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<p>A <b>front panel</b> was used on early electronic computers to display and allow the alteration of the state of the machine's internal <a href="page.php?w=CPU_register">registers</a> and <a href="page.php?w=computer_memory">memory</a>. The front panel usually consisted of arrays of <a href="page.php?w=electric_light">indicator lamps</a>, digit and symbol displays, <a href="page.php?w=toggle_switch">toggle switch</a>es, dials, and <a href="page.php?w=push-button">push buttons</a> mounted on a sheet metal face plate. In early machines, <a href="page.php?w=Cathode-ray_tube">CRT</a>s</p><p>
<a accesskey="3" href="page.php?w=front_panel&amp;p=2">3.Next</a>
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