RN or Rn may refer to:

Places

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Politics

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Science and technology

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  • Radon, symbol Rn, a chemical element
  • rn (newsreader), a Usenet news client
  • Newline, represented as \r\n in certain operating systems
  • Euclidean space, with n dimensions, denoted by   or  
  • Round nose, a type of bullet
  • Recurrent nova, a class of repeating cataclysmic variable stars

Other

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