| Abbreviation | Definition |
|---|---|
| USCM | United States Colonial Marine |
| USCM | United States Colonial Marines |
| USCM | Universal Space Corporate Military |
| USCMC | United States Colonial Marine Corps |
| USCS | United States Counter Strike |
| USCS | United States Cryptologic System |
| USCT | United States Colored Troops |
| USCYBERCOM | United States Cyber Command |
| USD | U.S. Direct Hire Civilians |
| USD | Under Secretary of Defense |
| USD(A&T) | Under Secretary of Defense For Acquisition and Technology |
| USD(A) | Under Secretary of Defense for Acquisition |
| USD(AT&L) | Under Secretary of Defense For Acquisition, Technology, and Logistics |
| USD(C) | Under Secretary of Defense (Comptroller) |
| USD(I) | Under Secretary of Defense For Intelligence |
| USD(P&R) | Under Secretary of Defense For Personnel and Readiness |
| USD(P) | Under Secretary of Defense For Policy |
| USD(R&E) | Under Secretary of Defense For Research and Engineering |
| USD/A | Under Secretary of Defense for Acquisition |
| USD/P | Under Secretary of Defense for Policy |