Ajit Pai @AjitPai
OTD in 1970, Douglas Engelbart received Patent No. 3,541,541 for an "X-Y position indicator control for movement by the hand over any surface to move a cursor over the display on a cathode ray tube"—or, as better known years later, a computer mouse. https://t.co/FjSujQWnWu https://t.co/qNSfhLkTn5 — PolitiTweet.org