United Technologies

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United Technologies is a manufacturing powerhouse with six separate companies under its umbrella. Its units offer services like fire safety and products like the near-iconic Otis elevators.Its Pratt & Whitney division, which designs aircraft engines and space propulsion systems, has won some major deals since it introduced a fuel-saving engine design called PurePower that was 20 years in the making. Indian airline IndiGo plans to put the jet engine in 150 of its new Airbus A320neo planes, and Lufthansa is using it for 30 in its fleet, too. —S.D.