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Information Technology Services, a generic name for a computer support department

Intelligent Transportation System, application of IT to transportation

ITS International Talent Support, an international fashion, accessories and photo competition

"it's", a contraction of "it is" or "it has"

Islamic Thinkers Society

Incompatible Timesharing System, a computer operating system

ITS-90, or International Temperature Scale, which provides the defining points for temperature

Improv Tribal Style Belly Dance, a sub-genre of Tribal Style Belly Dance

In the Shadows, a song by Finnish band The Rasmus

International Tracing Service

Intelligent tutoring system, an artificial intelligence system used for tutoring

Internationalization Tag Set, a W3C recommendation for internationalizing XML

Internet technical support, the people you call to repair your Internet connection

"its", the possessive adjective and possessive pronoun form of the personal pronoun it

Issue tracking system, computer software packages that manage and maintain lists of issues, as needed by an organization

The "It's" man, a man with torn clothes and unkempt beard who appeared at the beginning of episodes of Monty Python's Flying Circus

International Thespian Society, an honorary organization for high school and middle school theatre students

Integrated/Embedded Mission Training Systems by Simlat

Internal transcribed spacer, a section of DNA located within a set of ribosomal genes

International Typographic Style, a graphic design style developed in Switzerland in the 1950s

Institute of Technology, Sligo, Ireland

Instructional Technology Specialist, a person who works with teachers and students to help them integrate instructional or educational technology into teaching and learning environments

Institut Teknologi Sepuluh Nopember, in Surabaya, Indonesia

Identity, Tradition, Sovereignty, a former political grouping in the European Parliament

Integrated Truss Structure, a component of the International Space Station