| myi | MySQL MyISAM Table Index Data |
| mylic | MySpeed License Key |
| mym | Mymenuify Theme Data |
| mynotesbackup | Keep My Notes Backup Data |
| myo | MYOB AccountRight Company Data |
| myob | MYOB AccountRight Company Data |
| myox | MYOB AccountRight 2011 Company Data |
| mysql | SQL Script |
| mysqli | MySQL Native Driver for PHP Data |
| mz2 | Maze-Solver Data |
| mz5 | Poser 5 Binary Material Data |
| mzd | Mozy Restore Definition Data |
| mze | Maze Creator Maze Data |
| mzxml | SPC mzXML Data |
| m_p | Pro/ENGINEER Temporary Data |
| n2g | SATURN Suite Node to Group Data |
| n2p | Nebula v2 Program File |
| n2s | Nebula v2 Skin |
| n2u | Baan ERP Native to Unicode Mapping Data |
| n2v | Nebula v2 Vector File |
| n3d | Nuclear Studio 3D Scene |
| n3s | Green Kenue Network Data |
| n43 | Norma43 Data File |
| n4d | Plancal Nova Data |
| n52 | Nostromo n52 Gamepad Configuration Data |
| n64 | N64 ROM Image |
| n80 | PC8001 Rom Image |
| n88 | Apple iOS Kernel Cache |
| n90 | Apple iOS Kernel Cache |
| na2 | Netscape Communicator Address Book |
| na2 | SeaMonkey Address Book Data |
| naa | MSNBC News Alert Advertising Data |
| nab | Novell Addressbook |
| nac | 3COM Router Firmware |
| nad | Neighbourhood Algorithm Direct Access File |
