English abbreviations from radius to rage
- RADIUS (Remote Authentication Dial In User Service)
- RADM (Rear Admiral)
- RADS (Radar Acquisition Data System)
- RAE (Royal Aircraft Establishment, Royal Aircraft Establishment (Farnborough))
- RAF (Royal Air Force)
- RAFA (Royal Air Force Association)
- RAFB (Randolph Air Force Base)
- R-AFF (Regimental Affiliation)
- RAFGL (See AFGL.)
- RAFGSA (Royal Air Force Gliding and Soaring Association)
- RAFSA (Royal Air Force Sailing Association)
- RAFT (Remote Accessible Field Trips)
- RAG (Replacement Air Group, now known as Fleet Replacement Squadron (FRS))
- RAGBRAI (Register's Annual Great Bicycle Ride Across Iowa)
- RAGE (Reaching A Generation Endangered)