IV may refer to:

Businesses and organizations

In the United States

Immigration Voice Immigration Voice is a 501(c)(4) nonprofit organization advocating to alleviate problems faced by high-skilled immigrant workers in the United States, through the legislative branch of congress. History Immigration Voice is a 501(c)(4) Nonpro ...

, an activist organization * Intellectual Ventures, a privately held intellectual property company * InterVarsity Christian Fellowship

Elsewhere

* Federation of Austrian Industries () * Irish Volunteers, a military organization * Italia Viva, an Italian centrist political party

Music

Subdominant In music, the subdominant is the fourth tonal degree () of the diatonic scale. It is so called because it is the same distance ''below'' the tonic as the dominant is ''above'' the tonicin other words, the tonic is the dominant of the subdomina ...

, in music theory

Recordings

* ''IV'' (The Aggrolites album), 2009 * ''IV'' (Angband album), 2020 * ''IV'' (BadBadNotGood album), 2016 * ''IV'' (Black Mountain album), 2016 * ''IV'' (Cypress Hill album), 1998 * ''IV'' (Diamond Rio album), 1996 * ''IV'' (Goatsnake album), 1998 * ''IV'' (Godsmack album), 2006 * ''IV'' (Hiroyuki Sawano album), 2021 * ''I.V.'' (Loma Prieta album), 2012 * ''IV'' (Maylene and the Sons of Disaster album), 2011 * ''IV'' (Ton Steine Scherben album), 1981 * ''IV'' (The Stranglers album), 1980 * ''IV'' (To/Die/For album), 2004 * ''IV'' (Veruca Salt album), 2006 * ''IV'' (Winger album), 2006 * ''IV'' (Željko Joksimović album), 2005 *'' Faust IV'', 1973 *'' Good Apollo, I'm Burning Star IV, Volume One: From Fear Through the Eyes of Madness'', by Coheed and Cambria, 2005 *'' Led Zeppelin IV'', 1971 *'' Toto IV'', 1982 * ''IV'' (EP), a 2013 EP by The 1975 * "I.V." (song), by X Japan, 2008 * ''IV'', 1998 album by Siam Shade *''IV'', a 1990 EP by The Lookouts

Places

Ivory Coast Ivory Coast, also known as Côte d'Ivoire and officially the Republic of Côte d'Ivoire, is a country on the southern coast of West Africa. Its capital city of Yamoussoukro is located in the centre of the country, while its largest List of ci ...

, a country in West Africa *

IV postcode area IV may refer to: Businesses and organizations In the United States *Immigration Voice, an activist organization *Intellectual Ventures, a privately held intellectual property company *InterVarsity Christian Fellowship Elsewhere *Federation of Aus ...

, north Scotland * Isla Vista, California, United States

In science, technology and mathematics

Intravenous therapy Intravenous therapy (abbreviated as IV therapy) is a medical technique that administers fluids, medications and nutrients directly into a person's vein. The intravenous route of administration is commonly used for rehydration or to provide nutr ...

, a route of administration of a drug * I–V curve, current–voltage curve characteristic * Implied volatility, a term in financial mathematics * Independent variable, in mathematical and statistical modeling * Independent verification systems, in voting machines * Induction variable, in computer science * Initialization vector, in cryptography * Instrumental variable, in statistics * Intrinsic viscosity * Trochlear nerve, the fourth cranial nerve

Other uses

* 4 (number) in Roman numerals * Four-Phase Systems, a computer company whose logo was a stylized "IV" *'' International Viewpoint'', an online magazine of the Trotskyist reunified Fourth International * Inter vivos trust, a legal instrument * Coleman Williams, American country music singer known professionally as IV