| Abbreviation | Definition |
|---|---|
| EPS | Eumetsat Polar System |
| EPS | Evaluation Planning System |
| EPS | Experimental Power Supply |
| EPS | External Pressure Sensor |
| EPSP | Experiment Power Switching Panel |
| EPSS | Electrical Power Subsystem |
| EPT | Emergency Procedure Trainer |
| EPT | Ethylene Propylene Terpolymer |
| EPTU | Events Per Time Unit |
| EPV | Extended Precision Vector |
| EPWG | Environmental Projects Working Group |
| EQ | EQuivalent |
| EQE | Event Queue Element |
| EQL | EQuaL |
| EQSR | Engineering Qualification Status Review |
| EQUIP | EQUIPment |
| EQUIV | EQUIValent |
| ER | Eastern Range |
| ER | Eva Rescue |
| ER | Explanation Report |