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    File extensions starting with M

    M Objective-C Language Source Format
    M!95 Adobe Director For Mac
    M-JPEG M-JPEG
    M01 MicroStation Modification Resource
    M10 Microsoft Money 2002 Data
    M11 Microsoft Money 2003 Data
    M12 Microsoft Money 2004 Data Format
    M13 Microsoft Media Viewer
    M14 Microsoft Media Viewer
    M15 Apple QuickTime Format
    M16 Microsoft Money 2007 Data
    M1A MPEG-1 Audiostream Format
    M1C IBM Voice Type Languages Newuser
    M1I IBM Voice Type Languages Newuser
    M1PG IFinish Video Format
    M1S MPEG-1 System Stream
    M1V Moving Pictures Experts Group Video (MPEG-1 IPB)
    M2 World Of Warcraft Model Object File Format
    M21 MPEG-21 Video Format
    M25 Symantec Endpoint Protection Manager
    M2A MPEG-2 Audio
    M2C IBM Voice Type Languages Newuser
    M2D HTC Manila 2D For Windows Mobile Skin
    M2DCT HTC Manila 2D For Windows Mobile Skin
    M2F Maxthon Filter Package
    M2I IBM Voice Type Languages Newuser
    M2L Maxthon Language Package
    M2M TiMidity++ M2M Settings
    M2P MPEG-2 Stream File Format
    M2R Avaya Mib2Rules Perl Script
    M2S MPEG-2 Audio Video Format
    M2T MPEG-2 Transport Stream Format
    M2TS MPEG-2 Stream (Blu-Ray)
    M2U Maxthon Layout
    M2V MPEG-2 Packetized Elementary Stream
    M3 Blizzard StarCraft 2 MDX3 Model Format
    M32 Duke Nukem 3D Script
    M3C IBM Voice Type Languages Newuser
    M3D DIALux 3D Object Format
    M3G Nokia Mobile 3D Graphics Program Format
    M3H Starcraft 2 Model Data
    M3I IBM Voice Type Languages Newuser
    M3S Myst III Exile Saved Game
    M3T Myst 3 Exile Text
    M3U MP3 Songs Playlist Format
    M3U8 UTF-8 M3U Playlist Format
    M3URL SMIL MP3 Playlist
    M3V DJ Mix Pro Playlist
    M3X MAGIX Digital Photo Maker PhotoCD Playlist
    M4 M4 Preprocessor Macro Format
    M4A MPEG-4 Compressed Audio Format
    M4B MPEG-4 Audio Layer Audio Book Format
    M4C IBM Voice Type Language Newuser
    M4D Sage MAS 90 Data
    M4E MPEG-4 Video Format
    M4F Sony Network Camera MPEG-4 Video
    M4I IBM Voice Type Languages Newuser
    M4L Sage MAS 90 Data
    M4P Apple ITunes Music Store Audio Format
    M4R Apple IPhone Ringtone Format
    M4S Myst IV: Revelation Save Game
    M4T Sage MAS 90 Table
    M4U MPEG-4 Playlist Format
    M4V MPEG-4 Video File Format
    M51 ARM Keil Tools Linker Listing
    M64 Mupen64 Movie Capture
    M68 Turbo Pascal Dos
    M75 Apple QuickTime Format
    M7A MapKing Map
    M7D MapKing Navigation Map
    M7P Multilizer PDF Translator Project
    M8 Heretic II MipMap Image
    M?? Ingres Modify Table/Index
    MA Autodesk Maya ASCII Scene Format
    MA0 Diablo II Act 1 Saved Map Progress
    MA1 Monarch Audio Format
    MA1.MMF SMAF Synthetic Music Mobile Application Format
    MA2 Bibexcel
    MA2.MMF SMAF Synthetic Music Mobile Application Format
    MA3 Harvard Graphics Macro
    MAB Mozilla Address Book Format
    MAC MacPaint Bitmap Image
    MACA MacWrite Document
    MACBIN MacBinary Archive
    MACP Apple Macintosh MacPaint Bitmap Image
    MACS MADRIX Encrypted Script
    MAD Microsoft Access Module Shortcut Format
    MAE Maestro Molecular Model Format
    MAF Microsoft Access Form Shortcut Format
    MAFF Mozilla Archive Format
    MAG Microsoft Access Diagram Shortcut Format
    MAGIC Magic Mail Monitor Configuration
    MAGIK Magik Source Code Format
    MAHJONGTITANSSAVE-MS Mahjong Titans Save Game Format
    MAI Microsoft Mail Message Format
    MAILDB MSN Mail
    MAILHOST E-mail Server Preferences Format
    MAILLOC Apple Mac OS X Finder Mail Internet Location
    MAILPLANELICENSE Mailplane License Format
    MAILSTATIONERY Apple Mail
    MAILTOLOC Apple Mail Mail Address Format
    MAIN FileMaker Dictionary
    MAJ Camduct Job
    MAK Make Format
    MAKE Makefile
    MAKEFILE Make Format
    MAKER Adobe Framemaker
    MAKI Winamp MAKI Compiled Script
    MAKO Mako Tamplate Format
    MAL MadAppLauncher Settings Format
    MAM Microsoft Access Macro Shortcut Format
    MAML Microsoft Assistance Markup Language
    MAN Unix Text Manual Format
    MANAGED_MANIFEST Silverlight Manifest
    MANI Mine-imator Project Format
    MANIFEST Manifest Format
    MANIFEST-DESKTOP Ubuntu Desktop CD Manifest
    MANM Vietcong Game Data Format
    MAO Dragon Age Origins MAO XML
    MAP Geographical Map Format
    MAPIMAIL Windows Send To Mail Recipient Format
    MAPLET Maplet World Format
    MAPLIB Mscape Map
    MAPSDATA Apple IOS Map Data Format
    MAPX Mapjects GRYD Webserver Format
    MAQ Microsoft Access Query Shortcut Format
    MAR Microsoft Access Report Shortcut Format
    MARC MAchine-Readable Cataloging (MARC) Document
    MARKDN Markdown Markup Language Document Format
    MARKDOWN Markdown Markup Language Format
    MARS Adobe Mars Format
    MARSHAL Marshal Editor Data Migration Model Format
    MART Martview Ebook Format
    MAS Microsoft Access Stored Procedures Format
    MASH Java
    MASK SpeedGrade Color Mask Format
    MASSEFFECTPROFILE Mass Effect User Profile
    MASSEFFECTSAVE Mass Effect Saved Game
    MASTER ASP Master Page Format
    MAT Microsoft Access Table Shortcut Format
    MATCH-RDB RDB
    MATERIAL Rigs Of Rods Texture Reference Format
    MATH AnalyticMath
    MATLAB Matlab Script
    MATO Atomic Combat Saved Game Format
    MATPROJ Dragon Age Origins Material
    MAU Media Attachment Unit Format
    MAUD Amiga MAUD Sound
    MAV Microsoft Access View Format
    MAW Microsoft Access Data Access Page Format
    MAX 3D Studio Max Scene Format
    MAXC 3D Studio Max Container Format
    MAXD PaperPort Annotation
    MAXM Paperport
    MAZ Microsoft Windows Hover! Maze Format
    MB Autodesk Maya Binary Scene Format
    MB1 Monster Bash Game Data
    MB3 Minimal Board Editor (MBE)
    MB4 Model Builder Model Design
    MBA Martus Human Rights Bulletin System
    MBAC MascotCapsule Resource
    MBAS MikroBasic Source Code
    MBB ManaBook Format
    MBBK ManaBook Book Kit Format
    MBC Mulberry E-mail Client Cache
    MBD Multimedia Builder MP3 Authoring Format
    MBDB Apple IOS Backup Manifest
    MBDX Apple IOS Backup Manifest
    MBE MVP Baseball 2005 Game
    MBF Microsoft Money Backup Format
    MBFAVS Stardent AVS X Bitmap Image
    MBFS Stardent AVS X Bitmap Image
    MBFX AVS X Image
    MBG Mailbag Assistant E-mail Archive Format
    MBI MagicISO Multi-bootable Information Format
    MBK DBASE IV Multiple Index File Backup
    MBKP Memeo Instant Backup Backup
    MBL Logger Pro Experiment Data Format
    MBM EPOC Multi-bitmap Format
    MBOX Mail Mailbox Format
    MBP Mobipocket EBook Auxiliary Format
    MBP1 Kindle Touch Annotation
    MBR Zune Smooth Streaming Format
    MBS Opera Mailbox Format
    MBSA Microsoft Baseline Security Analyzer Format
    MBSB Mamut Business Software Company Database Backup
    MBSYNCSTATE Mbsync Folder Backup
    MBT Blue Card Manager Merit Badge Template Format
    MBTEMMPLATE ModelBaker Custom Template Directory
    MBV JVC Everio MediaBrowser Movie
    MBW Easy Mail Backup Wizard Format
    MBX E-mail Mailbox Format
    MBZ Pogoshell NES Emulator Plugin
    MC Microsoft Windows Localized Message Table Resource
    MC1 MedCalc Data Format
    MC2 MasterCook Cookbook Recipe Text Data Format
    MC3 Bridge Design Modeler 3D Match-casting Geometry Control
    MC4D Cinema 4D 3D Graphic
    MC5 Poser 5 Material Format
    MC6 Poser 6 Material Format
    MC8 Mastercam V8
    MC9 Mastercam V9 CAD Format
    MCA Minecraft Anvil Format
    MCACC MCACC Measurement Data
    MCB NEPLAN Project
    MCBN Microsoft Excel 4 For Mac Chart
    MCC Amiga MUI External Class Library
    MCD VectorWorks Drawing Format
    MCDB Adobe Premiere Pro Media Cache Database
    MCDX Mathcad Prime Document Format
    MCF Mathcad Font Format
    MCFI Autodesk Maya Initial Fluid Cache Format
    MCFP Autodesk Maya Fluid Cache Playback Format
    MCGAME Minecraft Backup Format
    MCI Media Control Interface Command Script Format
    MCK Macro Keys Encrypted Macro
    MCL Microsoft Media Center Application Shortcut Format
    MCLEVEL Minecraft Map Format
    MCMAC MacGourmet MasterCook Document
    MCMETA Minecraft Animation Settings Format
    MCML Microsoft Windows Media Center MCML
    MCO MSN Messenger Wink Format
    MCP MSN Content Plus Installer Format Archive
    MCR Autodesk 3D Studio Max Macroscript Format
    MCRP MobyExplorer Encrypted Format
    MCS MathCAD Raster Picture Image Format
    MCSP My Craft Studio Project Format
    MCSX My Craft Studio Professional Format
    MCT Musicator MIDI
    MCUSW Nokia Mobile Phones With Symbian Firmware
    MCV ManyCam Effect
    MCW Microsoft Word 5 For Mac Document Format
    MCWORLD Minecraft World Backup Format
    MCX Mastercam X And X2 File Format
    MCXE MedicinesComplete Data Format
    MCXML Microsoft Office 2013 XML Settings
    MCZ Poser Compressed Material Format
    MD MDCD Compressed File Archive
    MD0 Adobe Photoshop Format Browser Metadata Cache Format
    MD03 Adobe Director
    MD1 GEAR CD Suite CD Image Format
    MD2 Quake 2 Model Format
    MD2P MessengerDiscovery
    MD2S MessengerDiscovery
    MD3 Quake 3 Model Format
    MD4 Quake 3 MD4 Skeletal Model Format
    MD5 Checksum Format
    MD5.TXT Message Digest 5 Hash Format
    MD5ANIM Doom 3 ID Tech 4 Game Engine Model Animation Format
    MD5CAMERA Doom 3 ID Tech 4 Game Engine Model Camera Format
    MD5MESH Doom 3 ID Tech 4 Game Engine 3D Mesh Format
    MD8 GarageCUBE Modul8 Project Format
    MDA Microsoft Access Add-in Format
    MDAT REW Measurement
    MDB Microsoft Access Database Format
    MDBACKUP Apple IPhone Backup Format
    MDBHTML Microsoft Office Access HTML Document Format
    MDBX Access Based Database
    MDC Image Minolta RD175
    MDD Point Oven Deformation Data Format
    MDDATA Apple IPhone Backup Data Format
    MDE Microsoft Access Compiled Database (application) Format
    MDES Trimaran Machine Description
    MDF Alcohol 120% Disc Image File Format
    MDG Enterprise Architect
    MDHTML Microsoft Access HTML
    MDI Microsoft Office Document Imaging File Format
    MDIMPORTER Spotlight Importer Setting
    MDINFO Apple IPhone Info Format
    MDK Astra Schedule Schedule
    MDL Flight Simulator 95/98 3D Model Format
    MDLE Motion Description Language Extended
    MDM HLM Multivariate Data Matrix Format
    MDMP Microsoft Windows Minidump Format
    MDN Microsoft Access Blank Database Template Format
    MDO Alcohol 120% Split Image
    MDOWN Markdown Markup Language Format
    MDP Microsoft Visual C++ Visual J++ MAK File (old Project Workspace)
    MDPF Mac OS X Modem Preferences
    MDPL MacDraw II
    MDR ZX Spectrum Microdrive Emulator
    MDRC MADRIX DMX Remote Configuration
    MDRW MacDraw
    MDS Alcohol 120% Image File (media Descriptor File) Format
    MDT Microsoft Access Database Template Format
    MDTEXT Markdown Markup Language
    MDTXT Markdown Markup Language
    MDUS MessengerDiscovery
    MDV QLAY
    MDW Microsoft Access Workgroup Information Format
    MDWN Markdown Markup Language
    MDX Media Data EXtended Image Format
    MDZ Microsoft Access Wizard Template Format
    MDZIP MagicDraw Compressed Project Format
    ME Readme Text Format
    ME2HEADMORPH Mass Effect 2 Head Morph
    ME2MOD Mass Effect 2 Game Modification Format
    MEA Mastersizer 2000 Sample Analysis
    MEB PRO100 Library Format
    MECH Pro/MECHANICA Settings
    MECONTACT Microsoft Live Messenger
    MED Amiga MED Sound Format
    MEDIAWIKI Mediawiki Source
    MEF Mamiya ZD MEF Image Format
    MEG MEGA Data Format
    MEGA Megacubo Metafile
    MEL Maya Embedded Language
    MELL RedleX Mellel Document Format
    MELLEL RedleX Mellel Document Format
    MEM Microsoft Visual FoxPro Mem Format
    MEMB Pro/ENGINEER Temporary
    MEN MenuPro Restaurant Menu Design
    MENC Microsoft Windows Mobile Encrypted Format
    MENU Apple Mac OS X SystemUIServer MenuExtra Plugin Format
    MENUDATA VMWare Cache
    MEO MEO Encrypted Format
    MEQ Corel WordPerfect Macro Editor Print Queue
    MER Corel WordPerfect Macro Editor Resident Area Format
    MERLIN2 Merlin Project Format
    MERLINLICENSE Merlin License Format
    MES Corel WordPerfect Macro Editor Work Space
    MESA OpenGL GLUT
    MESH 3D Graphic Format
    MET EMule Cached Information Format
    META RealPlayer Metafile
    META4 Metalink 4.0
    METADATA_NEVER_INDEX Spotlight Never Index Format
    METALINK Metalink 3.0
    METASTOCK Metastock Data
    METRICLOG Apple IOS Diagnostic
    MEU DOS Shell Menu Group
    MEW MultiEdit Configuration
    MEX Corel WordPerfect Macro Editor Expound Format
    MEX4 Sun-4/SPARC Dynamically Linked Subroutines
    MEXDS MATlab Dynamically Linked Subroutines
    MEXHP3 Matlab HP9000/series 300 Dynamically Linked Subroutines
    MEXHP7 Matlab HP9000/series 700 Dynamically Linked Subroutines
    MEXN Matlab NeXT Dynamically Linked Subroutines
    MEXRS6 Matlab IBM RS/6000 Dynamically Linked Subroutines
    MEXSG Matlab Dynamically Linked Subroutine
    MEXW32 MATlab Program Executable
    MF Java Manifest Format
    MF2 Authorware Mediator5 Multimedia
    MF4 Version 4.0 Measurement Data Format
    MFA Multimedia Fusion Development Format
    MFALIST Ashampoo Photo Commander Slideshow List
    MFASL Netscape XUL Fastload Format
    MFCRIBBON-MS MFC Ribbon Definition XML Format
    MFD Adobe Multiple Master Font Metrics Directory
    MFE Character Studio Format
    MFF Cakewalk MIDI
    MFG ProEngineer Manufacturing
    MFI Windows 98 Resource Kit
    MFIL Blizzard Software Update Format
    MFJ MOBCAL Data
    MFK Memsoft OS/2 Database
    MFL Mozilla Firefox XUL Fastload Format
    MFM VTeX Multiple Master Font Metrics
    MFO Mediaface Online CD Label Software Project Format
    MFP MediaFACE CD Label Software Format
    MFPS Scientific Calculator Plus Script
    MFR Autodesk Moldflow Result
    MFS MetFS Encrypted FUSE Based Formatsystem Format
    MFT Mediaface Project Template Format
    MFU Backdoor.Win32.Agent.mfu Virus Format
    MFV MobileFrame Device Pack Format
    MFW Motorola MSS Box Firmware Format
    MFX Multimedia Fusion Extension Format
    MG EarAche Audio
    MG1 MusiGenesis Project
    MG2 Band-in-a-Box Song
    MG4 Band-in-a-Box Song
    MG9 Band-in-a-Box Song
    MGA Manga Comics Document Format
    MGB Paragon5 Gameboy Tracker Audio
    MGC MGCSoft Equation Illustrator Data Format
    MGCB MGCSoft Equation Illustrator Project Format
    MGD Master Grade Gradebook
    MGDATABASE MacGourmet Deluxe Database Format
    MGE MGE Data Server Project
    MGF ASCII-based 3D Rendering Materials And Geometry Format
    MGK ImageMagick Settings Format
    MGL Age Of Empires II Age Of Kings Game Format
    MGLR Magellan Routes
    MGLT Magellan Tracklogs
    MGLW Magellan Waypoint
    MGM MGCSoft Equation Editor Macro File Format
    MGMF MindGenius Mind Map
    MGMT MindGenius 2-3 Template
    MGMX MindGenius Map Format
    MGN Modern Genealogy Database
    MGO MacGourmet Recipe Format
    MGOURMET Mariner MacGourmet Document Format
    MGOURMET3 Mariner MacGourmet Document Format
    MGR MGR Bitmap Image
    MGS MGCSoft Vector Shapes Format
    MGSPOT MacGourmet Metadata
    MGT ZX Spectrum Emulator Disk Image
    MGTHEME MacGourmet Theme Format
    MGTX MindGenius XML Template Format
    MGU Band-in-a-Box MIDI
    MGV Sony PSP Video Format
    MGX Micrografx Designer Drawing Format
    MGZ Metal Gear Solid Game Archive
    MHD Fallout 3
    MHE MHwinEHE Project
    MHK Riven Movie Data
    MHP Mailshift Internet Mail Document
    MHS Xilinx Platform Studio Hardware Specification Format
    MHT Mime HTML (MHTML) Format
    MHTENX Egis Encrypted HTM
    MHTM Mime HTML (MHTML)
    MHTML Mime MHTML Format
    MHTMLENX Egis Encrypted MHTML
    MHV Husqvarna Viking Data
    MI AutoVue Graphic Plugin
    MI2 Autodesk Softimage
    MI4 NVidia PortalPlayer Firmware Update Format
    MIB MyInfo Topic Backup
    MIC Microsoft Image Composer Image Format
    MID MIDI Audio Format
    MIDI MIDI-sequention Sound Format
    MIF ImageMagick Image Format Format
    MIFF Magick Image
    MIG Windows Easy Transfer Migration Data Format
    MIH MRtrix Image Header
    MII Nintendo Wii Virtual Avatar Format
    MIK MapInfo MapImagery Encryption Key
    MIL Micro Illustrator Uncompressed Image
    MILK Winamp MilkDrop Plugin Configuration Format
    MILLPST BobCAD Post Processor Data
    MIM Multi-Purpose Internet Mail Extensions Format
    MIME Multi-Purpose Internet Mail Extensions (MIME) File Format Format (RFC822)
    MIN Minute Maker Format
    MINDNODE MindNode Document Format
    MINE Minecraft Map Format
    MINESWEEPERSAVE-MS Microsoft MineSweeper Save Format
    MINGW32 Mingw Compiler
    MINI2SF Nintendo DS Sound Information Format
    MININCSF NCSF Nintendo DS Audio Format
    MINIPSF Miniature PlayStation Sound Format
    MINIPSF2 Miniature PlayStation Sound Format
    MINISO DVDFab Miniso Disk Image
    MINIUSF Nintendo 64 Song Format
    MINT Linux Mint Installer Format
    MIO MIO Multimedia Format
    MIP Corel PaintShop Pro Multiple Image Print Format
    MIPR MacImage Hybrid CD-ROM Project
    MIR Mini Image Ripper Disk Image Format
    MIRADI Miradi Project
    MIS Mission Format
    MISO MacImage ISO+ Project
    MISSION MissionMaker Project Format
    MIT MineEdit Inventory Template Format
    MIV MapImagery Vendor Profile
    MIX Microsoft PhotoDraw Image
    MIZ Winamp Compressed Midi
    MJ2 JPEG 2000 Motion Sequence Format (ISO 15444-3) Format
    MJ3 Id Software Online Sale
    MJBOOKTEMPLATE MacJournal Book Template
    MJD Adobe Acrobat MIME Encoded Job Definition Format
    MJDOC MacJournal Document Format
    MJF Mjuice MP3 Audio
    MJG Trojan
    MJP VTech MJP Video Format
    MJP2 JPEG 2000 Motion Sequence Format (ISO 15444-3)
    MJPG Motion JPEG Video Format
    MJR Media Jukebox Registration
    MJZ Trojan.Win32.Agent.mjz
    MK Make Format
    MK3D Matroska MKV 3D Stereoscopic Video Format
    MK4 Schiller Medilog ECG Raw Data Format
    MKA Matroska Audio Format
    MKB Marmalade SDK Project
    MKC MagicKey Currency Exchange Rate
    MKD Markdown Markup Language
    MKDN Markdown Markup Language
    MKE Microsoft Windows SDK Make
    MKEXT Mac OS X Mach Kernel Extension Memory Cache
    MKEY CompeGPS Land Registration Key
    MKEYB CompeGPS Land Registration Key
    MKH WinMark Pro Mark
    MKII Mark2 SoundSystem Audio
    MKJ MKJamz Audio
    MKP Cinestar Remote Control Configuration
    MKR Train Simulator Marker
    MKS Matroska Subtitles Stream
    MKT Visual FoxPro Configuration
    MKV Matroska Video-audio Multimedia Format
    MKV3D Matroska 3D Video Format
    MKY MagicKey Configuration
    MKZ PokerOffice Database Backup
    ML ML Language Source Code Format
    ML2 Tripos MOL2 Molecule
    ML20 Mercury Messenger For Mac Video
    ML3 Milestones Project
    ML4 Milestones 4 Schedule
    ML5 Milestones Project
    ML9 Milestones Professional 2004U Schedule
    MLA WorshipCenter Pro Document
    MLB Microsoft Windows Mobile Media Library Format
    MLC Microsoft Windows Language Interface Pack Format
    MLD I-Melody Format For I-Mode
    MLE MAirList Event List
    MLF Package Download Profile
    MLG IBM Communications Server Message
    MLI F# Source Code
    MLIB Model Library
    MLK Sierra MasterCook Look Format
    MLL AutoDesk Maya Plug-in Format
    MLM Novell GroupWise Saved Email Message
    MLN Alchemy Source
    MLOCATE Gnome Desktop
    MLP Meridian Lossless Packing Audio Format
    MLR Mollier Sketcher
    MLS Miles Sound Tools Compressed DLS Format
    MLSXML Skype XML
    MLT Forecast Pro Multivariate Forecast
    MLV LabVIEW Mathscript
    MLW MainLog Data
    MLX Starcraft Saved Game
    MLY OCaml Ocamlyacc Input
    MM Apple Xcode Core Objective-C Program Source Code Format
    MM1 ActiveXperts MMS Toolkit Settings
    MM3 Mortgage Minder Saved Mortgage Configuration
    MM4 Microsoft Windows Word Processing Format
    MM6 Might And Magic 6 Saved Game Format
    MM7 Might And Magic 7 Saved Game Format
    MM8 MusicMaker V8 Audio Format
    MMA Master Album Maker Album Format
    MMAP MindManager Map Format
    MMAS MindManager Theme
    MMAT MindManager Template Format
    MMB MultiMedia Builder
    MMC Microsoft Office XP Media Content Format
    MMCH CodeWarrior Compiled Hdr
    MMCOLLECTION Microsoft Outlook Mail Manager Plug-in Collection Format
    MMD Mangodata Multi-user Database
    MMDC MediaMonkey Mobile Device Settings Format
    MMDF Multi-channel Memorandum Distribution Facility Mailbox Format
    MMDL SAPPHIRE Structure Model
    MMDR Adobe Director
    MME Multipurpose Internet Mail Extensions Format
    MMF Microsoft Mail Message Format
    MMG MKVToolNix Muxing Settings
    MMH Dragon Age Model Mesh Heirarchy
    MMIP MediaMonkey Installation Format
    MMJS Adobe JavaScript Document
    MMK MACSIMUS Define
    MML Adobe FrameMaker Format
    MMM MultiMedia Movie Format (RIFF RMMP)
    MMN Memory-Map Navigator Overlay Object
    MMO RapidFile Memo Document Format
    MMP MixMeister Studio Playlist Format
    MMPA MoreMotion Application Studio Page
    MMPF CodeWarrior Preference
    MMPR CodeWarrior Project
    MMPZ Linux MultiMedia Studio Project
    MMRC MADRIX MIDI Remote Configuration
    MMS Miles Sound Tools
    MMSW Movie Magic Screenwriter Document
    MMT CoCo Systems VisiMap
    MMU MyPM Merge Data Format
    MMV MicroMV Movie Format
    MMW AceMoney Financial Data Format
    MMX Command And Conquer Game
    MMZ MusicMatch Theme
    MN1 Microsoft Money Version 1 Data
    MN2 Descent 2 Mission
    MN3 Descent 3 Mission
    MN4 Microsoft Money 95 Data
    MN5 Microsoft Money 97 Data
    MN6 Microsoft Money 98 Data
    MN7 Microsoft Money 99 Data
    MN8 Microsoft Money 2000 Data
    MN9 Microsoft Money 2001 Data
    MNB MuPAD
    MNC AutoCAD Compiled Menu Format
    MND AutoCAD Menu Compiler
    MNE Microsoft Money
    MNF ADAMS/Flex
    MNG Multiple Network Graphics
    MNH Master Navigator Header Format
    MNI Star Trek Elite Force 2 Game
    MNIT FlashPeak SlimBrowser
    MNK My Notes Keeper Notebook Format
    MNL Autodesk AutoCAD Menu LISP Format
    MNM Autodesk 3D Studio Max Character Studio Marker Name Format
    MNO Macromedia Design Note
    MNP Ultrasoft Money
    MNR Autodesk AutoCAD Compiled Menu Format
    MNS AutoCAD Interface Settings Format
    MNT Visual FoxPro Additional Menu Description Format
    MNU Autodesk AutoCAD Menu Format
    MNV Sony PlayStation Movie Format
    MNX Visual FoxPro Main (DBF) Menu Description Format
    MNY Microsoft Money Data Format
    MO GNU Gettext Machine Object Format
    MO3 MO3 MOD Audio Format
    MO? Standard Mail Archive
    MOB MOBTV Video Format
    MOBI Mobipocket EBook Format
    MOBILECONFIG Apple IPhone Mobile Configuration Profile
    MOBILEPROVISION IOS Mobile Device Provisioning Profile Format
    MOC MOCHA Java Script
    MOCHA Adobe Mocha For Adobe After Effects
    MOD Hard Disk Camera Movie MPEG-2 Program Stream Format
    MODD Sony Video Analysis Format
    MODE Coda For Mac Plugin Format
    MODE1V3 Xcode Project Settings
    MODE2V3 Xcode Project Related
    MODEL CATIA V4 Model Format
    MODELPROJ Microsoft Visual Studio Modelling Project
    MODULE Drupal Module Format
    MODUS Adobe Mocha For Adobe After Effects Modus
    MOF Systems Management Server Managed Object Format
    MOFF Sony AVCHD Index Format
    MOG Football Mogul
    MOGG Multitrack Digital Audio Format
    MOHO Anime Studio Animation Project Format
    MOI JVC Everio Digital Audio Format
    MOJITO Limewire Kademlia
    MOKEY Adobe Mocha For Adobe After Effects Mokey
    MOL MDL Molfile Molecule Format
    MOL2 Portable Representation Of A SYBYL Molecule
    MOLOGIQ HTC EVO 3D
    MOM Managed Object Model
    MOMMA Offspring Fling Replay Format
    MON Firefox Monday Bookmark Backup
    MONET Adobe Mocha For Adobe After Effects Monet
    MONEY Money Data Format
    MONEYWELL MoneyWell Financial Data Format
    MONITORPANEL Apple Mac OS X Display Panel Extension
    MONO Bi-level Bitmap
    MONTAGE Montage Screenplay Format
    MONTE CRiSP Harvest
    MOO Apple QuickTime Movie Clip
    MOOD Amarok Moodbar Data
    MOOV Apple QuickTime Movie Format
    MOP MOPAC Input Format
    MOPINT Mopac Internal Chemical Modeller Input
    MOPOUT MOPAC Chemical Output
    MOPP Havok Engine
    MOR Corel Shared Writing Tools
    MORG Morg
    MORSE Ringtone Morse Code
    MOS Mamiya Digital Camera RAW Image Format
    MOSAIC MacOSaiX Mosaic Format
    MOSS Netscape Navigator For Mac HTML
    MOT LightWave Motion Format
    MOTN Apple Motion Motion
    MOTOR Adobe Mocha For Adobe After Effects Motor
    MOU MOU Compressed Format
    MOV Apple QuickTime Digital Movie Format
    MOVIE Apple QuickTime Movie Format
    MOX ExtendSim Model Format
    MOXEL Adobe Mocha For Adobe After Effects Moxel
    MOZ Netscape Temporary Cache Format
    MOZ-BACKUP Mozilla Backup
    MOZ-DELETE Mozilla Firefox Update
    MOZ-UPGRADE Mozilla Firefox Upgrade
    MOZEML Mozilla Thunderbird Mail Message
    MP Autodesk Maya Personal Learning Edition Format
    MP+ MPEG Plus Audio
    MP1 MPEG Audio Stream, Layer I Format
    MP10 NI Multisim V10 Project Format
    MP11 NI Multisim V11 Project Format
    MP2 Sound File (MPEG-1 Layer II Audio Stream)
    MP21 MPEG-21 Multimedia Format
    MP2A Sound File (MPEG-1 Layer II Audio Stream)
    MP2M Max Payne 2 Mod Format
    MP2S Max Payne 2 Saved Game Format
    MP2V MPEG Video Format
    MP3 Compressed Audio And Music File, Mp3 Songs Or Ringtones
    MP3A Renamed MP3
    MP3G WinCDG Pro MP3+G Karaoke
    MP4 MPEG-4 Video File Format
    MP4.INFOVID Parrot AR Drone And Gyro Flyer Video
    MP4A MPEG-4 MP4A Codec Audio
    MP4B MPEG-4 Audio Layer Bookmarkable
    MP4V MPEG-4 Video Format
    MP5 Maple Windows DOS
    MP7 NI Multisim V7 Project Format
    MP8 NI Multisim V8 Project
    MP9 NI Multisim V9 Project Format
    MP? LoseThos Compiler Map
    MPA MPEG Audio Format
    MPB MyPhoneExplorer Backup Format
    MPC MusePack Audio Format
    MPCPL Media Player Classics Playlist Format
    MPD Microsoft Project Database Format
    MPDB Windows Media Player Database
    MPDCONF Music Player Daemon Settings Format
    MPDP MixPad Project Format
    MPDS MADRIX Plexus Settings
    MPE MPEG Movie (Motion Pictures Experts Group)
    MPEG MPEG Movie
    MPEG1 Multiplexed MPEG-1/2 Format
    MPEG2 Multiplexed MPEG-1/2
    MPEG4 MPEG-4 Video Format
    MPEGA MPEG Sound
    MPF Microsoft Design Gallery Format
    MPG MPEG 1 Video File Format
    MPG2 MPEG-2 Video Format
    MPG3 MP3 Audio File For Mac
    MPG4 MPEG-4 Video
    MPGA Mpeg-1 Layer3 Audio Stream
    MPGINDEX Adobe MPEG Index Format
    MPGV MPEG-2 Video
    MPH Microsoft Publisher
    MPI InstallJammer Project Format
    MPJ MINITAB Spreadsheet Project Format
    MPK Painkiller Overdose Game Map Format
    MPKG Meta Package Format
    MPKT MOPEKS Trial
    MPL AVCHD Playlist Format
    MPLF CodeWarrior Library
    MPLS Blu-ray Movie Playlist Information Format
    MPM Corel WordPerfect MathPlan Macro Format
    MPNT MacPaint Image Format
    MPO CIPA Multi-Picture Format
    MPP Microsoft Project Plan Format
    MPPX Microsoft Project Project
    MPPZ MagicPlot Project Format
    MPP_ Microsoft Project For Mac Plan
    MPQ Blizzard Entertainment Archive
    MPQE Blizzard Encrypted Game Data
    MPR Visual FoxPro Generated Menu Program
    MPRJ Maschine Project
    MPS Microsoft Pocket Streets Map Format
    MPSUB Subtitle Format
    MPSY CodeWarrior Debug Symb
    MPS_ MPW Shell
    MPT Microsoft Project Template Tile
    MPU MPEG Layer 3 Audio Format
    MPV MPEG 1 Video Format
    MPV2 MPEG II Video Format
    MPVF CompeGPS Land Fast Vector Map
    MPW Microsoft Project Workspace Format
    MPWD MacWrite Pro
    MPWR MacWrite Pro
    MPX Microsoft Project Export Format
    MPZ Miradi Project Format
    MPZIP Multisim Pack Format
    MP_ Mobile Phone Sound Format
    MQ4 MetaTrader Custom Indicator Format
    MQH MetaTrader Trading Terminal
    MQL MetaTrader Indicator
    MQO Metasequoia 3D Image Format
    MQT MetaQuotes Language 4 MQL4 Template
    MQV Sony Movie Player File Format
    MRAW Photron Camera RAW Image
    MRB C++ Multiple Resolution Bitmap Graphic Format
    MRC MIRC Script Format
    MRD MathRevolt Infinity Document
    MREC MADRIX Record
    MRF Macintosh Font
    MRG MySQL Reference Format
    MRIMG Macrium Reflect Disk Image Backup
    MRK DPOF Digital Print Order Format Auto Print Order Format
    MRL MRLR Multimedia Retrival Markup Language
    MRM Gothic 2
    MRML 3D Slicer Scene Description Format
    MRO SharpEye Music Reader
    MRP Infinity Solution Plot
    MRS Corel WordPerfect Macro Resource Format
    MRT Microsoft Visio 2010 Installation Archive Format
    MRV MarvinSketch
    MRW Minolta Dimage RAW Image Format
    MRXS MIRAX Virtual Slide Format
    MS 3D Studio Max Script Source Code
    MS-TNEF Microsoft Transport Neutral Encapsulation Format
    MS1 VirtualBus Map Format
    MS10 NI Multisim V10 Circuit Design Format
    MS11 NI Multisim V11 Circuit Design Format
    MS2 SEQUEST Ms2
    MS3D MilkShape 3D Model Format
    MS7 NI Multisim V7 Circuit Design Format
    MS8 NI Multisim V8 Circuit Design Format
    MS9 NI Multisim V9 Circuit Design Format
    MSA Magic Shadow Archiver Atari Disk Image
    MSB The Bat! Format
    MSC Microsoft Management Console Control Format
    MSCG Microsoft Clip Art Gallery For Mac
    MSCR Rename Master Scrip
    MSCT MOPEKS Script
    MSCX MuseScore Music Score Format
    MSCX, MuseScore Music Score Backup
    MSCZ MuseScore Compressed Music Score Format
    MSCZ, MuseScore Music Score Backup
    MSD Map Service Definition Format
    MSDEV Microsoft Visual C+ Make
    MSDL Manchester Scene Description Language
    MSDM Microsoft Windows
    MSDVD Microsoft Windows DVD Maker Format
    MSE 3D Studio Max Encrypted MAXScript Format
    MSE-INSTALLER Magic Set Editor Installer
    MSF Mozilla Thunderbird Mail Summary Format
    MSG Saved Email Message
    MSGR Microsoft Graph 5
    MSH MASH Microsoft Agent Script Helper Format
    MSHA Microsoft Help Library Help Manifest Format
    MSHC Microsoft Help Container Format
    MSHDB Ministry Scheduler Pro Database
    MSHI Microsoft Help Index Format
    MSHXML Microsoft XML Typedata
    MSI Microsoft Windows Installer Installation Package
    MSIE Microsoft Internet Explorer For Mac HTML
    MSIF MyLabel Designer Deluxe Label Format
    MSIL Microsoft Intermediate Language
    MSJ MicroSurvey CAD Temporary
    MSK Corel PaintShop Photo Pro Mask Image Format
    MSKIN Maxthon Skin
    MSKN MediaMonkey Skin Format
    MSL Miranda IM Smiley Definitions
    MSLZ Archive
    MSM Windows Installer Merge Module
    MSMESSAGESTORE Windows Mail Message Information Database
    MSN Microsoft Windows Network Related Format
    MSO Microsoft Organization Chart Chart Format
    MSOF Microsoft Office For Mac
    MSP Windows Installer Patch Format
    MSPX Microsoft XML-based Web Page
    MSRCINCIDENT Microsoft Windows Remote Assistance Request Format
    MSS Miles Sound System DLS 1 Sound Format
    MSSTYLE Windows XP Unsigned Style
    MSSTYLES Microsoft Windows Resources Themes Luna Format
    MST Windows Installer Transform Script Format
    MSTAT SAM Domain Output
    MSTT Prosa Minispecification
    MSU Microsoft Update Standalone Package Format
    MSV Sony Memory Stick Compressed Voice Files
    MSVC Microsoft Visual C++ Compiler Makefile
    MSW Microsoft Word 5 Document Format
    MSWD Microsoft Word For Mac Document
    MSWK Microsoft Works For Mac
    MSWMM Microsoft Windows Movie Maker Project Format
    MSX Age Of Empires II Saved Game
    MSYM ArchiCAD For MAC Geometric Description Language
    MSZ MediaMonkey Skin
    MS_ Microsoft Windows Winhelp Compressed
    MT2 MadTracker 2 Module Format
    MT9 MT9 Audio Format
    MTA Samsung AllShare Metadata Format
    MTB MediaTracker Database Backup
    MTC MediaTracker Database
    MTD Musicnotes Digital Music Sheet Format
    MTDD MEDITECH Document Definition
    MTE MadTracker Envelope Gile
    MTF Motorola Theme Format
    MTG Making The Grade
    MTH Derive Math Format
    MTHD MOPEKS Method
    MTI MadTracker 2 Instrument Format
    MTIFF Multi-page Tiff
    MTK MPU-401 Trakker
    MTKEY ProDAD Heroglyph License
    MTKT MTK GPS Receiver Data
    MTL OBJ Material Format
    MTM MultiTracker Music Module (MOD) Format
    MTML Meaningful Text Markup Language
    MTN Match! Database
    MTO FastCAM MTO Data
    MTP Minitab Portable Worksheet Format
    MTR RealFight Radio Control
    MTRA MascotCapsule Resource
    MTS AVCHD MPEG-2 Transport Stream Format
    MTS1 MPEG-2 Transport Stream
    MTT Microsoft Messenger Saved Contact Format Format
    MTV MTV Video Format
    MTW Minitab Data Format
    MTX Microsoft Visual Studio Manual Test Text Format
    MTXT MOPEKS Problem
    MTZ Compressed MetaStream Scene Format
    MT_ Encore Compressed
    MU Corel Quattro Pro For DOS Menu Definition Format
    MU3 Myriad Packed Musical Score
    MUC Music Collector Collection Data
    MUD Textease Multi User Database
    MUF Alpha Five Access Control Format
    MUG Hanes T-ShirtMaker Document
    MUI MultiLanguage Windows Resource Format
    MUIMANIFEST Microsoft Windows Multilingual User Interface
    MUI_CCCD5AE0 Hid User Library
    MUL Ultima Online Game
    MULIB Adobe Muse Exported Library
    MULT SAM Alignment Output
    MUM Windows Vista Update Package Format
    MUP Music Publisher Data Format
    MUS Finale Music File Format
    MUS10 Audio
    MUSA Aleph One Music Format
    MUSE Adobe Muse Project Format
    MUSX Min‐U‐Script Xpress Transcript Data
    MUT Integrative Genomics Viewer Mutations List
    MUX TrackMania Music Format
    MUZ MUZ Audio Format
    MV IRIX Command Compressed Movie Format
    MV1 Video
    MV4 Apple QuickTime Video
    MV85 Adobe Director For Mac Movie
    MV93 Adobe Director For Mac Movie
    MV95 Adobe Director For Mac Movie
    MVA Microsoft Setup Archive
    MVB Multimedia Viewer Book Format
    MVC Sony Digital Mavica Photo Image Format
    MVD Movie Edit Pro Video Format
    MVDX MindView MindMap Archive
    MVE Interplay Video Format
    MVEX Muvee AutoProducer Unicode Document Format
    MVF AutoFlix Stop Frame
    MVG ImageMagick Proprietary Vector Graphics Format
    MVI Autodesk AutoCAD Movie Command Format
    MVL Medison 3D Volume Data
    MVM MAGIX PhotoStory On DVD Slideshow
    MVP Movie Edit Pro Video Project Format
    MVR IBM HotMedia Multimedia Format
    MVS MusicMatch Jukebox Visualization Format
    MVT Ultimate Wish Lists Template
    MVV AVS Media Player MPEG Video
    MVW Saber LAN Log
    MVX Multimedia Fusion Movement Extension Format
    MVY MAGIX Video Easy Project Format
    MV_ Magix Movie Edit Pro Movie Backup Format
    MW Maple Worksheet Format
    MW2 MicroWorlds Logo Activity
    MW2D Apple MacWrite
    MW2S MacWrite II Model
    MW4 MechWarrior Game Structure File Archive
    MWAND Apple GarageBand MagicMentor Tepmplate Format
    MWAV Extended WAV
    MWB MySQL Workbench Database Models
    MWC Make Project Creator Input
    MWD Mariner Write Document Format
    MWDP CodeWarrior Debugger
    MWE OpenArchitectureWare Workflow
    MWF MapGuide Format
    MWI Medlin Payroll Software Invoice Layout Information
    MWII MacWrite II Text Document
    MWK MusicWrite Music Score
    MWLIC MoneyWell License Information Format
    MWP Lotus Word Pro 97 Smartmaster Format
    MWPD MacWrite Pro Document
    MWPP MacWrite Pro Document
    MWPR MacWrite Pro
    MWS Maple Spreadsheet Document Format
    MWT MetaStock Stock Analysis Template
    MWX Autodesk MapGuide Author Map Window XML Format
    MX Matlab Common Matrix Routines Format
    MX1 Coucoucircus.org Audio Temporary
    MX2 MasterCook Recipe
    MX3 Mixcraft Project Format
    MX4 Mixcraft 4 Audio Format
    MX5 Mixcraft 5 Audio Format
    MX5TEMPLATE Mixcraft Audio Project Template Format
    MX6 Mixcraft 6 Audio
    MXAD Mandelbrot Explorer All Data Format
    MXADDON Maxthon Addon Format
    MXC ArcView Geocoding Index For Read-write Coverages
    MXC2 MAGIX Music Maker Cache
    MXC3 Magix Photo Manager Thumbnail Cache
    MXCS Mandelbrot Explorer Colour Scheme Format
    MXD ArcGIS Map Document Format
    MXDIC Maxthon Dictionary Format
    MXDL Maxthon Incomplete Download
    MXE Corel Quattro Pro Startup Macro Format
    MXF Material Exchange Format
    MXFD ABBYY Form
    MXFR Mandelbrot Explorer Fractal Region Format
    MXG Miinoto Exchangeable Group Format
    MXI Adobe Dreamweaver Extension Manager Format
    MXIT MXit Data
    MXL Compressed MusicXML Music Notation Format
    MXM MixMeister BPM Calculation Format
    MXMF Mobile XMF Format
    MXML Adobe Flex Interface Component Format
    MXN Miinoto Exchangeable Note Format
    MXP Adobe (Macromedia) Extension Package Format
    MXPRJ Maschine 2.0 Project
    MXS Maxwell Render Scene Definition Format
    MXSD IBM WebSphere Message Definition
    MXSKIN Maxthon Skin Format
    MXT ArcGIS ArcMap Map Template Format
    MXV MAGIX Movie Edit Pro Video Format
    MXZ Maximizer Data
    MY3D My3D Tools Exported
    MYAPP Microsoft Visual Studio Application XML Format
    MYB MYOB Data
    MYCOLORS Stardock MyColors Theme Format
    MYD MySQL Database Data Format
    MYDOCS Send To Format
    MYE MYOB
    MYI MySQL Database Index Format
    MYL MyLogo Maker Image
    MYO MYOB Data
    MYOB MYOB Data
    MYOX MYOB Data
    MYP Warhammer Online: Age Of Reckoning
    MYR Myriad Music Format
    MYS Vineyard Captured Video Format
    MYV Vivaldi Studio Score
    MZ Mozart Compressed
    MZ2 Maze-solver MZ2
    MZB MegaZeux Board
    MZE Maze Creator
    MZF MediaZip Archive
    MZP Autodesk 3D Studio Max MAXScript Zip Package
    MZT MOZART Template
    MZV Viewpoint Media Player ZoomView Titles
    MZZ Microsoft .NET Framework Installation Package Format
    M_P Pro/ENGINEER Temporary