R (disambiguation)
- "R" Is for Ricochet
- /r/ (disambiguation)
- ATC code R
- Alkyl group
- Arginine
- Basic reproduction number
- Coefficient of relationship
- Effective reproduction number
- Electrical resistance
- Gamma function
- Gas constant
- Hanwa Line
- Haplogroup R (Y-DNA)
- Haplogroup R (mtDNA)
- IBM System R
- International Phonetic Alphabet
- List of military time zones
- Model R (disambiguation)
- Motion Picture Association of America film rating system
- Net reproduction rate
- Nissan Skyline GT-R
- Pearson product-moment correlation coefficient
- QuakeNet
- R
- R (New York City Subway service)
- R (cable operator)
- R (complexity)
- R (cross section ratio)
- R (film)
- R (programming language)
- R (single album)
- R class (disambiguation)
- R* (disambiguation)
- R+ (disambiguation)
- R- (disambiguation)
- R-value (insulation)
- R-value (soils)
- R. (R. Kelly album)
- R. (disambiguation)
- R/S convention
- RR (disambiguation)
- RRR (disambiguation)
- RRRR (disambiguation)
- Rajawali Televisi
- Rankine scale
- Rated R (Queens of the Stone Age album)
- Reconnaissance aircraft
- Registered trademark symbol
- Republican Party (United States)
- Restricted airspace
- Ricci curvature
- Right (direction)
- Rinkai Line
- Ritardando
- Roentgen (unit)
- Rydberg constant
- Rydberg unit of energy
- Ryder
- Ryoko Shiraishi
- R° (Ruratia album)
- R·Type
- Réaumur scale
- Rømer scale
- San'yō Main Line
- Side chain
- South African rand
- Spectral resolution
- Subreddit
- The Chase (Doctor Who)
- The Crown
- The World Is Not Enough
- The three Rs
- Transilien Line R
- Type R (disambiguation)
- Volkswagen R
- Warm Bodies
- Warm Bodies (film)
- Я