Job Spetter dresses for work the way any 24-year-old might dress for a Saturday afternoon: jeans, T shirt, sneakers. But Spetter works on car engines in Westchester County, New York. When he has finished adding a couple of hundred horsepower to a Ford Mustang, his eyes may be a little glazed, but his shirt is spotless and his fingernails are grease-free. Instead of tearing apart a carburetor or a transmission, Spetter plugs his laptop into the car's computer. "I don't like getting dirty," he says. "I just fly in with my laptop for a few hours and move on."
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