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A group identifier, often abbreviated to GID, is a numeric value used to represent a specific group. [1] The range of values for a GID varies amongst different systems; at the very least, a GID can be between 0 and 32,767, with one restriction: the login group for the superuser must have GID 0.
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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 with the SID.
Effective June 2011, the US military has introduced a plan to eliminate the use of Social Security Numbers on military and dependent ID cards and replace them with a service number, in an effort to prevent identity theft against members of the armed services. [7] All members have now been issued a DoD ID number for this purpose. [7]
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 manipulations of the Rubik's Cube form the Rubik's Cube group.. In mathematics, a group is a set with an operation that associates an element of the set to every pair of elements of the set (as does every binary operation) and satisfies the following constraints: the operation is associative, it has an identity element, and every element of the set has an inverse element.
The Social Security number is a nine-digit number in the format "AAA-GG-SSSS". [35] The number has three parts: the first three digits, called the area number because they were formerly assigned by geographical region; the middle two digits, the group number; and the last four digits, the serial number.
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