| Acronym | Meaning |
 | NAA | N-Acetylaspartate |
| NSS | (U.S.) Naval Simulation System |
| ISRO | Indian Space Research Organisation |
| QK | Air Canada Jazz (IATA Airline Designator) |
| MOPP | Mission-Oriented Protective Posture |
| BD | Bangladesh (ISO 3166 Digram) - Bermuda (FIPS 10-4 Territory Code) |
| HDTV | High-Definition Television |
| RTBF | Radio-T?l?vision Belge De La Communaut? Fran?aise |
| NASA | National Aeronautics And Space Administration |
| HYE | Armenian Language (ISO 639-2 Code) |
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