There’s more than one way to divide a pizza. There’s the familiar method of cutting it into slices, of course, but you could also divide it into layers of toppings, cheese, sauce, and crust, or—theoretically—distill it into its basic ingredients of flour, water, tomatoes, garlic, and milk. The way you think about dividing that pizza will depend on what you plan to do with it.
The same holds true for Mac OS X. You can look at it and take it apart any number of ways, each of which contributes to your understanding of the OS. Taking apart and examining the components of Mac OS X is the subject of this chapter.