| Abbreviation | Definition |
|---|---|
| MSS | Multispectral Scanner System |
| MSSL | Mullard Space Science Laboratory, UK |
| MSSS | Maui Space Surveillance Site |
| MSSTA | MultiSpectra Solar Telescope Array |
| MST | Measurement Status Table |
| MST | Mercury System Test |
| MST | Missile System Test |
| MST | Mission Sequence Test |
| MST | Mission Support Team |
| MST | Mobile Service Tower |
| MST | Module Service Tool |
| MST | Module Systems Trainer |
| MST | Mountain Standard Time |
| MSTF | Mission Support Training Facility |
| MSTR | MaSTeR |
| MSU | Mass Storage Unit |
| MSU | Measuring Stimuli Units |
| MSV | Monitored Sine Vibration |
| MSVP | Master Shuttle Verification Plan |
| MSW | MicroSWitch |