| Abbreviation | Definition |
|---|---|
| ECOA | Enemy Courses Of Action |
| ECOM | Electronics Command, Ft. Monmouth, NJ |
| ECOM | expired coupons for overseas military |
| ECOSOC | Economic and Social Council (UN) |
| ECP | Early Commissioning Program |
| ECP | Emergency Command Precedence |
| ECP | Entry Control Point |
| ECP | Event Control Panel |
| ECP | Exercise Control Plan |
| ECP | Extended Capabilities Port |
| ECQC | Extreme Close Quarters Combat |
| ECR | Electronic Combat Reconnaissance |
| ECR | Engineering Change Record |
| ECR | Engineering Change Request |
| ECRU | Enhanced Command Response Unit |
| ECS | Engagement Control Station |
| ECS | Engineer Combat System |
| ECS | Equipment Concentration Site |
| ECS | Exercise Control System |
| ECS | Expeditionary Combat Support |