The origins of the Internet are in ARPANET, a network of computers set up in September of 1969 in the U.S. by ARPA (Advanced Research Projects Agency). ARPA was created in 1958 by the Department of Defense of the United States to give way to expand and develop research, especially after the passing of the Soviet technology, which launched the first satellite (Sputnik) in 1957, conquering the American skies: when NASA took over the management of space programs ARPA assumed control of all scientific research in the long term in the military.
Around 1965 the ARPA began to have serious management problems: he had several computers scattered in various locations (all very expensive) that they could not talk: they could not do it even if they had been in the same room. Exchange files between them was almost impossible because of the storage formats are completely different (and owners) that each of them used, so it was necessary a lot of time and work to move data between different computers, not to mention the effort required to bring and adapt the programs from one computer to another.
Thus, in 1969 Leonard Kleinrock, owner of the laboratory at UCLA, was commissioned to create the first telephone connection from computer to computer of the University of California at Los Angeles and the Stanford Research Institute, who were thus the first two nodes Internet: the first application I've ever worked on the internet was a telnet session. In December 1969 were added to connect the University of Santa Barbara and Utah, respectively the third and fourth node.
In 1973 Robert Kahn, of ARPA, and Vinton Cerf of Stanford University, began writing for the structure of the Internet.
