| Acronym | Meaning |
 | STB | Surface Transportation Board |
| FTA | Federal Transit Administration |
| DLSA | Defense Legal Services Agency |
| NRO | National Reconnaissance Office |
| ACDA | United States Arms Control And Disarmament Agency |
| BIS | Bureau Of Industry And Security |
| ECA | Bureau Of Educational And Cultural Affairs |
| NCS | National Communications System |
| HPCC | High Performance Computing And Communications |
| JCS | Joint Chiefs Of Staff |
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