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Computer plays such an important role nowadays that it undeniably becomes the biggest concern of the present-day world as a whole. With the steady growth in the hi-tech, as well as computer, there is a growing tendency that man who does not know how to use the computer will become an illiterate. As far as I am concerned, there are several major disadvantages for these people. In the first place, without computers help, someone may waste a large amount of precious time to pay attention to complex calculation. It is believed that computer can do almost everything. It was gradually used not only in mathematics, physics, chemistry and astronomy, but in places like library hospital and military army to replace the works of man. Besides, a computer works much faster and more accurately than man. Therefore, one who cannot use the computer always fails to keep up with the development of modern society. In addition, these kinds of people may lose opportunities that make new friends or contact with outside world and new technology. It is very clear that lots of changes have taken place in many aspects of peoples lives because of the coming of the computer era. Multi-media and surfing on-line provide people with chances to learn more about the world and up-dated information. Moreover, sending E-mail seems to be the most convenient and efficient way to communicate with families, relatives and best friends. Unfortunately all above will never happen in the life of the layman. | 
