| Abbreviation | Definition |
|---|---|
| MMC | Man Machine Code |
| MOF | Macro Operation Finish |
| MOV | Move |
| MOVS | Move String |
| MOVSB | Move String Byte |
| MOVSD | Move String Doubleword |
| MOVSW | Move String Word |
| MOVSX | Move With Sign-Extend |
| MOVZX | Move With Zero-Extend |
| MP | Make Parameter |
| MP | Multi Precision |
| MPA | Member Provincial Assembly |
| MPA | Motorizes Polygon Assembly |
| MPS | Move Pen Somewhere |
| MR | Magic Return |
| MR | Memory Read |
| MRS | Mode Register Setting |
| MRWA | Muskegon River Watershed Assembly |
| MS | Missing Sense |
| MSP | Mistake Sign for Parity |