| Acronym | Meaning |
 | PCP | Phencyclidine - Pneumocystis Jiroveci Pneumonia (formerly Peumocystis Carinii) -Probabilistically Checkable Proof |
| ODB | Operational Data Base -Oxford Dictionary Of Byzantium |
| USD | (U.S.) Under-Secretary Of Defense -U.S. Dollar (ISO 4217 Currency Code) |
| LRU | Line-Replaceable Unit |
| CERN | Centre Europ?en Pour La Recherche Nucl?aire (French |
| IX | Nine (in Roman Numerals) |
| MOB | Man Over Board - Marching Owl Band - Movable Object Block |
| PY | Paraguay (ISO 3166 Digram) - Person-Year -Portsmouth Yardstick |
| B&W | Babcock & Wilcox - Black And White - Bowers & Wilkins |
| MDW | Chicago Midway International Airport In Chicago |
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