For those who want to know how things work, here is a great example of a complex system reduced to simple terms that anyone can understand.
It's a 4 MB wmv file, so dialup users beware.
http://www.klenger.net/humor/Rockwell-Automation.wmv
It's a 4 MB wmv file, so dialup users beware.
http://www.klenger.net/humor/Rockwell-Automation.wmv
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