South African made version of the FN FAL battle rifle

BBC Radio 1, a British radio station

Yamaha YZF-R1, a motorcycle

An abbreviation for DVD region code 1

Haplogroup R1 (Y-DNA)

Real Personal Trooper Type-1, a fictional original mecha from the Super Robot Wars series

Reemtsma No. 1, a brand of cigarettes made by Imperial Tobacco

R1 (SEPTA), a commuter rail line in Philadelphia, Pennsylvania

R-1 (missile), a post World War II Russian rocket

R1 (New York City Subway car)

Subaru R1, a car

International Air Transport Association code for Sirin (airline)

R1 (expert system), an expert system written by John McDermott

AEG R.I, a German World War I super-heavy bomber design

An alternate name for the Rice Institute Computer, an innovative computer extant at Rice University from 1959-1971

R1 Multi-frequency telephone signaling

R1 (nuclear reactor), the first nuclear reactor of Sweden

R1 Club, R1 Club or R1 Group, a leading provider of luxury and executive services in the Asia-Pacific region