| Abbreviation | Definition |
|---|---|
| ETB | Empresa de Telecomunicaciones de Bogotá |
| ETC | Eligible Telecommunications Carrier |
| ETC | Eligible Telecommunications Carriers |
| ETC | Emergency Telecommunications Cluster |
| ETC | Enhanced Telecommunications Corporation |
| ETE | Electronics and Telecommunication engineering |
| ETET | Electrical and Telecommunications Engineering Technology |
| ETF | Early Termination Fee |
| ETIT | Electronic Telecommunication Information Technology |
| ETN | Electronic Tandem Network |
| ETNS | European Telephony Numbering Space |
| eTOC | Electronic Table of Contents |
| ETOM | Electronic Telecom Operations Map |
| eTOM | Enhanced Telecom Operations Map |
| ETPI | Eastern Telecom Phil Inc |
| ETRI | Electronics and Telecommunications Research Institute |
| ETS | Emergency Telecommunications Service |
| ETS | End of Transmission Signal |
| ETS | European Telecommunication Standard |
| ETSI | European Telecom Standard Institute |