RCR
- Association of Radio Industries and Businesses
- Charles Chalmers
- Fulton County Airport (Indiana)
- RC Relizane
- RCR Tomlinson
- Radio Caracas Radio
- Ramsbottom Carbon Residue
- Ranchi Rays
- Rational consequence relation
- Real closed ring
- Resorts of the Canadian Rockies
- Retro City Rampage
- Richard Childress Racing
- Richland Creek Reservoir
- Riot City Ravens
- River City Renaissance
- River City Rollergirls
- Rolling circle replication
- Royal College of Radiologists
- The Lonesome Rhodes
- The Royal Canadian Regiment