| Acronym | Meaning |
 | HJD | Heliocentric Julian Day |
| MJ | Megajoule |
| AHRQ | Agency For Healthcare Research And Quality |
| PW | Palau (postal Symbol; ISO 3166 Digram) - Petawatt |
| CRI | Costa Rica (ISO 3166 Trigram) |
| PDT | Pacific Daylight [Saving] Time (UTC-7 Hours) |
| CAVOK | Ceiling And Visibility OK (Kav-okay) |
| RPA | Regional Plan Association |
| RDV | Remote Detection Vehicle |
| MEDEVAC | Medical Evacuation |
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