Internet 
The global system of computer networks, interconnected by means of TCP/IP protocols, that makes possible the World Wide Web, Usenet newsgroups, and e-mail, among many other applications, such as file sharing and electronic commerce. The Internet was born in 1973, when the U.S. Defense Advanced Research Projects Agency (DARPA) initiated a program to develop communication protocols to allow networked computers to communicate across linked packet networks. This first huge collection of networks, the ARPAnet, eventually grew into what we know as the Internet. Internet backbones carry the enormous volumes of data that flow through the Internet every day. Access to the Internet is provided by Internet service providers ISPs).