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RR or rr may refer to:

Arts and entertainment[edit]

Businesses and organizations[edit]


Science and technology[edit]

Biology and medicine[edit]

Other uses in science and technology[edit]


  • Rajasthan Royals, an Indian Premier League franchise
  • Ranchi Rhinos, a defunct Hockey India League franchise
  • Run rate, an average number of runs a batsman (or the batting side) scores in an over of 6 balls in cricket


Other uses[edit]

  • Roraima (ISO 3166 code BR-RR), a state in Brazil

See also[edit]