| Acronym | Meaning |
 | HAT | Highest Astronomical Tide (nautical Charts) -Hungarian Automated Telescope |
| AFSC | U.S. Air Force Staff College (obsolete; Replaced With JFSC). - U.S. Air Force Systems Command |
| PAB | Panamean Balboa (ISO 4217 Currency Code) |
| GTA | Grand Theft Auto |
| YM | Yottametre |
| BQ | British Antarctic Territory (ISO 3166 Digram; Merged With AQ In 1979) - Navassa Island (FIPS 10-4 Territory Code) |
| TSEC | Transmission Security Encryption Code |
| PFO | Pissed |
| TIC | Troops In Contact |
| LSND | Liquid Scintillator Neutrino Detector |
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