M1A-MPEG-1-audiostream
M1C-IBM-Voice-Type-languages-Newuser-file
M1I-IBM-Voice-Type-Language-Newuser-File
M1PG-iFinish-Video-Clip
M1PG-iFinish-Video-Clip-Media-100-Inc
M1S-MPEG-1-systemstream
M1S-MPEG-Media-File
M1U-Pocket-TV-PDA-file
M1V-MPEG-related-file-MIME-type-mpeg
M21-AXMEDIS-MPEG-21-File
M21-AXMEDIS-MPEG-21-File-AxMediaTech-S-R-L
M21-MPEG-21-File
M22-Farallon-s-MacRecorder-Format-Sampling-Rate-22k
M29-Turbo-Smetchik-Data-Basis
M2A-Apple-MPEG-1-2-audio
M2A-MPEG-1-Layer-2-Audio-File
M2A-MPEG-2-Audio
M2C-IBM-Voice-Type-languages-Newuser-file
M2F-Maxthon-filter-package
M2I-IBM-Voice-Type-languages-Newuser-file
M2L-Maxthon-language-package
M2-Modula-2-Language-Source
M2-Modula-2-language-source-file
M2O-Modula-Fitted-Modula2-file
M2P-Canopus-MPEG-2-video-file
M2S-Maxthon-2-Browser-Skin-File
M2S-Maxthon-skin-installation-package
M2S-MPEG-2-audio-video-file
M2T-HDV-Video-File
M2T-MPEG-movie-file
M2TS-Blu-ray-BDAV-MPEG-2-Transport-Stream-Blu-ray-Disc-Association
M2TS-MPEG-2-stream-Blu-Ray
M2TS-Sony-high-definition-video-file
M2V-MPEG-2-IPB-videostream
M2V-MPEG-2-Video-Only-File
M2-World-of-Warcraft-Model-Object-File
M32-Dr-T-MIDI-File
M3A-MPEG-3-audio
M3A-MPEG-Archive-Enhanced-M3U-Playlist-File
M3C-IBM-Voice-Type-languages-Newuser-file
M3D-3D-animation-Corel-Motion
M-3D-GameStudio-backup-map
M3G-Mobile-3D-Graphic
M3G-Mobile-3D-Graphics-Header
M3G-Nokia-Phone-Screen-Saver-Nokia
M3I-IBM-Voice-Type-languages-Newuser-file
M3K-Interactive-Digital-Content-File
M3S-Myst-III-Exile-Saved-Game-Cyan-Worlds-Inc
M3-source-code-file-Modula-3
M3U8-Audio-Playlist-UTF-8-Header
TechTarget file types