| Abbreviation | Definition |
|---|---|
| EAPU | External Auxiliary Power Unit |
| EARA | Egypt Amateur Radio Assembly |
| EARFCN | Evolved Absolute Radio Frequency Channel Number |
| EARS | Edmond Amateur Radio Society |
| EARS | Escondido Amateur Radio Society |
| ELF | Extremely Low Frequency (30 - 300 Hz) |
| EMC | ElectroMagnetic Compatibility |
| EMI | ElectroMagnetic Interference |
| EMI | Electro-Magnetic Interference |
| EPARS | East Pasco Amateur Radio Society |
| ERAU | Estonian Radio Amateurs Union |
| ERDS | Emergency Radio Data System |
| ERP | Effective Radiated Power |
| FAR | Foundation for Amateur Radio |
| FARS | Foothills Amateur Radio Society |
| FARTS | Fremont Amateur Radio Transmitter Society |
| FBR | Fine Business Radio |
| FF | Fixed Frequency |
| FFARA | Five Flags Amateur Radio Association |
| FFR | Fitted For Radio |