| Acronym | Meaning |
| SONAR | SOund Navigation And Ranging |
| HST | See Entry |
| MHL | Marshall Islands (ISO 3166 Trigram) |
| XVII | Seventeen (in Roman Numerals) |
| CSL | U.K. Central Science Laboratory |
| SG | Senegal (FIPS 10-4 Country Code) - Singapore (ISO 3166 Digram) - Snow Grains (METAR Code) -Study Group |
| LAD | Laser Aiming Device |
| MOE | Marvel Of Entertainment |
| TCAS | Traffic Collision Avoidance System |
| FWT | Fresh Water Tank |