The modern world is undoubtedly a world of computers.. It has brought about a great change in our way of life. It works as a substitute for human brain. It has enabled us perform any difficult work accurately / wonderfully in a few seconds. In the fields of medical science, printing, educations etc. computers are doing accurate/ wonderful jobs. In the western countries, computers dominate every sphere of mans life. our country also gradually moving towards a computer culture. It saves both our time and energy. If we make a constructive use of it, it can render a great service to mankind.