I have a fair knowledge on the o/s available.But I am curious to know whats are non-technical differences between linux and unix, like why does unix cost while linux is free and what was to need to emulate unix as linux and also some superficial technical details.BTW a comprehensive list of all the o/s available along with their manafacturers and the type(Open source/paid) would be of great help.
I know a quick google would do all this but then I am too lazy for that