What does a monopoly look like? In 2009, you can get a pretty good idea by looking at Apple’s iTunes Music Store (iTMS). It has overwhelming market share with a hockey-stick growth trajectory, is designed to work exclusively with the enormously profitable iPod/iPhone family of hardware devices (another near-monopoly), and appears to be immune from pricing pressure. Having a monopoly isn’t illegal, unless a court or governmental agency rules that you’re trying to abuse the monopoly position (just ask Microsoft). In fact, if you can stay on the right side of the antitrust regulators, having a monopoly is like a license to print profits.