IRR 259025 218255157 2008-06-09T21:04:05Z 62.107.152.142 '''IRR''' is a [[three-letter acronym]] that may refer to: * In finance, the [[internal rate of return]] * In computer science, [[Interrupt|Interrupt Request Register]], used to indicate interrupts awaiting service * In electrical engineering, the [[image rejection ratio]] * In computer networking, the [[Internet Routing Registry]] * In art conservation-restoration, [[Infrared Reflectography]] * The [[Individual Ready Reserve]] of the United States military * The [[Iranian rial]] * [[Iraqi Republic Railways]] * The [[Institute of Race Relations]] and its newsletter, the Independent Race and Refugee News Network * [[Integra Realty Resources]], the largest real estate appraisal company in the U.S. * The Australian [[Australian Incident Response Regiment|Incident Response Regiment]] * In the United States Military, it stands for [[Individual Ready Reserve]] (sometimes referred to inactive ready reserve). * In [[Sheffield]], [[England]] ** [[Sheffield Inner Ring Road|Inner Ring Road]] ** [[Sheffield Northern Relief Road|Inner Relief Road]] * In [[UK]] Law, the [[Ionising Radiations Regulations 1999]] {{disambig}} [[de:IRR]] [[eo:IRR]] [[fr:IRR]] [[it:IRR]]