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The Internet
It really needs no introduction: The global system of interconnected computer networks known as the Internet is used by billions of people worldwide. Countless people helped develop it, but the person most often credited with its invention is the computer scientist Lawrence Roberts. In the 1960s, a team of computer scientists working for the U.S. Defense Department’s ARPA built a communications network to connect the computers in the agency, called ARPANET. It used a method of data transmission called “packet switching” which Roberts, a member of the team, developed based on prior work of other computer scientists. ARPANET was the predecessor of the Internet.
