UI

UI or Ui can refer to:

* An alternate symbol for the international unit (IU)
* Eurocypria Airlines, IATA airline designator
* Unemployment Insurance
* United Ireland
* Universal indicator
* Universities Ireland
* Unix International
* Unit Injector, a fuel injection technology for diesel engines
* Urinary incontinence
* User interaction
* User interface
* Ui (digraph), a digraph used in some writing systems
* Ui, an ancient Phoenician colony located at the site of modern-day Tripoli in Libya
* Arturo Ui, a fictional character from "The Resistible Rise of Arturo Ui" by Bertolt Brecht
* Ui (band), an American post-rock band

In education:
* University of Innsbruck
* University of Indonesia
* University of Ibadan, Nigeria
* University of Idaho
* University of Illinois
* University of Iowa

See also

*μ_i, The initial magnetic permeability of a material