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From the time he was a child, Jeffrey showed a prodigious mechanical aptitude—from asserting his independence as a toddler by dismantling his crib with a screwdriver to rigging an electric alarm and spending summers on the ranch working at the enormously varied tasks essential to the operation. At Princeton University, he studied physics but ultimately chose computer science.*
*Jeffrey had no formal training in computer programming, but he learned quickly by watching his father and by reading books on the subject.
