Unrestricted Digital Information
Unidentified Drunken Injury
Unilateral Declaration of Independence
Urban Development Institute
Utility Data Institute
Mexican Unidades De Inversion Udi
Unapproved Data Item
unexpected death in infancy
Unidentified drinking injury
Unified Display Interface
Uniform Driver Interface
unique data item
Unique Delivery Identifier
UNITED DOMINION INDUSTRIES LTD.
Universal Debug Interface
Universal Digital Indicator
Universal Document Identifier
Urogenital Distress Inventory
User Defined Interface
Universal Declaration of Independence