The idea of adding wheels and a swivel function to the chair was specifically done to add productivity for clerical workers as it meant they could remain seated but easily get to different locations within their work space. As this saved the time and energy it took to stand up and sit back down repeatedly through the day, it was, and still is, seen as a productive device.
The seat was originally wooden providing a firm base for the employee. The back and arms were slatted and made to provide additional support for the user. Even early office chairs were adjustable as it would add comfort for the worker and perhaps make him want to move from his chair much less, increasing his productivity.
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