| Acronym | Meaning |
| PCP | Phencyclidine - Pneumocystis Jiroveci Pneumonia (formerly Peumocystis Carinii) -Probabilistically Checkable Proof |
| OPS | Operations |
| LAAS | Local Area Augmentation System - Los Angeles Astronomical Society |
| DK | Denmark (ISO 3166 Digram) |
| WHS | (U.S.) Washington Headquarters Services |
| FISA | F?d?ration Internationale Des Soci?t?s D'Aviron (French |
| PMSC | NATO Political-Military Steering Committee On Partnership For Peace |
| NBT | Nitroblue Tetrazolium (assay) |
| WAN | Wide Area Network |
| UDTS | Uppsala-DLR Trojan Survey |