| Acronym | Meaning |
 | CYM | Cayman Islands (ISO 3166 Trigram) |
| XBA | European Composite Unit (EURCO; Bonds Market Unit) (ISO 4217 Currency Code) |
| DDR&E | (U.S.) Director Of Defense Research And Engineering (1958?1978) |
| CHAMPUS | (U.S.) Civilian Health And Medical Program Of The Uniformed Services |
| PSO | Peace Support Operations - Primary Standardisation Office (ABCA) - Protocol Supporting Organization (of The ICANN) |
| SMTP | Simple Mail Transfer Protocol |
| NRA | National Rifle Association |
| DEA | Drug Enforcement Agency |
| AFSCN | U.S. Air Force Satellite Control Network |
| RLS | Restless Leg Syndrome |
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