| mwl | Mighty Draw Windows Library |
| mwp | STEP 7 MicroWIN Program |
| mws | Medlin Payroll Software Statement Layout Data |
| mwsp | ScanTango Plug-in |
| mwv | MediaWorks Data |
| mwx | MicroWorlds EX Data |
| Minitab 19 Worksheet |
| mx | Mathematica Serialized Package |
| MATLAB Common Matrix Routines Data |
| MX Designer Remote Control Data |
| mx2 | MasterCook Recipe Data |
| 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 |
| mxdl | Maxthon Browser Incomplete Download File |
| mxe | Corel Quattro Pro Startup Macro |
| Macro Express Playable Macro |
| mxf | MX Editor Remote Control Data |
| mxfassoc | Adobe Premiere MXF Association Data |
| mxfd | Abbyy eFormFiller Form File |
| mxfindex | Canon EOS C300 Video Metadata |
| mxfr | Mandelbrot Explorer Fractal Region Data |
| mxfx | NI Maschine Effects Plug-in Presets Data |
| mxg | Miinoto Exchangeable Group |
| MX Editor MX-900 Data |
| mxgrp | NI Maschine Group Data |
| mxi | Proteus Data |
| mxinst | NI Maschine Instrument Plug-in Presets Data |
| mxit | MXit Data |
| mxl | IBM Sterling B2B Integrator XML Map Source |
| Packrat 5.0 Support Data |
| mxliff | Memsource XLIFF Data |
| mxm | Maxwell Render Material |
| Microsoft Project Workgroup Message |
| MixMeister Studio BPM Calculation Data |
| NI Multisim MXML Data |
| mxml | Mercury Motif Data |
| NI Multisim MXML Data |
| mxn | MultiNote Exchangeable Notes |
| mxq | SA Chess MXQ Data |
| mxr | MatrixREDUCE 2.0 PSAM XML Format Data |
| mxrw | Mandelbrot Explorer RAW Data |
| mxs | ArcVIEW Geocode ODB Index |
| Carlson 2016 Multiple Cross Sections Data |
| Corel Painter Mixer Pad Data |
| mxsd | IBM WebSphere Message Definition Data |
| mxskin | Maxthon Browser Skin |
| mxt | ArcMAP Template |
| Fortran 5 Data File |
| mxz | Maximizer CRM Data |
| my3d | Hasbro My3D File |
| myb | MYOB AccountRight Company Data |
| mybible | MySword Bible Database |
| mycolors | Stardock MyColors Theme |
| myd | Everfine LEDspec Photomoetric Results Data |
| MySQL MyISAM Table Data |
| mye | MYOB AccountEdge Exported Data |
| myfourwalls | MyFourWalls Room Model |
| 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 |
| mzc | MOZART Chord Dictionary |
| mzd | Mozy Restore Definition Data |
| mze | Maze Creator Maze Data |
| mzf | Sharp MZ-series Emulator MZF Image |
| mzml | RAW Mass Spectrometry Data |
| mzq | Sharp MZ-series Emulator Quick Disk Data |
| mzs | Sharp MZ-series Emulator MZS Data |
