| Acronym | Meaning |
 | PHN | Center For Population |
| WTO | World Trade Organization |
| NSC | National Security Council |
| NCPC | National Capital Planning Commission |
| NTSB | National Transportation Safety Board |
| NCS | National Communications System |
| ERS | Economic Research Service |
| SI | Smithsonian Institute |
| FANNIE MAE | Federal National Mortgage Association |
| PPQ | Plant Protection And Quarantine |
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