| morg | Morg Data |
| mos | Dymola Simulation Data |
| mos | ENVI Mosaic Data |
| mos | MACAOS Compressed Transmission Data |
| mot | Animation Master Motion Data |
| mot | Lightwave 3D Motion Data |
| mot | MarcEdit Template |
| moti | Motion Title Template |
| motn | Apple Motion Data |
| motor | Adobe Mocha for After Effects Motor Data |
| motr | Motion Transition Template |
| mov | Autodesk AutoFlix Movie Data |
| mov | Autodesk Maya ASCII Motion Data |
| mow | OvenWATCH Workbook |
| mox | ExtendSim Simulation Model |
| moxel | Adobe Mocha for After Effects Moxel Data |
| moz | Netscape Navigator Temporary File |
| moz-backup | Mozilla Firefox Upgrade Data |
| moz-delete | Mozilla Firefox Upgrade Data |
| moz-upgrade | Mozilla Firefox Upgrade Data |
| mozeml | Thunderbird Spotlight Searchable Email |
| mozmsgs | Thunderbird Mail Folder |
| mp | MatrixPlot Data |
| mp | Microsoft Multiplan Data |
| mp | Race Studio 2 Map File |
| mp+ | Incite Media Assistant File |
| mp0 | Ericsson GPEH Session Data |
| mp21 | AXMEDIS MPEG21 Data |
| mp5 | Maple Data |
| mp6 | CS225 MP6 Huffman Encoding Text Data |
