The head of the IPCC , Raj Pachauri, is a railroad engineer.

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Hennessy, a professor of electrical engineering and computer science with 23 years at Stanford, is the first engineer to head the institution.

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Sorger hired his friend and electrical engineer Dave Mroz to create a system that would be as reliable as the head and taillights of a car.

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James Braithwaite, Euro-Pro vice president of research and development, says Shark had to "over-engineer" the device's head, which holds the floor cleaning pads, so it would stand up to consumer pressure.

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