| Abbreviation | Definition |
|---|---|
| MSW | MicroSoft Word Text document |
| MSX | MSX Compressed CP/M file archive |
| MT | MacIntosh Truetype font |
| MTH | Math file (Derive) |
| MTL | Master Textbook List |
| MTL | Wavefront |
| MTM | MultiTracker Module Music file |
| MTV | MTV RayTracer Bitmap graphics (24bit) |
| MTW | Data file (Minitab) |
| MU | Menu (Quattro Pro) |
| MUF | Alpha Software, Inc., Alpha Five Temporary Access Control File |
| MUS | MusicTime - Doom Sound file |
| MVB | Data (Microsoft Multimedia Viewer) |
| MVF | Stop frame file (AutoCAD AutoFlix) |
| MVI | Movie command file (AutoCAD AutoFlix) |
| MVP | MediaView Project |
| MVW | Log file (Saber LAN) |
| MW | MacWrite II Text document |
| MWF | ProMotion Animation file |
| MWII | MacWrite II Text document |