# RI

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> Source: https://en.wikipedia.org/wiki/RI
> Source revision: 1352015106
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{{wiktionary|RI|R.I.|ri|ri-}}
{{wiktionary|rí|rì|rî|-ri}}
'''RI''' or '''ri''' may refer to:
{{tocright}}

==People==
* [Ri](/source/Lee_(Korean_surname)), a common Korean surname, a variant romanization of Lee
* ''[Rí](/source/R%C3%AD)'' (rig), an ancient Gaelic word meaning "king"
* [Ri (pronoun)](/source/Ri_(pronoun)), a gender-neutral pronoun in Esperanto
*''RI'', an initialism of ''[Rex Imperator](/source/Rex_Imperator)'' (king-emperor) or ''Regina Imperatrix'' (queen-empress), used by those British monarchs who were rulers of both the United Kingdom and the Indian Empire

==Places==
* ''[Ri (administrative division)](/source/Ri_(administrative_division))'', an administrative unit in both North Korea and South Korea
* [Ri, Orne](/source/Ri%2C_Orne), a commune of the Orne ''département'' in France
* RI, abbreviation of either the [Republic of Indonesia](/source/Indonesia) or, in the Indonesian language, ''Republik Indonesia''
* [Rhode Island](/source/Rhode_Island), a state within the US (postal abbreviation RI)
* [Rijeka](/source/Rijeka), city in [Croatia](/source/Croatia)

==Arts and media==
* Ri, an augmented second in [solfege](/source/Solfege), used in music education
* Ri, a representation of the second ''[svara](/source/svara)'' in Indian classical music
* [Russia Insider](/source/Russia_Insider), a pro-Kremlin news and propaganda website

==Businesses and organizations==
* [Raffles Institution](/source/Raffles_Institution), a school in Singapore
* [Refugees International](/source/Refugees_International), an international humanitarian organization
* [Rehabilitation International](/source/Rehabilitation_International), an international disability rights organization
* [Rotary International](/source/Rotary_International), international organization of business and professional leaders focused on non-political and non-sectarian humanitarian service
* [Royal Institution](/source/Royal_Institution) of Great Britain, an organisation devoted to scientific education and research
* [Royal Institute of Painters in Water Colours](/source/Royal_Institute_of_Painters_in_Water_Colours), a society in the Federation of British Artists
* [Chicago, Rock Island and Pacific Railroad](/source/Chicago%2C_Rock_Island_and_Pacific_Railroad) (reporting mark RI)
* [Tigerair Mandala](/source/Tigerair_Mandala) (IATA airline designator RI)
* [Italian Radicals](/source/Italian_Radicals), a political party in Italy

==Science, technology, and mathematics==
* [Ri (prefix symbol)](/source/Ri_(prefix_symbol)), a binary unit prefix symbol
* [Reference Intake](/source/Reference_Intake), a food labelling system
* [Referential integrity](/source/Referential_integrity), a database concept
* [Refractive index](/source/Refractive_index) of an optical medium (in physics/optics) is a number that describes how light propagates through that medium
* [Arterial resistivity index](/source/Arterial_resistivity_index), a measure of pulsatile blood flow
* [Ring Indicator](/source/Ring_Indicator), a signal in the RS232 serial communications standard
* [Rhombicosahedron](/source/Rhombicosahedron), a polyhedron, by Bowers acronym
* [Residual income](/source/Residual_income), a financial profitability measure of a company
* [Reputation Institute](/source/Reputation_Institute), a research and insights company that analyzes the reputation of corporations and places
* [Rapid intensification](/source/Rapid_intensification), a phenomenon in which the wind speed of a tropical cyclone increases dramatically in a short period of time
* [Research institute](/source/Research_institute), an establishment founded for doing research

==Other uses==
* [Ri (cuneiform)](/source/Ri_(cuneiform)), a cuneiform sign
* [Ri (kana)](/source/Ri_(kana)), a Romanization of the Japanese kana り and リ
* ''[Ri](/source/Li_(unit))'', a unit of measurement in Japan and Korea related to the Chinese ''li''
*[Rock Island District](/source/Rock_Island_District), a commuter rail line on Chicago's Metra (abbreviated as RI on maps and schedules)

==See also==
{{canned search|ri}}
*{{intitle|ris}}
*{{intitle|ri}}
*[Isaac ben Samuel](/source/Isaac_ben_Samuel), known as the Ri ha-Zaken, a 12th-century French tosafist and Biblical commentator
*[Riri (disambiguation)](/source/Riri_(disambiguation))
*[Ris (disambiguation)](/source/Ris_(disambiguation))
*[IR (disambiguation)](/source/IR_(disambiguation))

{{disambiguation}}

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Adapted from the Wikipedia article [RI](https://en.wikipedia.org/wiki/RI) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/RI?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.