| Abbreviation | Definition |
|---|---|
| EPDU | Electrical Power Distribution Unit |
| EPE | Energetic Particle Explorer |
| EPE | Estimated Positioning Error |
| EPG | Electrical Power Generator |
| EPHIN | Electron Proton Helium Instrument |
| EPICS | Experimental Physics And Instrument Control System |
| EPL | Electrical Power Level |
| EPL | Electronic, Electrical, and Electromechanical Parts List |
| EPL | Emergency Power Level |
| EPM | European Physiology Module |
| EPMS | Engineering Performance Management System |
| EPO | Element Project Office |
| EPOC | External Payload Operations Center |
| EPOCh | Extrasolar Planet Observation and Characterization |
| EPP | Environmental Protection Plan |
| EPPS | Electrical Power Sequential System |
| EPR | Engine Pressure Ratio |
| EPRN | Emergency Program Release Notice |
| EPROM | Erasable Programmable Read Only Memory |
| EPS | Electrical Power System |