ACT and SAT each have their own parts of the country. The GRE has its lock on graduate admissions. And so one could blame the companies but really economically they have no incentive to change things very much because they're getting the business.

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The killer app that got the world ready for appliances was the light bulb. So the light bulb is what wired the world. And they weren't thinking about appliances when they wired the world. They were really thinking about - they weren't putting electricity into the home. They were putting lighting into the home.