RCI
- City-building game
- Guadeloupe
- IGMDP
- Kaizen
- Martinique
- RCI (company)
- RCI Banque
- Radio Canada International
- Radio Caribbean International
- Random coil index
- Rehabilitation Council of India
- Research Centre Imarat
- Revival Centres International
- Revolutionary Communist International
- Riverside College, Inc.
- Rogers Communications
- Royal Canadian Institute
- Royal Caribbean International