UDI

UDI may refer to:

Organisations

 * Independent Democratic Union (Unión Demócrata Independiente), a political party in Chile
 * Union of Democrats and Independents, a political party in France
 * United Defense Industries, a supplier of land warfare systems, now part of BAE Systems Land and Armaments
 * United Diving Instructors, a diver training organization

Technology

 * Uniform Driver Interface, a project to develop portable device drivers
 * Unified Display Interface, digital video interface specification based on DVI
 * Universal Disk Image, a disk image format
 * Unique Device Identification, a system that is intended to assign a unique identifier to medical devices within the United States
 * Unrestricted Digital Information, a type of Circuit Switched Data Bearer Capability service commonly used with GSM cellular networks

Other uses

 * Unilateral declaration of independence, an assertion of the independence of an aspiring state or states
 * Rhodesia's Unilateral Declaration of Independence, in November 1965
 * Mexican unidad de inversión, Mexican currency funds unit
 * Universal design for instruction, an educational framework