The history of global computer networks begins in the middle of the Cold War, in 1957, when US Department of Defense created ARPA, the Advanced Research Project Agency. Internet was born in 1972 as a result of various attempts at electronic data transmission, both in Britain and in the USA. While universities were initiators and benefactors of Internet in its early years of development, academic research and teaching on the net has been progressively joined by commercial services. This ‘privatisation’, which began in 1991, has changed the face of Internet. It is probably one of the main reasons for the most recent quantum leap in popular computer networking, the incorporation of Internet into the World Wide Web (WWW) which, with its associated ‘browser’ software (for example Navigator) has made the global computer network easily accessible to anyone with a computer and the motivation to use it to explore what is available.