What is Mac OS X?

As many of you will know, I recently bought an iBook (for those that don’t know, it’s an Apple Macintosh notebook). I must say, I love it.

Today I found this article that describes what exactly Mac OS X is (the operating system that makes a mac so great) and why the author prefers it over other operating systems (in some cases):
What is Mac OS X?:

This document attempts to give a hacker over-friendly answer to the question “What is Mac OS X?”. My original motivation in writing this was that somebody had proxy-volunteered me to give a talk introducing Mac OS X to the Linux Users Group at my work place. While thinking over what to say to those folks, most (if not all) of whom are strangers to Mac OS X, I decided to write a supplementary document that they could refer to at their leisure.