R4
From Wikipedia, the free encyclopedia
R4 can mean:
- In mathematics, R4 is a 4-manifold which is isomorphic to the direct product of four real lines. See also Exotic R4.
- R4 (New York City Subway car)
- The R4 ringway around Ghent, Belgium, see nl:R4 (België)
- R4 is the IATA code for Russia State Transport Company
- R4 is an AC compressor made by GM.
- R4 is the Renault 4 car.
- A visualization program developed by Gordon Williams. The name is derived as this is the fourth iteration of the software. Website
- The SEPTA Regional Rail R4 line (no longer numbered that) in Philadelphia, Pennsylvania
- The R4, a South African assault rifle.
- An abbreviation for R4-P17, an astromech droid in the Star Wars universe.
- An abbreviation for BBC Radio 4, a British radio station
- R4: Ridge Racer Type 4, a racing game for Sony PlayStation developed by Namco
- Suzuki GSX-R/4, a concept car made by Suzuki in 2001
- USS R-4 (SS-81), a submarine of USA Navy
- Bisnovat R-4 is a Soviet missile
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