ok, been searching and searching and cant find anything but domestic sites with explanations of the difference between turbochargers and superchargers

Would really like some questions explained or at least pointed in the right direction (link)

what exactly is A/R, what am I lookin for

maybe an explanation of inducers

flow - lbs/min / cfm, Im guessing this tells you the turbos max boost??? maybe a way to guesstimate lbs min converted to boost

pros and cons to bigger and smaller a/r housings

and finally wheel stages
is this a standard form to all turbos?
what are the differences between a stage 3 and stage 5?

Im pretty sure if I could get this explained I will get the rest no prob.

Once again feel free to hook me up with a link if ya got one, I guess I suck at searching