| Acronym | Meaning |
| NEH | National Endowment For The Humanities |
| ILAB | Bureau Of International Labor Affairs |
| NSA | National Security Agency |
| PTO | Patent And Trademark Office |
| GSFC | Goddard Space Flight Center |
| MCHB | Maternal And Child Health Bureau |
| AMTRAK | National Railroad Passenger Corporation |
| NGA | National Gallery Of Art; National Geospatial-Intelligence Agency |
| AOA | Administration On Aging |
| NWC | National War College |