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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 .
Aadhaar number, originally the Unique Identification Number, ... Unit Identification, an LED used as a means of locating a specific computer server in a server room;
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
Serially Managed - When DoD elects to serially manage an item it becomes "DoD serially managed". This means it is a tangible item used by DoD, which is designated by a DoD, or Service Item Manager to be uniquely tracked, controlled or managed in maintenance, repair and/or supply by means of its serial number.
A personal identification number is critical to protecting financial accounts against fraud and theft. It also helps facilitate secure transactions from almost anywhere in the world.
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