Most communication techniques have been developed and evolved for military purposes. The military has always put a priority on improving communication capabilities because of their strategic importance. Telegraph, telephone, radio and satellite were invented for the purpose of immediate and efficient communication in wartime. In a similar manner, we can also trace the origin of the Internet from defense purposes. The concept of the Internet was born in the Cold War period, due to the tension between the United States and the Soviet Union. The aim was to develop a decentralized network to keep critical information flowing in case of nuclear war.
In the early 1960's the U.S. Department of Defense was concerned about the fact that the nation's communication networks could not withstand a nuclear attack from the Soviet Union. To surpass the Soviets in communication technology, the development of a new communication system was urgently required. RAND, which was the military sponsored research institute, suggested the concept of a network that would have no central control for the communication system. As a result, the Department of Defense's Advanced Projects Research Agency (DAPRA)commissioned some research institutes such as BBN (Bolt Beranek and Neumann Corp.) to develop the new communication system. This led to the birth of the first computer network system, called APRANET (Advanced Research Projects Agency Network). In 1969 the first IMPs was installed at UCLA and the initial communication was successful. This event implied the birth of one of the most revolutionary communication tools.