More and more people nowadays are interested to be known about all events or finding information quickly. With the help of the internet you can find it easily. Back in the 1960s, during the cold war, the Pentagon asked the question: "How can could orders be issued to the armed forces if the U.S. were ravaged by a nuclear assault?" The main form of communication ways at that time was the telephone, which connected offices, the radio and TV stations was not only vulnerable to attack, it would also probably be the first to go. Pentagon needed military systems that would continue to work even the phones and radio had broken down. In 1964 Paul Baran connected 4 computers i