Ajit Pai @AjitPai
OTD in 1938, Chester Carlson and Otto Kornei put a glass slide with writing on it on a zinc plate coated with sulfur and exposed it to light. They then managed to transfer the image to wax paper. It was the 1st photocopy—a process Carlson called "xerography," which led to @Xerox. https://t.co/sl7uHkIXOP — PolitiTweet.org