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Encyclopedic overview
IIR may refer to: Institute of International Relations (disambiguation) Institute for International Research, a human capital development company acquired by Informa International Institute of Refrigeration Imaging infrared, in munitions guidance systems Indo-Iranian languages Infinite impulse response Isobutylene isoprene rubber (butyl rubber)
Excerpted from Wikipedia’s “IIR” article, available under the CC BY-SA 4.0 licence.