Manuals

What computer software do Automotive Repair Shops use to obtain specific vehicle Repair Manuals?

I’m in search of a software that allows me to get unlimited specific vehicle repair manuals and dose not charge by the vehicle(no ALLDATA)?
I didn’t expect it to be free, just looking for something that charges a flat rate and not by the vehicle like ALLDATA dose. Thought i made that clear in my firsrt question but obviously didnt.

Mitchell is the industry standard, but be warned it ain’t cheap

manuals