| MRG | Power-Basic Merger file |
| MRI | HP NewWave object file |
| MRK | CSI MaRKup file (CAD format) |
| MRK | Windows 95 user benchmark |
| MRS | WordPerfect Macro ReSource |
| MRS | Macro resource file |
| MS | Formatted manual page with ms macros |
| MS | Modula-3 intermediate assembly file |
| MS | Maple worksheet |
| MS | "CHKLIST.MS" - Directory-Info |
| MSC | MS C makefile |
| MSDL | Manchester Scene Description Language, 3D rendering? |
| MSG | MeSsaGe text |
| MSK | Saved mask from Autodesk Animator |
| MSN | MS Network component |
| MSP | MS Paint bitmap image |
| MSP | Windows installer Patch |
| MSS | Manuscript text file (Perfect Writer/Scribble/MINCE/Jove) |
| MST | Presentations |
| MST | MS Test document |
| MST | Minispecification file (Prosa) |
| MST | MS Windows SDK setup script |
| MSW | MS Word text document |
| MSX | Image format |
| MSX | Compressed CP/M file archive (MSX) |
| MTH | Derive MaTH file |
| MTL | Wavefront |
| MTM | MultiTracker Module music |
| MTV | MTV Raytracing image format |
| MTW | Minitab data file |
| MU | Quattro pro for DOS MenU definition |
| MUS | Sound file (MusicTime/Doom) |
| MVB | MS Multimedia Viewer data |
| MVF | Stop frame file (AutoCAD AutoFlix) |
| MVI | Movie command file (AutoCAD AutoFlix) |
| MVP | MediaView Project |
| MVW | Saber LAN log file |
| MW | MacWrite II text document |
| MW2 | Mech Warrior 2 game file |
| MWF | ProMotion animation |
| MWII | MacWrite II text document |
| MWP | SmartMaster (Lotus Word Pro) |
| MX | Matlab common matrix routines |
| MX | Modula-3 linker information |
| MX3 | Dynamically linked subroutines (80386/486 Ms Windows) (Matlab) |
| MXL | PackRat 5.0 support file |
| MXS | Maxis game data file (e.g. SimCity) |
| MXT | MS C data |
| MYP | Presentation (MM Make Your Point) |
Did you like my page, one of my freeware applications or online tools?
Then, please donate via PayPal in order to help keeping its content free - each amount is welcome!