| Acronym | Meaning |
 | UPU | Universal Postal Union |
| OAC | Office Of Antiboycott Compliance |
| DPMO | Defense Prisoner Of War/Missing Personnel Office |
| NNSA | National Nuclear Security Administration |
| OALJ | Office Of Administrative Law Judges |
| EREN | Energy Efficiency And Renewable Energy Network |
| BSC | Business Service Centers |
| NAL | National Agricultural Library |
| OPHS | Office Of Public Health And Science |
| FDIC | Federal Deposit Insurance Corporation |
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