The Internet in its current incarnation came into existence with the invention of the World Wide Web by Tim Berners-Lee in the 1990s. However, the general idea behind the Internet was already in use at that time, albeit in a much smaller way.
The modern Internet originated with a U.S. Department of Defense project called ARPANET in the 1960s. It was created to enable multiple computers to communicate with each other on a single network. Its primary use was to share information. The idea evolved into the modern Internet with the advent of the TCP/IP protocol, allowing multiple networks to be combined into one global network.