| Acronym | Meaning |
| DIC | Design Island Centre (computing Usually Used In A Teaching Situation) |
| FM | Fermium |
| JTF | Joint Task Force |
| CWRU | Case Western Reserve University |
| RA | Rain (METAR Code) -Rear Area - Reinforced Alert - Republican Army - Right Ascension - Royal Artillery (UK) - Royal Academy |
| RCT | Randomized Controlled Trial - Robotically Controlled Telescope |
| GM | Gigametre |
| PDRY | People's Democratic Republic Of Yemen (obsolete Since 1990) |
| YE | Yemen (ISO 3166 Digram) |
| OB | Obedience - Obligation - Obligatory - Obsolete - Obstetrics -Ocean Beach (California) - Off Break (cricket) - Old Bryanstonian - Order Of Battle - Outlet Box (electrical) -Overbought (stock Market) -Oversight Board |