| Abbreviation | Definition |
|---|---|
| MMC | Matroska Multimedia Container |
| MMD | Memory Makin Divas |
| MMF | Mail Message File ( MicroSoft Mail) |
| MMM | MultiMedia Movie format |
| MMO | Memo writer file (RapidFile) |
| MMP | EPOC Makmake Makefile Project |
| MMP | Output video format from Bravado board |
| MMTF | Macro Molecular Transmission Format |
| MND | Menu source (AutoCAD Menu Compiler) |
| MNG | Bitmap graphics (Multiple-image Network Graphics) |
| MNG | Map (DeLorme Map'n'Go) |
| MNT | Additional (FPT) menu description file (FoxPro) |
| MNU | Advanced macro (HP NewWave) |
| MNU | Menu (many) |
| MNX | Compiled menu (AutoCAD) |
| MNX | Main (DBF) menu description file (FoxPro) |
| MNY | Account book (MS Money) |
| MO | Modula-3 Object file |
| MOB | PEN Windows Device definition |
| MOBI | Mobile |