| Acronym | Meaning |
 | YH | Yoctohenry |
| FAT | Field Artillery Tractor - File Allocation Table |
| ECS | Emergency Contact System - Enhanced Chip Set (computing) - EOSDIS Core System - Extended Chip Set (computing) |
| FSB | Federal'naya Sluzhba Bezopasnosti Rossiyskoi Federatsii (???????????? ??????? ????????????? ??????????? ?????????? |
| NAV | Navigation[al] |
| BAK | Bashkir Language (ISO 639-2 Code) |
| ACLOS | Automatic CLOS (missile Control System) |
| LAPD | Los Angeles Police Department |
| DXA | Dual-energy X-ray Absorptiometry |
| QCA | Qualifications And Curriculum Authority - Quality Council Of Alberta |
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