IS

The word "is" constitutes the third-person singular form of "to be", copula of the English language.

Abbreviations

As a two-letter abbreviation, "IS", "Is", or "is" may refer to:
*Image stabilization, a family of techniques to reduce blur caused by lens shakes
*Immune system, organic mechanisms that protect against disease
*Independence Square, any of several public squares around the world
*Independent Soldiers, a Canadian gang
*Information science, the study of data collection, manipulation, and dissemination
*Information system, an organization of data-processing persons, records, and activities
*Insertion sequence, a short DNA transposable element
*Intelligent Sport, the Lexus IS compact-sized sedan made by Toyota
*Intelligent Systems, a first-party videogame developer and internal team of Nintendo
*IntelliStar, a computer system used to display local forecasts on The Weather Channel
*Intermediate school, education between primary and secondary
*Internal security, the work of keeping domestic peace by a national force
*International Sign, considered a pidgin sign language
*International Socialists, any of several Trotskyist political organizations
*Internet slang, slang terms used on the Internet and in text and instant messages
*Interservice, between or among different branches of one nation's armed forces
*Intersexual, an organism with sex characteristics neither exclusively male nor female
**"IS", a manga about intersexuals by Chiyo Rokuhana
*Interstate, between states, in any of several meanings
*Intrinsic safety, a protection technique for electronic equipment in explosive atmospheres
*Investment/Saving equilibrium, a curve in the Keynesian IS/LM economic model
*Iosif Stalin or Joseph Stalin, General Secretary of the Soviet Union, and namesakes:
**IS tank, a Soviet heavy tank in World War II
**Locomotive IS, a Soviet passenger steam locomotive
*Isaiah, a prophet of the Bible, and namesake:
**The Book of Isaiah, a book of the Bible
*Island, or isle, an isolated piece of land surrounded by water
*Ísland or Iceland (ISO 3166-1 alpha-2), a North Atlantic nation
**".is", Iceland's top-level Internet domain
*Island Airlines (IATA reservation code), an American aviation firm merged into Air BC
*Íslenska or Icelandic (ISO 639-1 alpha-2), the language of Iceland
*Israel (NATO country code), a Middle Eastern nation
*Istrebitel Sputnikov or interceptor of satellites, a Russian anti-satellite weapon

Words

Other words formed from the letters "is" include:
*"is" (plural "ises"), anything factual, empirical, actual, or spatiotemporal, in is-ought philosophy
*"is", the Anglo-Saxon form of the rune Isaz
*Is or I's, plural of any of several meanings of "I", particularly:
**I formations in American football
**Incompletes, scores used in academic grading in North America
**Ones in Roman numerals
**Particular affirmative premises in syllogistic logic, the third premise form coded by a vowel
**Selves known by the pronoun "I"
*Is or Hīt, an Iraqi town on the Euphrates
*Is or Ys (also Ker-Ys or Ville d'Is), a mythical city of 5th-century Brittany
*"is-" (Greek "isos"), a prefix similar to "iso-", meaning equal, homogeneous, or uniform
*"I"s", a manga by Masakazu Katsura with main characters Ichitaka and Iori
*$i,$s, imaginary units in the complex number system
*$\{hat\{imath$s, unit vectors along the x-axis

ee also

*E-Prime, a modified English syntax and vocabulary lacking all forms of "to be"
*Klingon language, a fictional language in the Star Trek universe lacking the verb "to be"
*Orang Asli, a Malaysian people whose language lacks the verb "to be"
*Sioux languages, some of which lack the verb "to be"
*Lexus IS a performance sedan from Lexus