R1

R1, R.I, R01 or R-1 may refer to:

Military equipment

• R-1 (missile), a post World War II Russian rocket
• AEG R.I, a 1918 German super-heavy bomber design
• DFW R.I, a 1916 German prototype bomber aircraft
• Linke-Hofmann R.I, a World War I German prototype bomber aircraft
• Polikarpov R-1, a Soviet Union copy of the 1931 British Airco DH.9A light bomber aircraft
• USS R-1 (SS-78), a 1918 United States Navy R-class coastal and harbor defense submarine
• a South African made version of the FN FAL battle rifle
• a version of the 1942 German Rheintochter ground-to-air missile

Transport

• R1 motorway (Belgium), a ring road around Antwerp
• R1 expressway (Czech Republic), an expressway in Czech Republic
• R-1 road (Philippines), a road connecting the centre of Manila and Pasay City
• R1 expressway (Slovakia), a road connecting Trnava and Banská Bystrica
• R-1 motorway (Spain), a future radial motorway connecting Madrid and El Molar
• R1 (New York City Subway car)
• R1 (SEPTA), a former commuter rail line in Philadelphia, Pennsylvania, which was split into:
  • Airport Line (SEPTA), or R1 Airport line
  • SEPTA Main Line (R1 Glenside) Also called the Glenside Combined
• Beriev R-1, a 1952 Soviet turbojet-powered flying boat
• Jaguar R1, the chassis with which the Jaguar Racing Formula One team competed in the 2000 Formula One season
• LCDR R1 class, a class of 0-4-4T steam locomotives built by the South Eastern and Chatham Railway to modified LCDR design in 1900
• PRR R1, a 1934 American single prototype electric locomotive
• SECR R1 class, a class of 0-6-0T steam locomotives rebuilt by the South Eastern and Chatham Railway from the SER R class between 1910 and 1922
• Subaru R1, a car
• Yamaha YZF-R1, a motorcycle
• International Air Transport Association code for Sirin (airline)

Computing

• R1 (expert system), a 1978 expert system written by John McDermott
• .r01, a RAR file extension
• an alternate name for the Rice Institute Computer, an innovative computer extant at Rice University from 1959–1971

Biology

• R1 plasmid, a plasmid found in E Coli
• ATC code R01 Nasal preparations, a subgroup of the Anatomical Therapeutic Chemical Classification System
• Haplogroup R1 (Y-DNA), a human Y-chromosome DNA haplogroup
• R01 : Cardiac murmurs and other cardiac sounds ICD-10 code

Other

• R1 Club, R1 Club or R1 Group, a leading provider of luxury and executive services in the Asia-Pacific region
• R1: Explosive when dry, a risk phrase
• R1 Multi-frequency signaling, a telephony control technique
• R1 (nuclear reactor), the first nuclear reactor of Sweden
• R-1 (singer), a rapper from the Dominican Republic
• R1 space in topology, in mathematics
• DSC-R1, a 2005 Sony Cyber-shot R series camera
• TV R1, Czech regional television station
• R1, a brand sold by Imperial Tobacco
• Region 1, the DVD region code for United States, Canada, Bermuda, U.S. territories
• BBC Radio 1, a national radio station in the United Kingdom
• R1 or RI, Research I university
• Radio One (New Zealand) a New Zealand student radio station