| Acronym | Definition |
|---|
| ECWG➣Extreme Cold Weather Gear |
| ECWG➣Earth Cover Working Group |
| ECWG➣Export Controls Working Group |
| ECWG➣Emergency Communications Working Group |
| ECWG➣Environmental Communications Working Group |
| ECWG➣Engineering Change Working Group |
| ECWG➣Electronic Combat Working Group |
| ECWG➣Electromagnetic Compatibility Working Group (IEEE Power Engineering Society) |
| ECWG➣Explorers Club Washington Group (McLean, VA) |