| Abbreviation | Definition |
|---|---|
| MRS | WordPerfect Macro Resource file |
| MS | Formatted manual page with Microsoft macros |
| MS | Microsoft antivirus report (MSAV) |
| MS | Modula-3 Intermediate assembly file |
| MS | Worksheet (Maple) |
| MSC | Microsoft C makefile |
| MSDL | Manchester Scene Description Language |
| MSG | Digitized voice file (ZVoice) |
| MSG | Message(s) |
| MSI | Medical Services Insurance |
| MSN | Microsoft Network document |
| MSP | Microsoft Paint format - Bitmap graphics |
| MSP | Microsoft Patch |
| MSPX | Microsoft XML-based Web Page |
| MSS | Manuscript text file (Perfect Writer - Scribble - MINCE - Jove) |
| MST | Microsoft Test Document |
| MST | Microsoft Windows SDK Setup script |
| MST | Prosa MiniSpecification file |
| MSTH | MicroSoft THesaurus |
| MSU | Microsoft Standalone Update |