题目内容：
Computers have become so necessary to modern living that it is difficult to believe that they are a relatively recent invention. Undoubtedly, they have proved to be of great value, but they also have their disadvantages. For one thing, they have added to our already large number of crimes.
Hacking was the first computer crime that most of us became aware of. By using their computing expertise, people known as hackers can gain unauthorized access to someone else.s computer and make use of the data which they find there. They may, for example, get hold of lists of the names of their competitors. clients and use these to build up their own businesses, or they may use hacking as a form of industrial espionage to find out a rival company.s plans. Other hacking activities may be more obviously criminal, in that hackers may log on to financial data in someone else.s computer and either alter it illegally or use it for fraudulent purposes.
The possibility of serious financial fraud has been greatly increased by the modern practice of purchasing goods through the Internet. Apparently, the use of credit cards to pay for purchases has led to record levels of fraud with a great many people being swindled out of a great deal of money. Banks are working hard to improve online security and to provide safeguards for customers, but fraudsters are working just as hard to improve their crooke
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