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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 .
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. UIDs are stored in the inodes of the Unix file system , running processes, tar archives, and the now-obsolete Network Information Service.
This number would be equivalent to generating 1 billion UUIDs per second for about 86 years. A file containing this many UUIDs, at 16 bytes per UUID, would be about 43.4 exabytes (37.7 EiB ). The smallest number of version-4 UUIDs which must be generated for the probability of finding a collision to be p is approximated by the formula
Aadhaar number, originally the Unique Identification Number, an initiative of the Unique Identification Authority of India (UIDAI) of the Indian government to create a unique ID for every Indian resident; uID Center, a nonprofit organization in Tokyo, Japan, responsible for the Ucode system for uniquely identifying real-world objects electronically
On 28 January 2009, the Indian Government established an Authority called the Unique Identification Authority of India (UIDAI) to issue a Unique Identification Number to all residents of India. It is the biggest biometric ID programme in the world due to the large population of India. [20]
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All the items and properties either owned by or in the contract with the [DoD], and that meet the criteria, need to be identified with a unique serialized identification number and for them UID Compliance standard is obligatory. This identification number is very essential for meeting the MIL STD 130 standards.
Unique identifier (UID) or (UII), also referred as Item Unique Identification (IUID) in the DoD terminology, marks qualifying tangible items in the form of a number, character string, or sequence of bits assigned to a separate entity or its relevant attribute that uniquely distinguish it from other entities. The construction rules depend upon ...