Internet is a global system of interconnected computer networks.

The interconnectedness of the Internet makes it a very fault tolerant system: When one part fails, other connections take over to route traffic to its intended destination.

There is no one organisation in charge of the Internet; each section is run by its owner.

Started in the 1960s as ARPANET, it was initially used by the military and academia; by the late 1970s/early 1980s, it was available to the public via Telenet.