| Acronym | Meaning |
| RRN | Recurrence Rate Number |
| DX | Dexterity (role-playing Games) -DeXtrorphan - Distant (radio) -D-Generation X (professional Wrestling) |
| IA | Iowa (postal Symbol) |
| SHRA | Rain Showers (METAR Code) |
| ARSC | Arctic Region Supercomputing Center |
| WVA | World Veterinary Association |
| TRASANA | TRADOC Systems Analysis Agency |
| DMPFC | DorsoMedial PreFrontal Cortex |
| AMRAAM | Advanced Medium-Range Air-to-Air Missile |
| ZHA | Zhuang Language (ISO 639-2 Code) |