| Abbreviation | Definition |
|---|---|
| MRTP | Multi-Role Tactical Plot |
| MRTT | Modular Record Traffic Terminal |
| MRU | machine records unit |
| MRU | Minimum Replacement Unit |
| MRU | Much Regret Unable to attend |
| MRV | Medium Reconnaissance Vehicle |
| MRV | Missile Reentry Vehicle |
| MS | Market Survey |
| MS | Master Seaman |
| MS | Mess Specialist |
| MS | Message Switch Ms Millisecond |
| MS | Microsoft Corporation |
| MS | MileStone |
| MS | Military Science |
| MS | Military Security. |
| MS | Military Standard |
| MS | Military Stone |
| MS | Mil-Spec |
| MS | Mobile Suit |
| MS | Mobilization Station |