IV

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 Austrian Industries (‹See Tfd›German: Industrievereinigung)
• Irish Volunteers, a military organization
• Italia Viva, an Italian centrist political party

Music

• Subdominant, 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, a country in West Africa
• IV postcode area, north Scotland
• Isla Vista, California, United States

In science, technology and mathematics

• Intravenous therapy, 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

See also

• 4 (disambiguation)