IS

IS may refer to:

Language

• Is, the third-person singular present tense of the English language verb "to be", frequently used as a copula
• Icelandic language (ISO 639-1 alpha-2 code)
• International Sign, a pidgin sign language
• Is (rune) (ᛁ), a rune of the Anglo-Saxon fuþorc

Organisations

• Islamic State of Iraq and the Levant or Islamic State, a militant group and self-proclaimed caliphate
• Intermediate school, education between primary and secondary schools areas
• Ilta-Sanomat, a newspaper in Finland
• Independent Soldiers, a Canadian gang
• Intelligent Systems, a first-party video game developer and internal team of Nintendo
• International Socialists (disambiguation), several Trotskyist political organizations
• Island Airlines (IATA code)
• Interservice, between or among different branches of one nation's armed forces

Places

• Iceland (ISO 3166-1 alpha-2 country code)
• Israel (NATO country code)
• Hīt, or Is, an Iraqi town on the Euphrates River
• Ys or Is, a mythical city of Brittany
• Iaşi County, Romania, (vehicle registration code)
• Inverness TMD, a railway traction maintenance depot (depot code)
• Province of Isernia, Italy (vehicle registration code)

Arts

• Book of Isaiah, a book of the Bible
• is (novel), a novel by Joan Aiken
• i"s, a manga by Masakazu Katsura
• iS (manga), a manga by Chiyo Rokuhana
• Infinite Stratos, a Japanese light novel series
• is (album), a 1969 album by jazz pianist Chick Corea
• is, a 2012 album by Canadian pop band Hey Ocean!

Science and mathematics

• Immune system, organic mechanisms that protect against disease
• Insertion sequence, a short DNA transposable element
• Intersex, an organism with sex characteristics neither exclusively male nor female
• Importance sampling, a statistical technique for estimating properties of a particular distribution
• Infrasound, sound frequencies below the human range of hearing

Technology

• Image stabilization, a family of techniques to reduce blur caused by lens shakes
• Canon Image Stabilizer, a lens-based image stabilization technology by Canon
• Intrinsic safety, a protection technique for electronic equipment in explosive atmospheres
• Indian Standard, developed by the Bureau of Indian Standards, for example the IS 456
• International Standard, a mounting standard for the calipers and rotors of disc-type bicycle brake systems

Computing

• .is, the Internet country-code top-level domain for Iceland
• Information science, the study of data collection, manipulation, and dissemination
• Information systems, organizations of data-processing persons, records, and activities
• InstallShield, a software tool for creating software installers for Microsoft Windows
• IntelliStar, a computer system used to display local forecasts on The Weather Channel

Vehicles and weaponry

• IS tank, a Soviet heavy tank in World War II
• Istrebitel Sputnik or "Fighter Satellite", a Soviet anti-satellite weapon
• Lexus IS, a sports car from Lexus
• Locomotive IS, a Soviet passenger steam locomotive
• Nikitin-Shevchenko IS, a Soviet fighter

Other uses

• Island (Is.), any piece of land surrounded by water
• iS – internal section, a video game developed by Square
• Internal security, the work of keeping domestic peace by a national force
• Investment—Saving, a curve in the IS/LM model
• Is, a fact or empirical state, with finite limits in space and time, in is-ought philosophy

See also

• Independence Square (disambiguation), several public squares around the world
• International System of Units (SI), the modern form of the metric system
• Interstate (disambiguation)
• I (disambiguation)
• Islamic state