Ru

Ru, ru, or RU may refer to:

• ISO 3166-1 alpha-2 kintra code for Roushie
• Rù (入), the enterin tone in Cheenese leid phonetics
• Rú (儒), a Cheenese leid term for Confucianism
• Ru (kana), the romanisation o the Japanese kana る an ル ; the same letters are uised tae substitute an L precedin a consonant when transliteratin Latin script wirds tae Katakana.
• Ru (river) (汝), a river in Henan
• Rack unit, a measurement o the heicht electronic equipment installed in 19 inch racks
• Rugby union
• the chemical seembol for the element Ruthenium
• the IATA airline code for AirBridge Cargo
• the ISO 639 alpha-2 code for the Roushie leid
• .ru, the Internet kintra code tap-level domain for Roushie
• The "backwards-R U" Recognized Component Mark o Underwriters Laboratories
• Ru ware o Cheenese ceramics