用英语写一篇关于电脑的用法的作文（80字左右）

Computers have become very important in many areas of work and play.
There is no doubt that computers are very useful in technology and business. In space, computers help astronauts and pilots control the speed and direction of a spaceship's flight. With the help of computers, doctors can find diseases easily and solve other problems. For example, tiny computers inside people's bodies keep their hearts beating well. In factories, robots controlled by computers can do work that is dangerous to humans. Computers are also used in business to place and cancle orders. At the same time, they have made the workplace safer and better.
Since the Internet came into being, people's lives at home have changed,too. More and more people have personal computers, and they use them to play games and watch movies. Thanks to the Internet, people can do shopping and do business at home. Instead of writting letters on paper, people communicate by sebding e-mails and chatting on line. The whole world is connected. Computers have made the world smaller, like a" village".
Computers have improved our lives, but they have brought problems,too. For instance, if we work on computers too long, we may get headaches or sore eyes.If we play computer games too much, we won't study well and get enough exercise. Although computers help us work and at home, we must use them properly.