Computers can be seen in every corner of our life. No matter one does shopping, learnig ,communicating or even having lessons ,all of which can be done with a computer aided by internet. As far as I'm concerned, computer has made our life much easier and more convinient for mainly three reasons following.
Firstly, computers improves the efficiency dramatically. An impressive example is calculation. Computers can do maths and much more complex computation due to its large storage in a speed thousands of millions faster than does human. Moreover, it can input and output massive data in just less than a second. These  characters made it superior to human undoubtedly and hence helped people deal with a lot of problems. What's more, computers provide new ways for communication especially those far apart. Talking and idea exchang become more convinent. And even one of you in American and the other in the eastern world, you may mail or communicate through twitter or facebook anywhere &anytime.Thirdly, computers makes the world a little smaller. One may know what happen out there far away instantly. Also we can compare and assimilate from peers all over the world. And ultimately we may better the world through communication to eliminate or at least minimize misunderstanding.
Although some maintain the negative effect of a computer, its possitive side is so impressive that there is no denial that computers do more good than harm. Everything has two sides. What matters is how we utilize them.

In conclusion, computers make our life much easier and more convinient. it enhances the efficiency of communication, calculation as well as write and read. What's more,it is the first machine to free communicaition from time and place limit.Moreover, It narrows the distance and difference between people even far apart.