All we know that people have made a computer. We can talk about its use and harm for hours.
But I can't imagine my life without it! A computer is very useful for a man because it helps him to do some sums. With its help people can talk at a great distance. A computer can answer almost any question.
But let's talk about harm. If we use it too much we will hurt our eyes. After we use computer too much we will became angry with almost everything.
As I have said before we can argue for hours about its harm and use. But it all depends upon only us.