UI

Science and technology

• An alternate symbol for the international unit (IU)
• Unit interval (data transmission)
• Universal indicator, a type of pH indicator
• Unit Injector, a fuel injection technology for diesel engines
• Urinary incontinence
• User interaction
• User interface
• Ui (digraph), a digraph used in some writing systems

Education

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

Companies and associations

• The United Illuminating Company
• Eurocypria Airlines, IATA airline designator
• Unix International

Other

• Unemployment Insurance
• Ui (band), an American post-rock band
• United Ireland
• Utility infielder, baseball player
• Ui, an ancient Phoenician colony located at the site of modern-day Tripoli in Libya
• 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!

See also

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