In computer displays and graphics, the ratio of the width of
a picture or picture area to its height. For example, an aspect
ratio of 2:1 indicates that the picture is twice as wide as
it is high. The aspect ratio is
In a multiuser or network environment, the process by which
the system validates a user's logon information. A user's name
and password are compared against an authorized list, and, if
the system detects a match, access is granted to the extent
specified in the permission list for that user.
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