UID
UID stands for:
- User Identifier - engl. for user ID, the identifier of a user account
- Unit IDentifier in cryptography, see Unit IDentifier ( cryptography)
- Unique Identifier, a taxonomic definition of the U.S. Department of Defense for the identification of objects of all kinds, see Unique Identifier ( DOD)
- User Interface Design, Interface Design between man and machine, see Interface Design
UID-Nr. stands for:
- Sales tax identification number in Austria ( acronym in Germany: " VAT Reg. ").
- Company identification number in Switzerland
- Disambiguation
- Abbreviation