When product designer Bill Stumpf was asked by Herman Miller to develop ergonomic seating for the 1990s workplace, he began by watching people at work. What he saw was pandemonium. Personal computers had freed employees to assume any position. They’d lean forward, squinting at the screen, or kick back, keyboards in their laps. With materials expert Don Chadwick, Stumpf built a chair as flexible as the restless startup worker.

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