Hackers and Painters by Paul Graham
Yes, I got this from Slashdot. But this quote is just too good:

I've never liked the term "computer science." The main reason I don't like it is that there's no such thing. Computer science is a grab bag of tenuously related areas thrown together by an accident of history, like Yugoslavia.

And another:

Everyone in the sciences secretly believes that mathematicians are smarter than they are. I think mathematicians also believe this.

I know several mathematicians, and I can just hear them saying "damn right!".