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Computers are playing a more and more important role in people's lives. Most people's jobs are likely to be affected by computers in one way or another. Teachers, for example,can use computer in the classroom to help their teaching.Students can use computens to ask questions and solve problems. 

It is true that computers can help people do a lot of tasks. However, at the moment, there are a lot of things that a computer cannot do. Computer cannot perform an operation. 

Some people are trying to make a program, which will enable computers to think like people. They have got some surprising successes.In one game, a computer has beaten the world chess champion. This game is a board game like chess but much simpler. 

However, computers are only effective when problems are clearly described in advance. For example, an airplane can fly automatically( 自动地 )most of the time,but there is always a human pilot in it and can check whether something goes wrong. The human can react to those situations which he may not imagine in advance. 

Some people say that computers can never have"minds of their own" because they need a program, which is created by a human, to tell them what to do. This is perfectly true. But how do we know that a program giving a computer a mind of its own cannot be written? Researchers are making effort to write such a program.