| mabk | Lenovo MOTO Smart Assistant Backup Data |
| maff | Mozilla Archive Format File |
| mar | Mozilla Firefox Archive |
| maz | Autodesk 3D Studio Max Archived Network Rendering Job |
| mb2 | McMyAdmin 2 Backup Archive |
| mbkp | Memeo Instant Backup Archive |
| mbz | Moodle Backup Data |
| mc$ | Magic Cap Xchange Package |
| mcaddon | Minecraft Addon Package |
| mcb | McMyAdmin Backup Archive |
| mcp | MSN Content Plus Installation Archive |
| mcpack | Minecraft Resource Pack |
| md | MDCD Compressed Archive |
| mdbackup | iPhone Data Backup |
| mdc | MedDC Mail Pouch Data |
| mddata | iPhone Backup Archive |
| meo | MEO Encrypted Archive |
| mfp | MobileFrame Package |
| mig | Windows USMT Backup Archive |
| mint | Linux Mint Installer |
| mkz | PokerOffice Database Backup |
| mlappinstall | MATLAB App Installer Package |
| mlpkginstall | MATLAB Support Package |
| mltbx | MATLAB Toolbox Package |
| mmbak | Money Manager Backup Archive |
| mmip | MediaMonkey Installation Package |
| mou | WinMount Archive |
| mozlz4 | Mozilla Firefox Portable Data |
| mp | SCOM Management Pack |
| mpb | SCOM Management Pack Bundle |
| 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 |
| mrpack | Modrinth Modpack Archive |
| mrsql | Macrium Reflect SQL Backup |
| msi | Microsoft Windows Installer Package |
| msix | MSIX Package |
| msixbundle | MSIX Bundle Package |
| msixupload | MSIX Upload Bundle Package |
| msm | Microsoft Windows Merge Module |
| msp | Autodesk 3D Studio MAX MAXScript Page Data |
| 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 |
| mzp | Autodesk 3D Studio MAX Zipped MAXScript Package |
| mzz | Microsoft .NET Download Package |
| n000 | Genie Backup Manager Split Backup Archive |
| nai | WinINSTALL LE NAI Package |
| narc | Nintendo DS Archive |
| nba | Nero BackItUp Backup Archive |
| nbf | NTI Backup Now Archive |
| nbp | ArcSoft Totalmedia Backup Archive |
| nbz | ArcSoft Totalmedia Backup Archive |
| nc | MCrypt Encrypted Archive |
| nca | Switch Nintendo Content Archive |
| nfp | Nokia Flash Package |
| nhn | ijji REACTOR Game Package |
| novabackup | Nova Launcher Home Screen Backup |
| npac | NeoEngine Resource Package |
| npf | NTI Backup Now Partition File |
| Samsung PC Studio Phonebook Backup |
| nsarc | Neuro-MEP.NET Software Archive |
| nsk | NaShrinK Compressed Archive |
| ntj | Junction Box Backup |
| nuget | NuGet Package |
| nvz | Novelty Content Package |
| nxa | NanoTrader Nano Export Archive |
| nz | NanoZip Compressed Archive |
| oap | Bada Signed Installation Package |
| OutSystems Application Package |
| oar | OpenSimulator Archive |
| oarc | Optix Archive Bundle |
