The Internet is a worldwide group of computers connected together via phone, fiber optic and cable TV lines.
Host computers hold information that is available to client computers connected to the network.
The U.S. Defense Department created the Internet in 1969 to easily share information. Universities immediately began using the Internet to share scientific data. The medium gained popularity with the public in 1991 with thedevelopment of the World Wide Web. The Internet is now a de-centralized, worldwide system with no primary administrative body. Together with e-mail, the World Wide Web is the most popular part of the Internet for the general user.