Dose Anyone Know A List Of CBS Longest Running Comedy Series Ever?
i know alot of there shows were on for a long time the most are usually from 7 to 11 years

http://en.wikipedia.org/wiki/List_of_programs_broadcast_by_CBS#Sitcom_2

That's an extremely incomplete list of sitcoms formerly broadcast by CBS. A lot a missing, but there's also a lot listed, so that should get you started.