John writes in with a handy link from his bookmarks- this site shows you how to create a LED display to show all sorts of information about your PC like CPU utilization, memory utilization, network bandwidth, hard drive usage, OS information, program information to monitor CPU, memory, and other resources used by individual threads or processes. I have an old PC with a parallel port and extra drive bay that this would look very sci-fi prop-ish blinking away.
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