SYSTAT or Systat may refer to
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SYSTAT (statistics package), a statistics and statistical graphics software package
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SYSTAT (DEC), a command on the DEC TOPS-10 and RSTS/E computer operating systems
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sysstat, a command-line tool that displays active processes and users
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systat (BSD), a BSD UNIX command-line tool to display system statistics in a full-screen view using ncurses/curses
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systat (protocol) (or Active Users), an Internet protocol
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