| Abbreviation | Definition |
|---|---|
| ECC | The Evolution Control Committee |
| ECCC | European Creep Collaborative Committee |
| ECCI | Executive Committee of the Communist International |
| ECDC | Economic and Community Development Committee |
| ECDC | Economic Community Development Committee |
| ECIC | Executive Council Investment Committee |
| ECIL | Emergency Committee for Israel's Leadership |
| ECIS | European Committee for Interoperable Systems |
| ECLC | Emergency Civil Liberties Committee |
| ECOE | Executive Committee For Overseas Evangelism |
| ECOP | Extension Committee on Organization and Policy |
| ECOPS | European Committee on Ocean and Polar Sciences |
| ECPT | Egyptian Committee for Pathology Training |
| ECRC | End of confinement review committee |
| ECRIC | Emigration Canyon Roadway Improvement Committee |
| ECRR | European Committee on Radiation Risk |
| ECSC | European Cooperation and Security Committee |
| ECSG | Executive Committee Study Group |
| ECSM | Egyptian Committee for Surveying and Mapping |
| ECTC | Evolutionary Computation Technical Committee |