| mml | Adobe FrameMaker Document Properties Data |
| mml | Media Catalog MML File |
| mmlic | Mobile Master License Data |
| mmm | 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 |
| mmo | RapidFile Memo Data |
| mmod | MacroModel Molecular Mechanics Data |
| mmp | CoCo Systems VisiMap Data |
| mmp | Metamath Proof Worksheet |
| mmp | MixMeister Studio Playlist |
| mmp | Symbian Project Specification Data |
| mmr | Inertial Explorer Mounting Data |
| mmr | Sybase PowerDesigner Multimodel Report |
| mmt | CoCo Systems VisiMap Template |
| mmt | EGSEING Memory Dump |
| mmt | Nimbus 7 SAMS MMRVT Data |
| mmu | myPM Merge Data |
| mmw | AceMoney Data |
| mmw | Microsoft Office Clip Organizer Catalog |
| mmysyscache | Milennial Media Ad Cache |
| mmz | Musicmatch Jukebox Theme Data |
| mn1 | Microsoft Money v1 Data |
| mn4 | Microsoft Money 95 Data |
| mn5 | Microsoft Money 97 Data |
| mn6 | Microsoft Money 98 Data |
| mn7 | Microsoft Money 99 Data |
| mn8 | Microsoft Money 8 Data |
| mn9 | Microsoft Money 2001 Data |
| mnc | Autodesk AutoCAD Compiled Menu |
| mnd | Autodesk AutoCAD Menu Compiler Data |
| mnd | Fractal Forge v2 Fractal Parameters |
