| Acronym | Meaning |
| USD(P) | (U.S.) Under-Secretary Of Defense (Policy) |
| DU | Depleted Uranium -Dust (METAR Code) |
| ACCD | American Coalition Of Citizens With Disabilities |
| CNI | Communications |
| TANP | Terrain-Aware Network Planner |
| DOE | U.S. Department Of Energy |
| LY | Libya (FIPS 10-4 Country Code; ISO 3166 Digram) - Lithuania (amateur Radio ITU Prefix) |
| WB | Warner Brothers - Welcome Back (Internet Short-hand) |
| ERA | Earned Run Average - Engineering Research Associates - Equal Rights Amendment - English Racing Automobiles - European Railway Agency |
| SOFIA | Stratospheric Observatory For Infrared Astronomy |