| mfp | MobileFrame Package |
| mig | Windows USMT Backup Archive |
| mint | Linux Mint Installer |
| mkz | PokerOffice Database Backup |
| mltbx | MATLAB Toolbox Package |
| mmbak | Money Manager Backup Archive |
| mmip | MediaMonkey Installation Package |
| mou | WinMount Archive |
| mozlz4 | Mozilla Firefox Portable Data |
| mpkg | Mac OS X Metapackage |
| mplumpack | Luminar Custom Presets Package |
| mpzip | NI Multisim Package |
| mqxlz | memoQ Compressed XLIFF Archive |
| mrback | Macrium Reflect Backup Data |
| mrbak | Macrium Reflect File and Folder Backup |
| mrex | Macrium Reflect Exchange Backup |
| mrimg | Macrium Reflect Disk Image |
| mrsql | Macrium Reflect SQL Backup |
| msi | Microsoft Windows Installer Package |
| msix | MSIX Package |
| msixbundle | MSIX Bundle Package |
| msm | Microsoft Windows Merge Module |
| msp | Microsoft Windows Installer Patch |
| msu | Microsoft Windows Vista Update Package |
| mtz | Maltego Archive |
| mva | Matrox Setup Program Archive |
| myc | Simply Safe Backup Archive |
| mzf | MediaZip Compressed Archive |
| mzz | Microsoft .NET Download Package |
| n000 | Genie Backup Manager Split Backup Archive |