I found this cool site that explains rather well the different types of superchargers and the turbocharger. This explaination is not in depth, but it does do a nice job of trying to get you to understand.

Click Here (http://www.sandsautomotive.com/whipple/superchargers/turbochargers.html)

very good linky but theres a even better one up in the F/I area but good job spreading some info its much needed here