This guide to making unauthorized entries into computer networks covers computer and network viruses, the case of Edward Austin Singh and many other cases that have captured the public imagination. There are sections on electronic mail, electronic publishing services and communications aids. Steve Gold is a Staff writer on "PC Dealer" a computer trade publication. He is also Newsytes UK Bureau Chief, and a regular contributor to many other computer magazines and sections, including "Amstrad Professional Computing, Computer Guardian", "Popular Computing Weekly" and "Telelink Magazine". He has his own daily computer communications column on Prestel called Micromouse. He is somewhat infamous throughout the UK computer scene owing to the "Great Prestel Hack" court case in which he was acquitted.