| UI | A Up And In 
| Others |
| UI | Ariel ( Uranus satellite number 1)
| Others |
| UI | Eurocypria Airlines
| Others |
| UI | Geoworks U I Compiler Espire language source code file
| Others |
| UI | The United Islands
| Others |
| UI | Ui Is
| Others |
| UI | Ultraviolet Imaging
| Others |
| UI | Umbrella, Inc.
| Others |
| UI | Un Insured
| Others |
| UI | Unauthorized Information
| Others |
| UI | Undergraduate Institution
| Others |
| UI | Unemployment Insurance
| Others |
| UI | Unidentified Individual
| Others |
| UI | Uniform Interface
| Others |
| UI | Union Initiative
| Others |
| UI | Union Institute
| Others |
| UI | Unit Impulse
| Others |
| UI | Unit Injector
| Others |
| UI | Unit International
| Others |
| UI | Unit Interval
| Others |
| UI | Unit of Issue
| Others |
| UI | United Illuminating
| Others |
| UI | United Inches
| Others |
| UI | Universal Indicator
| Others |
| UI | Universal Interface
| Others |
| UI | Universitas Indonesia
| Others |
| UI | Universities and Industries
| Others |
| UI | Universities Ireland
| Others |
| UI | University And Industry
| Others |
| UI | University Industry
| Others |
| UI | University of Ibadan
| Others |
| UI | University of Iceland
| Others |
| UI | University of Idaho
| Others |
| UI | University of Illinois
| Others |
| UI | University of Incheon
| Others |
| UI | University of Innsbruck
| Others |
| UI | University of Iowa
| Others |
| UI | University of Isfahan
| Others |
| UI | Unix International
| Others |
| UI | Unnumbered Information
| Others |
| UI | Unnumbered Information (frame)
| Others |
| UI | Unofficial International
| Others |
| UI | Unreported Income
| Others |
| UI | Unsigned Index
| Others |
| UI | Unsigned Integer
| Others |
| UI | Urban Institute
| Others |
| UI | Urinary Incontinence
| Others |
| UI | User If
| Others |
| UI | User Infrastructure
| Others |
| UI | User Instructions
| Others |
| UI | User Interface
| Others |
| UI | User interface (Sprint)
| Others |
| UI | Utility Infielder
| Others |
| UI | UX Design
| Others |
| UI | UX designer
| Others |
| UI | yoU and I
| Others |
| UI | yoU Idiot
| Others |