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QRSS may refer to:

  • The Quintana Roo Speleological Survey, a project that supports safe exploration of the caves in Quintana Roo, Mexico
  • Quasi Random Signal Source, a test pattern of the bit error rate test (BERT) methods for digital communication circuits
  • QRSS, a very low speed transmission mode used by amateur radio operators
  • QRSs, the plural of QRS