Ru

Ru, ru, or RU may refer to:

Russia

 * Russia (ISO 3166-1 alpha-2 country code)
 * Russian language (ISO 639 alpha-2 code)
 * .ru, the Internet country code top-level domain for Russia

China

 * Rù (入), the entering tone in Chinese language phonetics
 * Rú (儒), a Chinese language term for Confucianism
 * Ru (surname) (茹), a Chinese surname
 * Ru River (汝), in Henan, China
 * Ru ware, a type of Chinese pottery

Educational institutions

 * Rajasthan University in Rajasthan, India
 * Radboud University Nijmegen, in Nijmegen, Netherlands
 * Radford University, in Virginia, USA
 * Rai University in Gujarat, India
 * Rajshahi University in Bangladesh
 * Rama University in India
 * Ramkhamhaeng University in Thailand
 * Regis University in Colorado, USA
 * Reykjavík University Iceland
 * Rhodes University in Grahamstown, South Africa
 * Rockefeller University in New York, USA
 * Rockhurst University in Missouri, USA
 * Roosevelt University in Chicago, Illinois, USA
 * Rowan University in New Jersey, USA
 * Ruse University in Bulgaria
 * Rutgers University in New Jersey, USA
 * Ryerson University, the former name of Toronto Metropolitan University in Ontario, Canada

Science and technology

 * Resource Unit, a unit used in 802.11 wireless
 * Rack unit, a measurement of the height electronic equipment installed in 19-inch racks
 * Ruthenium, symbol Ru, a chemical element
 * The "backwards-R U" Recognized Component Mark of Underwriters Laboratories

Transport

 * AirBridge Cargo (IATA airline code)
 * Renigunta Junction railway station (Indian Railways station code)

Other uses

 * Reino Unido, the Spanish name of the United Kingdom
 * Royaume-Uni, the French name of the United Kingdom
 * Regno Unito, the Italian name of the United Kingdom
 * Ru (kana), the romanisation of the Japanese kana る and ル
 * Ru (cuneiform), a sign in cuneiform writing
 * Ru (novel), a novel by Canadian novelist Kim Thúy
 * Ru (film), a film by Canadian director Charles-Olivier Michaud based on Kim Thúy's novel
 * Ruanda-Urundi, former German and Belgian colony (today Rwanda and Burundi)
 * Rückkehr unerwünscht "return unwanted", a Nazi designation for concentration camp prisoners who were forbidden to be released
 * RuPaul, an American drag queen, actor, and television personality
 * Rugby union