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IRF is a three-letter acronym that stands for:

  • Impulse response function
  • Information Retrieval Facility
  • Initial Reaction Force or Immediate Response Force
  • Institute of Space Physics (Sweden), (Institutet för rymdfysik)
  • Interferon Regulatory Factor (e.g. IRF6)
  • International Rectifier, New York Stock Exchange symbol IRF

In foundations/organizations:

  • Independent Research Forum
  • International Ranger Federation
  • International Road Federation
  • International Rogaining Federation
  • Islamic Research Foundation

In computing:

  • Intelligent Resilient Framework, Virtual Switch Chassis Aggregation