| moef | Motion Effect Template |
| mogg | MedCalc MOGG Data |
| mogrt | Adobe Premiere Motion Graphics Template |
| mohoaction | Moho Action Data |
| mohobrush | Moho Brush Data |
| mohoexport | Moho Export Profile Data |
| mohostyle | Moho Style Data |
| moi | JVC Everio Video Information Data |
| mojito | LimeWire Kademlia Data |
| mol | Easy Palette Object Library |
| MDL Molfile Data |
| Music Module List |
| mol2 | Tripos Mol2 Format File |
| molo | Motion Object |
| mologiq | HTC EVO 3D Data |
| mon | Mozilla Firefox Bookmark Backup Data |
| Steinberg WaveLab Audio Montage |
| mon2 | UltraSite Graphical Status Data |
| monet | Adobe Mocha for After Effects Monet Data |
| moneywell | MoneyWell Account Data |
| mongodb | MongoDB Database |
| mono | Monolith Munged Encoded Data |
| monte | CRiSP Monte Carlo Method Data |
| mood | Amarok Moodbar Data |
| mop | MOPAC Input Format Data |
| mopcrt | MOPAC Cartesian Data |
| mopint | MOPAC Internal Data |
| mopout | MOPAC Chemical Output Data |
| mopp | Havok Engine MOPP Data |
| mopt | Transformation Extender Map Source Options Data |
| mor | Poser 3D Morph Target |
| morg | Morg Data |
| mos | Dymola Simulation Data |
| ENVI Mosaic Data |
| MACAOS Compressed Transmission Data |
| mot | Animation Master Motion Data |
| Lightwave 3D Motion Data |
| 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 |
| Autodesk Maya ASCII Motion Data |
| moveraddin | Mover Add-in |
| moverbackup | Mover Backup Data |
| moverdb | Mover Database |
| moverreg | Mover Registration Data |
| movie | Adobe Soundbooth Movie |
| movpkg | Apple Music Downloaded Package |
| 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 |
| Microsoft Multiplan Data |
| 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 |
| mpa | Mail.dat Postage Account File |
| Palm OS Memo Data |
| mpack | Mpack Encoded MIME Message |
| mpb | Maintenance Parts Bin Database |
| Music Publisher Backup File |
| My Phone Explorer Data |
| MyPhoneExplorer Backup |
| mpc | ImageMagick Persistent Image Cache |
| Magick Persistent Image Metadata |
| Microsoft Project Calendar Data |
| mpcatalog | Phase One Media Pro Catalog |
| mpcb | ReliaSoft MPC Data |
| mpcd | MPViewer Data |
