| EARSeL | European Association of Remote Sensing Laboratories |
| EAS | European Astronomical Society |
| EBA | European Broadcasting Agreement |
| EBA | European Broadcasting Area |
| EBU | European Broadcasting Union |
| EC | European Commission |
| ECA | European Common Allocation (CEPT) |
| ECC | Electronics Communications Committee (CEPT) |
| ECCA | European Cable Communications Association |
| ECO | European Communications Office (CEPT) |
| ECP | European Common Proposal (CEPT) |
| ECTRA | European Committee for Telecommunications Regulatory Affairs |
| EDRS | European Data Relay Satellite (ESA) |
| EDRSS | European Data Relay Satellite System |
| EEA | European Economic Area |
| EES | Earth Exploration Satellite |
| EESS | Earth Exploration Satellite Service |
| EFTA | European Free Trade Association |
| EGC | Enhanced Group Call |
| E-GSM | Extended GSM |
| EHF | Frequency range 3 to 30 GHz |
| EICTA | European Information and Communication Technology Association |
| EIN | Equivalent Input Noise |
| EIRP | Effective Isotropic Radiated Power |
| EISCAT | European Incoherent Scatter Scientific Association |
| ELF | Extremely Low Frequency (< 3 kHz) |
| EM | Electromagnetic |
| EMC | Electromagnetic Compatibility |
| EMI | Electromagnetic Interference |
| EMR | Electromagnetic Radiation |
| EMTEL | Emergency Telecommunications |
| EN | European Norm |
| ENG | Electronic News Gathering |
| ENG/OB | Electronic News Gathering/Outside Broadcasting |
| EOS | Earth Observation Satellite |
| EOSS | Earth Observation Satellite System |
| EPFD | Equivalent Power Flux Density |
| EPIRB | Emergency position-indicating radio beacon |
| EPP | European Polar Platform |
| EPPA | European Public Paging Association |
| ERC | European Radiocommunications Committee (CEPT) |
| ERMES | Enhanced Radio Message System |
| ERO | European Radiocommunications Office (CEPT) |
| ERP | Effective Radiated Power (relative to a half-power dipole) |
| ESA | European Space Agency |
| ESCAP | Economic and Social Commission for Asia and the Pacific |
| ESF | European Science Foundation |
| ESPA | European Manufactorers of Personal Wireless Communications Equipment |
| ESOC | European Space Operation Center |
| ESR | EISCAT Svalbard Radar |
| ESTEC | European Space Research and Technology Centre |
| ESV | Earth Station on Board Vessel |
| E-TDMA | Extended Time Division Multiple Access |
| ETNO | European Public Telecommunications Network Operators’ Association |
| ETO | European Telecommunication Office |
| ETS | European Telecommunication Standard |
| ETSI | European Telecommunication Standards Institute |
| EU | European Union |
| EUTELSAT | European Telecommunication Satellite Organization |
| EUMETSAT | European Meteorological Satellite Organisation |
| EVA | Extra Vehicular Activity |
| EVN | European VLBI Network |