It is true that the most striking feature of the present century is the process of science .Thanks to this, many great inventions have been born. And one of the greatest advances in modern technology has been the invention of computer. Nowadays it not only is widely used in scientific fields but also has become the commonplace item to everyone. Some people believe that they can't do anything without a computer. We can see that this machine do influence every aspect of everyday life both for the better and for the worse.
             There are some benefits when u use computer. Firstly, the artificial intelligent provides us a pleasant way to relax and spend our free time .On an example is playing game. There are many kinds of games in a computer for you to choose. They are so interesting that you can be addicted. Also, computer can play the role of a VCR (i.e., a videocassette recorder). Many movies on demand. All you have to do is choose one and enjoy it. Secondly, because of computer, comunication becomes more convenience and easier. Its advance has brought the different parts of the world into closer touch with one another than ever before. We are able to communicate with people far away and even have a conversation with them via computer. Also, because of its accuration and high speed, this device allows us to reach distant lands within a very short time . Writing letter is an example .For a long time, many people have stopped writing letter .But now, writing to communicate has been coming back in electronic form, or e-mail. The reason is that it takes no more than a few seconds to delivery a letter from the sender to the receiver, even from one country to another. It is obvious that computer is the most efficient servants man has ever had and there is no limit to the way they can be used to improve our lives.
             Together with its benefits, its improper use contains some easily seem harms. Firstly, using computer is a passive activity .I
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