| Acronym | Meaning |
 | BQ | British Antarctic Territory (ISO 3166 Digram; Merged With AQ In 1979) - Navassa Island (FIPS 10-4 Territory Code) |
| GALCIT | Guggenheim Aeronautical Laboratory |
| NN | Nanonewton |
| SSBN | Nuclear-Powered Ballistic Missile Submarine (US Navy Hull Classification) |
| JBFSA | Joint Blue Force Situational Awareness |
| NP | Nepal (ISO 3166 And FIPS 10-4 Country Code Digram) |
| UGV | Unmanned Ground Vehicle |
| BARDA | Biomedical Advanced Research & Development Agency |
| USDOE | United States Department Of Energy |
| HCCI | Homogeneous Charge Compression Ignition |
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