| Acronym | Definition |
|---|
| TUI | Technical University of Iasi (Romania) |
| TUI | Teachers' Union of Ireland |
| TUI | Touch User Interface |
| TUI | Textual User Interface |
| TUI | Terminal User Interface |
| TUI | Telephony User Interface |
| TUI | Touristik Union International (German travel agency) |
| TUI | Travel University International (San Diego, CA) |
| TUI | Text-based User Interface |
| TUI | Technische Universität Ilmenau (Ilmenau Technical University, Germany) |
| TUI | Talkative User Interface |
| TUI | Time Urgency/Impatience (behavioral health) |
| TUI | Telephone Users Interface (Sprint) |
| TUI | Trans-Uranium Institute |
| TUI | TITAN Users Interface (Telabs) |
| TUI | Technology Unlimited, Inc. (Seattle, WA) |