| Abbreviation | Definition |
|---|---|
| MMCL | Master Measurement and Control List |
| MMDB | Mass Memory Data Base |
| MMDB | Master Measurement Data Base |
| MMDF | Mission Model Data File |
| MMES | MSFC (Marshall Space Flight Center) Mated Element Systems |
| MMES | MSFC Mated Element Systems |
| MMH | Maintenance Man-Hour |
| MMH | MonoMethyl Hydrazine |
| MML | Master Measurement(s) List |
| MML | Master Measurements List |
| MMLS | Model-Modes-Loads-Stresses |
| M-M-L-S | Model-Modes-Loads-Stresses |
| MMMS | Multi-Mission Management System |
| MMOD | MicroMeteoroid and Orbital Debris |
| MMOS | Multimode Optical Sensor |
| MMOS | Multi-Mode Optical Sensor |
| MMP | Mars Millennium Project 2030 |
| MMPSE | Multiuse Mission Payload Support Equipment |
| MMS | Magnetospheric MultiScale |
| MMS | Mission Modular Spacecraft |