A PC, otherwise known as a Personal Computer, is that beige box your monitor is hooked to. To hook a PC or a laptop or even a Palm Pilot to the Operator Interface, you can connect it via one of the included 9-pin serial cables to the Dashboard Port. Using a dashboard viewer, downloadable from many sources including
InnovationFIRST . There are various dashboard viewers, and some people have written their own. I'm sure somebody will elaborate on the other programs...