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The Internet developed from ARPANET, an experimental computer network established in the 1960s by the U.S. Department of Defense. By the late 1980s, the Internet was being used by many government and educational institutions.

The World Wide Web was the brainchild of physicist Tim Berners-Lee. Although Berners-Lee formed his idea of the Web in 1989, it was another four years before the first Web browser (Mosaic) made it possible to navigate the Web simply. Businesses quickly realized the commercial potential of the Web and soon developed their own Web sites.

No one person or organization is in charge of the Internet and what's on it. However, each Web site needs an individual, or team of workers, to gather, organize, and maintain online content. These specialists, called webmasters, manage sites for businesses of all sizes, nonprofit organizations, schools, government agencies, and private individuals.

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