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This guy invented Ethernet and built a $2.7 billion company! In 1973, Bob Metcalfe is a young researcher at Xerox with a problem: the office is filling up with personal computers, but there's no way to connect them to a single printer. So Bob writes a solution in a memo, a system that lets machines share one line, all talking over what he calls "the ether." He names it Ethernet and gets it working within months. But Xerox owns it, and they just sit on it, going nowhere. Bob realizes his invention is trapped. So he does something crazy. He quits Xerox, then convinces tech companies to release Ethernet as a free, open standard anyone can use. And then comes the genius move. Bob starts his own company, 3Com, and sells the one thing everyone now needs: the cards that plug computers into Ethernet. He gave away the invention and sold the shovels. The business explodes, goes public, and eventually sells to HP for $2.7 billion.