| Acronym | Meaning |
 | RCAR | Research Council For Automobile Repairs (are-car) |
| USPS | United States Postal Service |
| FYDP | Five-Year Defense Plan (U.S.) |
| AOA | Argonne National Laboratory -Angolan Kwanza (ISO 4217 Currency Code) -Award Of Arms (heraldry) |
| CCP | Casualty Collection Point - Communications Checkpoint - Contingency Communications Package |
| SFF | Standard File Format |
| TWAT | The War Against Terror |
| WLN | Walloon Language (ISO 639-2 Code) |
| PCP | Phencyclidine - Pneumocystis Jiroveci Pneumonia (formerly Peumocystis Carinii) -Probabilistically Checkable Proof |
| CASTFOREM | Combined Arms And Support Task FORce Evaluation Model |
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