The computer is undoubtedly one of the most amazing and important inventions of the twentieth century. Boring or time-consuming jobs which, in the past, would have been carry out by hundreds of workers can now be done by one small computerHowever, the usage of the computer has not been entirely problem-free. Many people feel that we are already too dependent on computers. They think that computers themselves are becoming too powerful, and that people are no longer in control of them.One of the problems with a computer is that,like any other machines,it can break down.Is a computer is damaged,then the information it is storing can be lost.If a computer program has an error in it,the computer's calculations can be serious affected