UID

• Unique Identification Number later renamed as Aadhaar number, an initiative of Unique Identification Authority of India of the Indian government to create a unique ID for every Indian resident.
• UID = VAT identification number (in German language) (VAT: Value added tax)
• Ulster Institute for the Deaf
• Umeå Institute of Design
• Universal Instructional Design, an educational method that tries to deliver teaching to meet the needs of wide variety of learners.
• Unintelligent Design, a satirical reaction to the Intelligent Design movement
• Unique identifier
• PubMed 'Unique Identifier' parameter designating specific scientific publication abstracts; see: PMID
• 'Unique Item Identifier', a specific value in the Item Unique Identification system used by the United States Department of Defense for the identification of accountable equipment according to DoD Instruction 5000.64

In computing

• A Unique identifier
• Unique identifier for a specific User of a computer system
• Unique ID of a message in a folder on an IMAP server
• See also Globally unique identifier (GUID)
• See also Universally unique identifier (UUID)
• User identifier , a code identifying each user on a Unix and Unix-like systems
• User interface design, device design with the focus on the user's experience and interaction
• 'Unit IDentification light', a light found on all HP/Compaq DL servers that allows users to distinguish which server they are working on in a server...... ...
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