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Unique identifier. A unique identifier (UID) is an identifier that is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. [1] The concept was formalized early in the development of computer science and information systems. In general, it was associated with an atomic data type.
A Universally Unique Identifier (UUID) is a 128-bit label used for information in computer systems. The term Globally Unique Identifier (GUID) is also used, mostly in Microsoft systems. [1][2] When generated according to the standard methods, UUIDs are, for practical purposes, unique. Their uniqueness does not depend on a central registration ...
User identifier. Unix-like operating systems identify a user by a value called a user identifier, often abbreviated to user ID or UID. The UID, along with the group identifier (GID) and other access control criteria, is used to determine which system resources a user can access. The password file maps textual user names to UIDs.
UID-marking is a set of data for assets that is globally unique and unambiguous. The technology used to mark an item is 2D Data Matrix ECC 200 Symbol. UID marking can be used to ensure data integrity and data quality throughout an item's lifecycle; it also supports multi-faceted business applications. As per the memorandum issued by the ...
Aadhaar (Hindi: आधार, lit.'base, foundation') [ 7 ] is a twelve-digit unique identity number that can be obtained voluntarily by all residents of India, based on their biometrics and demographic data. [ 8 ] The data is collected by the Unique Identification Authority of India (UIDAI), a statutory authority established in January 2016 by ...
In computing. Unique identifier for a specific user of a computer system. Unique ID for the Mifare series of chips (integrated circuits) used in contactless smart cards and proximity cards. Unique ID of a message in a folder on an IMAP server. User identifier (Unix), a code identifying each user on a Unix and Unix-like systems.
A value-added tax identification number or VAT identification number (VATIN[1]) is an identifier used in many countries, including the countries of the European Union, for value-added tax purposes. In the EU, a VAT identification number can be verified online at the EU's official VIES [2] website. It confirms that the number is currently ...
Security Identifier. In the context of the Microsoft Windows NT line of operating systems, a Security Identifier (SID) is a unique, immutable identifier of a user, user group, or other security principal. A security principal has a single SID for life (in a given domain), and all properties of the principal, including its name, are associated ...