| Abbreviation | Definition |
|---|---|
| USC | USAREUR Subordinate Command |
| USCC | United States Colored Cavalry |
| USCENTAF | United States Central Command Air Forces |
| USCENTCOM | United States Central Command |
| USCG | United States Coast Guard |
| USCGA | United States Coast Guard Academy |
| USCGA | United States Coast Guard Auxiliary |
| USCGB | United States Coast Guard Bark |
| USCGB | United States Coast Guard Bicentennial |
| USCGB | United States Coast Guard Boat |
| USCGCPOA | United States Coast Guard Chief Petty Officers Association |
| USCGE | United States Coast Guard Engineering |
| USCGG | United States Coast Guard Group |
| USCGG-KW | United States Coast Guard Group - Key West |
| USCGG-O | United States Coast Guard Group - Oregon |
| USCGL | United States Coast Guard Liaison |
| USCGNET | United States Communications Grid Network |
| USCGP | United States Coast Guard Product |
| USCGR | United States Coast Guard Recruiter |
| USCGR | United States Coast Guard Reserve |