In the last 30 years, the Internet has grown rapidly. Pessimistic experts worry about crime in cyberspace. They think that hackers and terrorists may attack the world’s computers, cause chaos and make planes and trains crash. Optimistic experts believe cyberspace will make life easier. We can find out about holiday offers, get entertainments and get all sorts of information on the Internet. TV and mail service may disappear. Some experts see our future in virtual reality. With sound and pictures, we will feel as if we are in a real situation.