When I first met Amazon founder Jeff Bezos he was still hauling around boxes of books in the truck of his car, and his little company had desks made out of old doors held up with sawhorses. He told me then that Amazon wasn't just about books. "We are going to sell everything," he said.
I thought he was a bit off in the head, to say the least. As it turns out, I was wrong--amazingly wrong. This chart says it all: