| Acronym | Meaning |
| PNH | Paroxysmal Nocturnal Hemoglobinuria - Police Nationale D'Ha?ti (French |
| 2D | Two |
| BUR | Burma (ISO 3166 Trigram; Obsolete Since 1989) |
| RPO | Radiation Protection Officer |
| RAP | Radio Access Point - Radiological Assistance Program (U.S. Department Of Energy) - Rear Area Protection - Recognised [Operating/Operational] Air Picture - Recurring Advance Payment - Relational Associative Processor - Reliable Acoustic Path - Rocket-Assis |
| NP | Nepal (ISO 3166 And FIPS 10-4 Country Code Digram) |
| ABC | Abstinence |
| UR | Soviet Union (NATO Country Code |
| B?C | Blue ?yster Cult |
| IPK | Inupiaq Language (ISO 639-2 Code) |