"Nobody ever got fired for buying IBM." That chestnut has morphed from sales proposition to object lesson on the perils of clinging to convention in less than a generation. We've ditched the dark suits and "sincere" ties of our father's IBM for black turtlenecks and jeans, and we've embraced the "think different" ethos of Apple's celebrated campaign : "Here's to the crazy ones. The misfits, the rebels, the troublemakers, the round pegs in square holes. The ones who see things differently."