High Quality Content by WIKIPEDIA articles! Clear is a standard Unix computer operating system command which is used to clear the screen. Depending on the system, clear uses the terminfo or termcap database, as well as looking into the environment for the terminal type in order to deduce how to clear the screen. The Unix command clear takes no arguments and is roughly analogous to the MS-DOS command cls. Unix (officially trademarked as UNIX, sometimes also written as Unix with small caps) is a computer operating system originally developed in 1969 by a group of AT

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