| Abbreviation | Definition |
|---|---|
| ECDS | Enhanced Container Delivery System |
| ECE | Elements of Communications Equipment |
| ECF | Elite Combat Force |
| ECF | Engineering Computer Facility |
| ECG | Emergency Coordination Group |
| ECG | Exercise Control Group |
| ECHA | Executive Committee For Humanitarian Affairs |
| ECHO | European Community Humanitarian Aid Department |
| ECI | Engineering Change Instruction |
| ECIT | Enhanced Communication Interface Terminal |
| ECJ | Engineering Change Journal |
| ECL | Equator Crossing Longitude |
| ECM | Electronic Counter Measure |
| ECM | Electronic Countermeasures |
| ECM | Electronic Counter-Measures |
| ECMRA | Enterprise-Wide Contractor Manpower Reporting Application (US DoD) |
| ECN | Electronic Change Notice |
| ECN | Minimum Essential Emergency Communications Network |
| ECO | Electronic Combat Officer |
| ECO | Engineering Change Order |