| mtt | MetadataTouch Template |
| mtt | FastCAM MTO Data Template |
| mtu | Match! User Database |
| mtw | Minitab Worksheet |
| mub | ExtractNow Data |
| muc | Music Collector Collection Data |
| mud | Textease Database CT Multi-user Database |
| mudp | Active Safety System Internal Log |
| mulib | Adobe Muse Widget Library |
| musx | Minâ€Uâ€Script Xpress Data File |
| mvf | Autodesk AutoFlix Animation Data |
| mvi | Autodesk AutoCAD AutoFlix Movie Command File |
| mvl | Medison Ultrasound 3D Volume Data |
| mvm | MAGIX PhotoStory Slideshow |
| mvw | McAfee Saber LAN Log |
| mwand | GarageBand Magic Mentor Template |
| mwb | MySQL Workbench Model |
| mwc | AIBO Middleware Catalog File |
| mwf | SDL Trados Memory Word Find File |
| mwi | Medlin Payroll Software Layout Data |
| mwl | Mighty Draw Windows Library |
| mwv | MediaWorks Data |
| mx | Mathematica Serialized Package |
| mxad | Mandelbrot Explorer All Data |
| mxaddon | Maxthon Browser Add-On |
| mxc | ArcVIEW Geocode Coverage ODB Index |
| mxc2 | MAGIX Thumbnail Cache |
| mxcs | Mandelbrot Explorer Color Scheme |
| mxd | ArcMAP Document |
| mxdic | Maxthon Browser Dictionary |
