| mlog | Microsoft Outlook Message Log |
| mlp | mAirList Desktop Playlist |
| Martus Language Pack |
| mlr | UGS Teamcenter Visualization Data |
| mls | mAirList Script |
| Skype Localization Data |
| mlsxml | Skype XML Data |
| mlt | Forecast Pro Multivariate Forecast Data |
| mAirList Desktop Template |
| mlw | MainLog Data |
| mlx | MATLAB Live Script |
| Meshlab Filter Script |
| mlz | MLZ Data |
| ml_ | MainLog Compressed Data |
| mm | FreeMind MindMap |
| Kodak EasyShare Thumbnail Cache |
| Matrix Market File |
| Metamath ASCII Database |
| NeXtMidas Macro |
| mm3 | MM3 Chemical Modeller Data |
| Mortgage Minder v3 Data File |
| mm3d | Misfit Model 3D Model |
| mm5 | Makromat Macroeconomic Model Data |
| mm6 | Money Manager 6 Data |
| mmads | MMADS Chemical Modeller Input Data |
| mman | Emailer MMAN Data |
| mmap | MindManager Map File |
| mmas | MindManager Theme |
| mmat | MindManager Map Template |
| mmb | Mobile Master Backup |
| Money Manager EX Data |
| Multimedia Builder Data |
| Tecplot Data |
| mmc | MicroCase Boundary Data |
| Microsoft ClipArt Gallery Catalog |
| Transformation Extender Windows Compiled Map |
| mmcif | mmCIF Data |
| mmcollection | Mail Manager Collection Data |
| mmd | Cumulate Draw MMD Data |
| MacroModel Chemical Modeller Output |
| MacroModel Molecular Mechanics Data |
| mAirList Metadata |
| Mangodata Database |
| Media Processing Server Audio Data |
| Summit Membership Manager Database |
| mmd0 | Foobar2000 Data |
| mmdb | MaxMind GeoIP2 Database |
| Molecular Modeling Database |
| mmdl | Sapphire Structure Model Data |
| mmdr | Adobe Director MMDR Data |
| mme | MIME Encoded Data |
| Transformation Extender Map Build Analysis Results Data |
| mmes | Mastersizer 3000 Data |
| mmf | Meal-Master Recipe File |
| Microsoft Mail Message Format Data |
| mmg | Model Master 3 Axis Flat Data |
| mmi | Media Processing Server Index File |
| Memory-Map Navigator Place Name Index |
| mmjb | Musicmatch Jukebox Data |
| mmjb_mime | Musicmatch Jukebox MIME Data |
| mmjs | Adobe Dreamweaver Javascript |
| mml | Adobe FrameMaker Document Properties Data |
| Media Catalog MML File |
| Microsoft Clip Organizer Data |
| MOLMOL Molecule Description |
| MyMailList and AddressBook Data |
| mmld | EdGCM MMLD Data |
| mmlic | Mobile Master License Data |
| mmlicinst | Memory-Map Navigator License Data |
| mmm | Adobe Type Manager Multiple-master Font Metrics Data |
| Money Manager Data |
| Music Maker Audio Arrangement Data |
| mmmacro | Mini Mouse Macro Data |
| mmmp | MindManager Map Part |
| mmms | MindManager Map Marker List |
| mmn | Memory-Map Navigator Data |
| mmo | Memory-Map Overlay File |
| RapidFile Memo Data |
| mmod | MacroModel Molecular Mechanics Data |
| mmp | CoCo Systems VisiMap Data |
