Editing IR (section)

==Science and technology==
===Biology and medicine===
* Immediate-release, related to [[time release technology]] in pharmaceuticals
* [[Incidence Rate]], in epidemiology
* [[Insulin receptor]], a transmembrane receptor that is activated by insulin
* [[Insulin resistance]], a pathological condition
* [[Interventional radiology]] and interventional radiologist, an independent medical specialty
* [[Inverted repeat]], a sequence of nucleotides that is the reversed complement of another sequence further downstream

===Computing===
* [[.ir]], the Internet country code top-level domain for Iran
* [[Adobe ImageReady]], a bitmap graphics editor shipped with Adobe Photoshop by Adobe Systems
* [[Image retention]], the LCD and plasma display equivalent of screen burn
* [[Information retrieval]], the science of searching for information in or as documents or databases
* [[Information revolution]], one of the theoretical frameworks within which trends in current society can be conceptualized
* [[Institutional repository]], a digital collection for preserving the intellectual output of an institution
* [[Institutional research]], the collection, analysis, and reporting of institutional data
* [[Instruction register]], part of a CPU's control unit
* [[Intermediate representation]], a computer data structure
* [[Internal router]]

===Other uses in science and technology===
* [[Imaginary number]]s, in mathematics, denoted <math>\text{i}\mathbb{R}</math> or {{math|i'''R'''}} 
* [[Infrared]], a portion of the electromagnetic radiation spectrum
* [[Impulse response]], an output function of a dynamic system presented with a brief input signal
* [[Portable appliance testing#Insulation resistance test|Insulation resistance]], a measure of insulation material performance
* [[Ionizing radiation]]
* [[Iridium]], symbol Ir, a chemical element