| mscml | Media Server Control Markup Language File |
| mscpc | MaintScape Collection Data |
| mscr | CuteFTP Script |
| mscx | mSecure Backup |
| msd | Macro eXpert Script |
| msd | Map Service Definition |
| msd | Scream MiniSEED Data |
| msdl | Manchester Scene Description Language Data |
| mse-export-template | Magic Set Editor Export Template |
| mse-game | Magic Set Editor Game Data |
| mse-include | Magic Set Editor Include Data |
| mse-installer | Magic Set Editor Installer |
| mse-locale | Magic Set Editor Translation Data |
| mse-set | Magic Set Editor Package |
| mse-style | Magic Set Editor Stylesheet Data |
| mse-symbol | Magic Set Editor Symbol Data |
| msecure | mSecure Data |
| mseed | MiniSEED Data |
| mseq | DNASTAR Lasergene Multi-Seq Data |
| msf | Altera Mask Settings File |
| msf | Blue Card Manager Merit Badge Mastersheet |
| msf | GCG Multiple Sequence Data |
| msf | Miranda IM Skin |
| msf | Mozilla Mail Folder Summary Data |
| msg | OS/2 Warp Help Message |
| msg | SmartWare Intro Display Data |
| msg | SOBEK Communications Data |
| msg5 | Microsoft Graph 5 Data |
| msgr | Microsoft Graph 5 Data |
| msgstore | WhatsApp Saved Chat History |
| msh | ANSYS Workbench Mesh Data |
| msh | MASH Microsoft Agent Script Helper Data |
| msh | Orbiter 3D Mesh Data |
| msh1xml | Windows PowerShell XML Data |
| msh2xml | Windows PowerShell XML Data |
