| Acronym | Meaning |
 | LIGO | Laser Interferometer Gravitational Wave Observatory |
| C | Centi |
| PASGT | Personnel Armor System |
| WIA | Wounded In Action |
| AFIS | Automated Fingerprint Identification System - American Forces Information Service |
| DJ | Disc Jockey - Dinner Jacket -Djibouti (ISO 3166 Digram; FIPS 10-4 Country Code) |
| EST | Eastern Standard Time (UTC-5 Hours) -Estonia (ISO 3166 Trigram) |
| STH | Sonic The Hedgehog |
| FES | Flywheel Energy Storage |
| GAAR | General Anti-Avoidance Rule (tax Evasion) |
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