UI

Arts and entertainment

• Ui (band), an American post-rock band
• Ui Miyazaki (born 1981), Japanese voice actor
• Arturo Ui, a fictional character from The Resistible Rise of Arturo Ui by Bertolt Brecht
• Ui Hirasawa, a fictional character in the anime and manga series K-On!

Businesses and organizations

Universities

• University of Ibadan, in Ibadan, Nigeria
• University of Iceland, in Reykjavík, Iceland
• University of Idaho, in Moscow, Idaho, US
• University of Illinois, in Urbana-Champaign, Illinois, US
• University of Indonesia, in Depok, Indonesia
• University of Innsbruck, in Innsbruck, Austria
• University of Iowa, in Iowa City, Iowa, US
• Universities Ireland
• University of Isfahan, in Isfahan, Iran

Other businesses and organizations

• The United Illuminating Company, a regional electric distribution company in the northeastern US
• Eurocypria Airlines (IATA airline designator UI)
• Unix International, an association created in 1988 to promote open standards, especially the Unix operating system

Science and technology

Computing

• Unit interval (data transmission), also called pulse time or signal duration time
• User interaction, or human–computer interaction, in computer science and behavioral science
• User interface, an industrial design field of human–machine interaction

Other uses in science and technology

• International unit (typically abbreviated IU), typically used in medicine and pharmacology
• Unit injector, a fuel injection technology for diesel engines
• Universal indicator, a type of pH indicator
• Urinary incontinence, a condition defined by leakage of urine

Other uses

• Ui, an ancient Phoenician colony located at the site of modern-day Tripoli in Libya
• Ui (digraph), a digraph used in some writing systems
• Unemployment insurance
• United Ireland, a proposed sovereign state covering all thirty-two traditional counties of Ireland
• Utility infielder, a baseball position

See also

• U1 (disambiguation)
• μ_i, The initial magnetic permeability of a material