I appreciate the responses. I cannot decided if I am beginning to understand how to use them or I am even more confused.

Maybe I should have asked to explain it like I am 5 or like I am in my 80s and don't really understand computers.
Possible example.
My Engineer PC with Wafer Jack TL12, has M Drive 1. So if she has a wafer that has the expert M-drive 3 installed she cannot use it because it uses too much bandwidth, but if she has a wafer, expert M-drive 2 she can and it gives her a +1 to any M-drive checks? Is this mostly correct