RDF
- Direction finding
- List of Robotech characters
- RDF Media
- RDF Schema
- Radial distribution function
- Radical Dance Faction
- Random dopant fluctuation
- Rapid Deployment Force (United States)
- Real degree of fermentation
- Reality distortion field
- Reduced dimensions form
- Refuse-derived fuel
- Reichsbund Deutsche Familie, Kampfbund für erbtüchtigen Kinderreichtum
- Relative directivity factor
- Reserve Defence Forces
- Resource Description Framework
- Richard Dawkins Foundation for Reason and Science
- Rwandan Defence Forces