The largest network of computers is known as the Internet. As of 2015, this vast system connects more than 3 billion users, providing easy access to information and real-time communication services.
The Internet is a revolutionary technology that was preceded by the ARPANET, a wide-area network developed by the United States Defense Advanced Research Project Agency in 1969. From the first two nodes that connected the University of California, Los Angeles to Stanford Research Institute, this fledgling technology has since evolved into a more complex system that spans the entire globe.
The Internet is often used interchangeably with the World Wide Web. Although the two terms are related, they are not synonymous. While the Internet is a physical networking infrastructure, the World Wide Web is a virtual system of hyper-linked documents that are cached on Internet servers.