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In Unix systems, the username is correlated with a user identifier or user ID. Computer systems operate in one of two types based on what kind of users they have: Single-user systems do not have a concept of several user accounts. Multi-user systems have such a concept, and require users to identify themselves before using the system.
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.
A Primary username is the name you created when you first signed up for an AOL account. In the past, AOL offered the ability to create secondary usernames linked to this Primary username, however, as of November 30, 2017, the ability to add or manage additional usernames has been removed.
Microsoft account logo. A Microsoft account or MSA (previously known as Microsoft Passport,.NET Passport, and Windows Live ID) is a single sign-on personal user account for Microsoft customers to log in to consumer Microsoft services (like Outlook.com), devices running on one of Microsoft's current operating systems (e.g. Microsoft Windows computers and tablets, Xbox consoles), and Microsoft ...
user.name+tag+sorting@example.com (may be routed to user.name@example.com inbox depending on mail server) name/surname@example.com (slashes are a printable character, and allowed) admin@example (local domain name with no TLD, although ICANN highly discourages dotless email addresses) example@s.example (see the List of Internet top-level domains)
Registered users normally provide some sort of credentials (such as a username or e-mail address, and a password) to the system in order to prove their identity: this is known as logging in. Systems intended for use by the general public often allow any user to register simply by selecting a register or sign up function and providing these ...
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. The concept was formalized early in the development of computer science and information systems.
Authentication – After becoming a subscriber, the user receives an authenticator e.g., a token and credentials, such as a user name. He or she is then permitted to perform online transactions within an authenticated session with a relying party, where they must provide proof that he or she possesses one or more authenticators.