Acronyms and Initialisms
- TUI AG (Touristik Union International), German tour operator
- Touro University International, aka TUI University
- Text-based user interface, a retronym coined after the invention of Graphical User Interfaces, to distinguish them from text-based user interfaces
- Telephone User Interface, a type of Voice User Interface (interaction with computers using voice) applied to telephony technology
- Tangible User Interface, a user interface in which a person interacts with digital information through the physical environment
- Touch User Interface, a computer-pointing technology based upon the sense of touch (haptics)
- Turaif Domestic Airport (IATA code: TUI), a public airport in Turaif, Saudi Arabia
- Teachers' Union of Ireland
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