It is a network of networks that comprises private, public, academic, business, and government networks of local to global scope, linked by electronic, wireless, and optical networking technologies.
The Internet is a system architecture that has revolutionized communications and methods of commerce by allowing various computer networks around the world to interconnect. The Internet emerged in the United States in the 1970s but did not become viable to the general public until the early 1990s.
Global communication is easy now thanks to an intricately linked worldwide computer network that we call the Internet. In less than 20 years, the Internet has expanded to link up around 230 different nations. Even some of the world's poorest developing nations are now connected.