What year was the Internet a reality when 213 computers from different universities were tied together in a network that grew to 300,000 computers in the next ten years?

Explanation

The foundation of the Internet was made in the 1960s by the American defence. For security reasons, the Internet did not have a central computer where all information was stored on a single hard drive. The Internet therefore developed as a decentralised computer network. Eventually, a number of research institutions became online and thus the Internet emerged. In 1981, 213 computers from different universities were tied together and just 10 years later, the number was more than 300,000.