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TRR may refer to:

  • China Bay Airport near Trincomalee, Sri Lanka
  • Tamper-resistant receptacle, child-safe power receptacle required in new and renovated dwellings since the U.S. 2008 National Electrical Code
  • Target row refresh, a hardware feature of DDR4 used to prevent the row hammer effect from occurring
  • Tehran Research Reactor, an Iranian nuclear research reactor, supplied by the U.S. in 1960
  • Three Rivers Review, a Literary magazine published by the University of Pittsburgh
  • Total Return Rate (in finance), the price return + the dividend return
  • Transaction reply report, used to reconcile a health insurance provider's enrollment of Medicare members with centers for Medicare and Medicaid services (CMS)
  • test readiness review - to determine whether the system under review is ready to proceed into formal testing