In a nutshell, it means the OS's foundation stays untouched, with changes happening around it rather than inside it. While ...

I recently bought an iBook to see what's up with the Objective-C and Cocoa stuff, if I'd like it or not (also I thought it would be nice to get a laptop again).<BR><BR>Last night I was messing around ...

And, Linus Torvalds shaped it and called it Linux, and it was good. Now the operating system was formless and hard to use, so Owen Le Blanc of the Manchester Computing Centre (MCC) said, "Let there be ...