| Abbreviation | Definition |
|---|---|
| EM | Executive Manager |
| EM1 | Electricians Mate First Class |
| EM1C | Electricians Mate First Class |
| EM2 | Electricians Mate Second Class |
| EM2C | Electricians Mate Second Class |
| EM3 | Electricians Mate Third Class |
| EM3C | Electricians Mate Third Class |
| EMA | arliest Missile Away |
| EMA | Earliest Missile Away |
| Electronic Mail | |
| EMALL | Electronic Mall |
| E-MAP | Electronic Map |
| EMAR | European Military Airworthiness Requirements |
| EMAS | Exercise Message Analysis System |
| EMATT | Enhanced Multi-Mission Advanced Tactical Terminal |
| EMB | Embedded |
| EMB | Engine Mount Bracket |
| EMB | Engineering Management Board |
| EMC | Chief Electricians Mate |
| EMC | ElectroMagnetic Compatibility |