| UDT | Ultimate Diesel Tuning 
| Others |
| UDT | Ultimate Dream Teams
| Others |
| UDT | Ultra Duty Truck
| Others |
| UDT | Un Designated Tiger
| Others |
| UDT | Un Detected Testis
| Others |
| UDT | Un Deux Trois
| Others |
| UDT | Un Dos Tres
| Others |
| UDT | Un-armed Defensive Tactic
| Others |
| UDT | Unarmed Defensive Tactics
| Others |
| UDT | UnDefined Term
| Others |
| UDT | Under Declaration of Trust
| Others |
| UDT | Underwater Demolition Team
| Others |
| UDT | Underwater Demolition Teams
| Others |
| UDT | Underwater Demolitions Team
| Others |
| UDT | Uniao Democratica Timorense
| Others |
| UDT | Uniform Data Transfer
| Others |
| UDT | United Data
| Others |
| UDT | United Data Technologies
| Others |
| UDT | United Deliverance Temple
| Others |
| UDT | United Dominions Trust
| Others |
| UDT | Universal Data Transfer
| Others |
| UDT | Universal Deformation Technology
| Others |
| UDT | Universal Dependency Treebank
| Others |
| UDT | Universal Design Theory
| Others |
| UDT | Universal Device Tracker
| Others |
| UDT | Universal Display Timer
| Others |
| UDT | Universal Diver Training
| Others |
| UDT | Universal Dynamic Tractor
| Others |
| UDT | Unlimited Diesel Truck
| Others |
| UDT | Unreliable Data Transfer
| Others |
| UDT | Unstructured Data Transfer
| Others |
| UDT | Updateless decision theory
| Others |
| UDT | Upper Division Transfer
| Others |
| UDT | Urine Drug Test
| Others |
| UDT | Urine Drug Testing
| Others |
| UDT | Uro Dynamic Testing
| Others |
| UDT | USANT dance troupe
| Others |
| UDT | User Data Type
| Others |
| UDT | User Definable Drive Types
| Others |
| UDT | User Defined Table
| Others |
| UDT | User Defined Tempo
| Others |
| UDT | User Defined Type
| Others |
| UDT | User Defined Types
| Others |
| UDT | User Design Team
| Others |
| UDT | User Device Tracker
| Others |
| UDT | User Documentation Team
| Others |
| UDT | User-Defined Tempo
| Others |
| UDT | UTEP Dinner Theatre
| Others |
| UDT | UTEP Dinner Theatre's
| Others |
| UDT | Utility Dog Title with a Tracking Dog Title
| Others |