| Abbreviation | Definition |
|---|---|
| MTW | Maximum Taxi Weight |
| MU | Master Unit |
| MU | Mobile Unit |
| MU | Mockup |
| MUA | Material(s) Usage Agreement |
| MUA | Maximum Usable Altitude |
| MUE | Multi-User Equipment |
| MUF | Maximum Usable Frequency |
| MULE | Mobile Utility Lunar Excavator |
| MULE | Multi-Use Lightweight Equipment |
| MULT | Multiple |
| MULT | Multiply |
| MUM | Mass Memory Unit Manager |
| MUMS | Multiple Use Marc System |
| MUR | Manpower Utilization Report |
| MUSAT | Canadian Government Satellite |
| MUSS | Module Utility Support Structure |
| MUV | Mid- Ultra- Violet light range |
| MUV | Mission Utility Vehicle |
| MUX | Multiplex, Multiplexor |