User
A user is a person who uses a computer or network service. Users generally use a system or a software product without the technical expertise required to fully understand it. Power users use advanced features of programs, though they are not necessarily capable of computer programming and system administration.
A user often has a user account and is identified to the system by a username (or user name). Other terms for username include login name, screen name (or screen name), nickname (or nick) and handle, which is derived from the identical Citizen’s Band radio term.
A user’s account allows a user to authenticate to a system and potentially to receive authorization to access resources provided by or connected to that LAN system; however, authentication does not imply authorization. To log into an account, a user is typically required to authenticate oneself with a password or other credentials for the purposes of accounting, security, logging, and resource management.
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