| Abbreviation | Definition |
|---|---|
| EM | EMergency |
| EM | Energy Maneuverability |
| EM | Engineering Model |
| EM | Exception Monitor |
| EM | Expect Maximum |
| EM | External Module |
| EMA | ElectroMagnetic Analysis |
| EMC | Engine Mounted Computer |
| EMCC | Emergency Mission Control Center |
| EMCD | Electro-Mechanical Control Diagram |
| EMCI | Engineering Model Configuration Inspection |
| EMD | Entry Monitor Display |
| EME | Earth Moon Earth |
| EMEC | ElectroMagnetic Eddy Current |
| EMEC | ElectroMagnetic Effects Capability |
| EMER | EMERgency |
| EMES | Electrical, Mechanical, and Environmental Systems |
| EMF | ElectroMotive Force |
| EMG | ElectroMyoGraphy |
| EMH | ElectroMagnetic Hazard |