Internet is a system of computer connection all around the world.
It contains a huge amount of information accessible from everywhere. It has its origin in 1969, when the U.S. Department of Defence developed a project called ARPAnet, consisting of several interconnected nets by means of satellite and radio, in order to have an effective and secure communication system for military research. The idea was that every computer on the network could communicate, as an individual, with any other one. Some universities realised of the great potential that system of communication had, so they found ways to connect to ARPAnet. Some time later, ARPAnet stopped being an exclusively military forum and scientific discussions were more and more frequent.