| Acronym | Meaning |
 | R&R | Rest & Relaxation |
| FM | Federal Magistrate (Australian Post-nominal) -Federated States Of Micronesia (postal Symbol; ISO 3166 Digram; FIPS 10-4 Territory Code) -Field Manual - Flight Manager - Frequency Modulation (electronics) |
| HAW | Heavy Antitank Weapon |
| NAMRL | Naval Aerospace Medical Research Laboratory |
| BATF | U.S. Bureau Of Alcohol |
| EU | Basque Language (ISO 639-1 Code) |
| TSA | Theatre Storage Area - Time Slot Allocation - Transportation Security Administration |
| CIBC | Canadian Imperial Bank Of Commerce (obsolete) |
| DCAA | (U.S.) Defense Contract Audit Agency |
| MACHO | MAssive Compact Halo Object |
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