UDI
# 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
