Leonard Kleinrock
after he published his first paper entitled "Information Flow in Large Communication Nets" on May 31, 1961. In 1962, J.C.R. Licklider became the first Director of IPTO and gave his vision of a galactic network
The first workable prototype of the Internet came in the late 1960s with the creation of ARPANET, or the Advanced Research Projects Agency Network. Originally funded by the U.S. Department of Defense, ARPANET used packet switching to allow multiple computers to communicate on a single network.
The Internet was first invented for military purposes, and then expanded to the purpose of communication among scientists. The invention also came about in part by the increasing need for computers in the 1960s.