| Acronym | Meaning |
 | MH | Marshallese Language (ISO 639-1 Code) |
| RH | Rhodium |
| MSDL | Military Scenario Definition Language |
| HRF | High Readiness Forces |
| CXR | Christmas Island (ISO 3166 Trigram) |
| SD | Sheriff's Department - Smoke/Decontamination-South Dakota (postal Symbol) - Sudan (ISO 3166 Digram) |
| BLUI | Body Language User Interface (blooie) |
| PAPI | Precision Approach Path Indicator (aviation) |
| AT | Anti-Tank -Ashmore And Cartier Islands (FIPS 10-4 Territory Code) - Austria (ISO 3166 Digram) -Advanced Technology (IBM Personal Computer/AT) |
| LVEF | Left Ventricular Ejection Fraction |
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