R3

R3 or R-3 or R/3 may refer to:
* R3 (computer game), a computer game for the Amiga series of computers in 1995
* R3 (European Commission unit), the Information System Development and Support unit within Information Society Directorate-General of the European Commission
* R3 (SEPTA), a SEPTA Regional Rail line in and near Philadelphia, Pennsylvania
* R3 (song), by Reo Nagumo for the game "Beatmania IIDX"
* "R3" (TV series), produced by the BBC between 1964 and 1965
* , a risk phrase in chemistry
* Expressway R3, an expressway in the Czech Republic
* Motorroad R3 (Slovakia)
* USS R-3 (SS-80), a 1919 R-class coastal and harbor defense submarine of the United States Navy
* BBC Radio 3, operated by the BBC within the United Kingdom
* Yakutia Airlines, via its IATA airline designator
* SAP R/3, enterprise resource planning software produced by SAP AG, new name is SAP ERP
* Vympel K-13, air-to-air missile known as R-3S in Soviet service
* DVD region code 3
* Ågestaverket, also known as R3, was the third nuclear reactor built in Sweden
* R-3 process, a chromogenic photo process for making Type R prints

ee also

* R03, disambiguation page