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PRR may refer to:

  • Packet Reception Ratio, a metric of reliability in computer networks
  • Parietal reach region of the human brain
  • Pattern recognition receptor, receptors of the innate immune system that identify pathogen-associated molecular patterns
  • Peachtree Road Race, a 10 kilometer road race held annually in Atlanta, Georgia
  • Pennsylvania Railroad, an American railroad
  • Personal Role Radio, a radio carried by UK troops
  • Princes Risborough railway station's National Rail station code
  • Production Rule Representation, an IT rules standard
  • Proportional reporting ratio, a statistic used in data mining for health surveillance systems
  • Pure Reason Revolution, a British progressive rock band