Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym SIR is...

SIR is

  • Sexy Intelligent Racer
  • Sorry I'm Retarded

More Meanings For SIR:

  • Serial Infrared
  • Solitaire file Bitmap graphics
  • System Internal Resource
  • Sustained Information Rate
  • Surface Insulation Resistance
  • Shuttle Imaging Radar
  • Science Information Robot
  • Sexy Intelligent Racer
  • Sorry I'm Retarded
  • System Intermediate Representation
  • Silent Information Regulator
  • Soil Insect Rating
  • Standard Information Retrieval
  • String Instrument Repair
  • Sort Interval Recursive

SIR is also in:

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