| mpsy | CodeWarrior Debugger Symbols Data |
| mps_ | MPW Shell Data |
| mpx | Alpha Five Temporary Index |
| mpx | Visual FoxPro Compiled Menu Program |
| mq4 | MetaQuotes Language 4 Source Code |
| mq5 | MetaQuotes Language 5 Source Code |
| mqh | MetaTrader MetaQuotes Language 4 Header |
| mql | MetaTrader MetaQuotes Language 4 File |
| mql4 | MetaTrader MetaQuotes Language 4 File |
| mql5 | MetaTrader MetaQuotes Language 5 File |
| mqs | IBM MDWorkbench MQL Script |
| mqt | MetaTrader MetaQuotes Language 4 Template |
| msb | Oracle Binary Message File |
| msct | MOPEKS Script File |
| msdev | Visual Studio Makefile |
| msg | Uniface Message Texts Data |
| msh | MaxL Shell Script |
| msh | Microsoft Shell Script |
| msh1 | Microsoft Shell Script |
| msh2 | Microsoft Shell Script |
| msha | Microsoft Help Asset.File |
| mshc | Microsoft Help Container. |
| mshi | Microsoft Help Index.File |
| mshxml | Microsoft Shell Types File |
| msil | Microsoft Intermediate Language Data |
| msl | Mapping Specification Language Data |
| msl | ProWorx NXT MSL Loadable |
| mspx | Microsoft Presentation Framework Page |
| mstx | Windows Template Studio Template Data |
| msvc | Visual Studio C++ Compiler Makefile |
