RDA
- Australian Research Data Commons
- Dietary Reference Intake
- Oracle database
- RDA (Avatar)
- Racial Discrimination Act 1975
- Rafael dos Anjos
- Rassemblement Démocratique Africain
- Rawalpindi Development Authority
- Reader's Digest Association
- Redevelopment agency
- Redland railway station
- Redundancy analysis
- Regional development agency
- Relative dentin abrasivity
- Remote Database Access
- Representational difference analysis
- Research Data Alliance
- Research and Development Array
- Resource Description and Access
- Retro-Diels–Alder reaction
- Revolving Doors Agency
- Richard Dean Anderson
- Riding for the Disabled Association
- Road Development Authority
- Robotic process automation
- Roshan Digital Account
- Rules of Decision Act
- Rural Development Academy