English abbreviations from rcn to rcr
- RCN (Royal Canadian Navy)
- RC NORTH (NATO Regional Command NORTH)
- RCO (Regenerative Catalytic Oxidizer)
- RCO-AK (Regional Contracting Office - Alaska)
- RCOE (Riverside County Office of Education)
- RCOG (Royal College of Obstetricians and Gynaecologists)
- RCO-NE (Regional Contracting Office - NorthEast)
- RCOP (Research Center for Optical Physics)
- RCOT (Reserve Commissioned Officer Training)
- RCP (Royal College of Pathologists)
- RCPA (Royal College of Pathologists of Australasia)
- RCPAC (Reserve Components Personnel and Administrative Center)
- RCPC (Resource Center for Parents and Children)
- RCPOR (Roper Center for Public Opinion Research, University of Connecticut)
- RCQ (Reconquista Airport)
- RCR (Reverse current relay)