| Acronym | Meaning |
 | LY | Libya (FIPS 10-4 Country Code; ISO 3166 Digram) - Lithuania (amateur Radio ITU Prefix) |
| GN | Guaran Language (ISO 639-1 Code) |
| LEMOSS | Long-Endurance MObile Submarine Simulator |
| RV | Reconnaissance Vehicle - Recreational Vehicle - Re-entry Vehicle |
| BWA | Botswana (ISO 3166 Trigram) |
| TRANSCOM | U.S. Transportation Command |
| MATREX | Modeling Architecture For Technology |
| AIR | Aircraft Inventory Record |
| KX | Cayman Airways (IATA Airline Designator) |
| CTC | Closed Timelike Curve (relativity) - (U.S.) Combat Training Center |
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