A golf ball-sized element used in typewriters and low-speed teleprinters that contains all the print characters on its outside surface. It was introduced with IBM's Selectric typewriter.
"type ball." YourDictionary, n.d. Web. 21 June 2018. <http://www.yourdictionary.com/type-ball>.
type ball. (n.d.). Retrieved June 21st, 2018, from http://www.yourdictionary.com/type-ball
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