History about OS X

Some history of Mac OS X, now you know why OSX is using Mach Kernel, BSD services and Objective C, is just all about NeXT and Nextstep. The history talk about the Pink OS, join venture by IBM and Apple, it used to call Taligent Software which I think many people have forgotten, it was one of the greatest vapourware. Writing a operating system is not easy, even though there are so many talented programmer out there, many of the 'do it right' OS, came from DEC, MS, Apple(BeOS, Nextstep), IBM... Apple computer have spend quite some money(USD 427 million) on NeXT, but Apple is doing a right move, OS X is a great OS especially for Apple itself.