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TR or tr may stand for:

In official codes:

In history:

In engineering, science and computing:

In medicine:

In music:

  • Trill
  • TR-808, TR-909 etc., 1980s Roland drum machines (for "Transistor Rhythm")
  • Korg TR, a music workstation synthesizer

In games:

In transportation:

In places:

In other uses: