UI, Ui, or ui may refer to:
Arts and entertainment Ui (band), an American post-rock band UI (film), an Indian Kannada-language film released in 2024 Upin & Ipin, in which the abbrebiation 'UI' shows in the episode Selamatkan Neo Santara Ui Hirasawa, a character from the manga series K-On! Ui Miyazaki (born 1981), Japanese voice actress Ui Shigure, Japanese illustrator Arturo Ui, a fictional character from The Resistible Rise of Arturo Ui by Bertolt Brecht Youichi Ui (born 1972), Japanese motorcycle road racer Manami Ui (born 1986), Japanese model
Businesses and organizations Universities University of Ibadan, Nigeria University of Iceland University of Idaho, US University of Illinois, US University of Iloilo, Philippines University of Indonesia University of Innsbruck, Austria University of Iowa, US Universities Ireland, Northern Ireland University of 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) Ubiquiti, an American technology company Unix International, an open-standard association
Science, technology, and mathematics Computing Unit interval (data transmission), also pulse time or signal duration time User interface, between human and machine
Other uses in science, technology, and mathematics Unité internationale, French for International unit, typically used for medication dose Unit injector for diesel engines Urinary incontinence
Other uses Ui (digraph), used in some writing systems Unauthorised information; see Glossary of contract bridge terms#unauth Unemployment insurance United Ireland, a proposed state Universitas Indonesia railway station at the University of Indonesia
See also U1 (disambiguation) μi, the initial magnetic permeability of a material