A crewman on a United States submarine named Douglas Engelbart realized if a computer could put images on his radar screen, then the same computer could display any information on the same monitor. Before this turning point, computer output was printed on punch cards. This was difficult to understand, only skilled computer operators could undersand even the simplest characters. Now that computer's display information on monitors, anybody can understand them. It's hard to find many specific names to credit all of the advances to because the government has classified it.
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