This paper examines the concept of cyberterrorism. Fringe activity on the Internet ranges from nonviolent `Use' at one end to `Cyberterrorism' at the other. Rejecting the idea that cyberterrorism is widespread, the focus here is on terrorist groups' `use' of the Internet, in particular the content of their websites, and their `misuse' of the medium, as in hacking wars, for example. Terrorist groups' use of the Internet for the purpose of inter-group communication is also surveyed, partly because of its importance for the inter-networked forms of organisation apparently being adopted by these groups, but also due to the part played by the Internet in the events of 9-11 and their aftermath. Contents