To some people, the term "World Wide Web" is synonymous with "Internet," but others define it as a graphical interface for using many parts of the Internet. The World Wide Web has become one of the best known and most used aspects of the Internet.

The Internet itself began as an experiment created by the Advanced Research Projects Agency of the U.S. Department of Defense (DoD) in the 1960s. It was a network called ARPANET (Advanced Research Projects Agency Network). The first networked computers of ARPANET were connected in 1965; a low-speed telephone line brought together a computer in California and another in Massachusetts. As it grew, ARPANET connected DoD sites with university research facilities worldwide, but not in a linear way. The connections were made so that if several of them were broken, many sites would still be in full contact with one...