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QSR may refer to:

  • Quick service restaurants, also known as fast food restaurants
  • Restaurant Brands International, which trades under the symbol QSR
  • Quasar, Quasi-Stellar Radio-source
  • IATA airport code for Salerno Costa d'Amalfi Airport
  • Quality System Regulation, U.S. Food and Drug Administration regulations requiring manufacturers to implement and follow quality systems
  • QSR International, Melbourne-based software developer specialising in qualitative research software
  • Q codes for amateur radio