| Acronym | Definition |
|---|
| UDT➣Urzad Dozoru Technicznego (Polish: Office of Technical Inspection) |
| UDT➣User Defined Type |
| UDT➣Underwater Demolition Team (US Navy SEALs) |
| UDT➣Undersea Defence Technology (conference) |
| UDT➣User Data Type |
| UDT➣User Definable Drive Types |
| UDT➣Universal Data Transfer |
| UDT➣Uniform Data Transfer |
| UDT➣Unstructured Data Transfer |
| UDT➣User-Defined Table |
| UDT➣União Democrática Timorense (Timor Democratic Union, East Timor) |
| UDT➣Upper Dublin Township (Pennsylvania) |
| UDT➣Uniform Data Transfer (COM-based technologies) |
| UDT➣Urine Drug Test |
| UDT➣User Data Type (Microsoft) |
| UDT➣Undescended Testicles |
| UDT➣Uro Dynamic Testing |
| UDT➣Utility Dog Tracker (AKC title) |
| UDT➣Union des Travailleurs (French: Union Workers) |
| UDT➣User Documentation Team (Joomla) |
| UDT➣Unit Data Message (SS7) |
| UDT➣Unarmed Drill Team |
| UDT➣United Dominions Trust Ltd (UK) |
| UDT➣Universal Data Translator (modeling and simulation) |
| UDT➣Ujian Darjah Tiga (Malaysia) |
| UDT➣Under Declaration of Trust |
| UDT➣User Defined Tools |
| UDT➣Under Deck Tonnage |
| UDT➣Underage Drinking Taskforce |
| UDT➣Unstructured Data Structure |
| UDT➣User Design Team |
| UDT➣Uridine Diphosphate-N-Acetylgulucosamine Transferase |
| UDT➣U Die Today (gaming clan) |
| UDT➣UDP (User Datagram Protocol)-Based Data Transfer (computer networking) |
| UDT➣User-Defined Training (certification training) |