A small boom in office work and desk production occurred at the end of the 19th century and the beginning of the 20th with the introduction of smaller and less expensive electrical presses[further explanation needed] and efficient carbon paper coupled with the general acceptance of the typewriter. Steel desks were introduced to take heavier loads of paper and withstand the pounding meted out on the typewriters. This also gave rise to the "typewriter desk", a platform, sometimes on wheels and with expandable surface via flaps, that was built to a specific height to make typing easier and more comfortable than when using a standard or traditional desk.