clear - clear terminal screen
clear clears the terminal screen if it is possible to do so. It reads
the TERM environment variable for the terminal type, then reads the
appropriate terminfo database to determine how to clear the screen.
/usr/share/lib/terminfo/?/* terminal database files
clear was developed by the University of California, Berkeley.
Hewlett-Packard Company - 1 - HP-UX Release 11i: November 2000