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Evolution of



                     Computers                                                                1












                         Learning Outcomes


                             History of Computers                               Computer Generations


                             Characteristics of a Computer                      Limitations of a Computer




                 Dear Students! You have learnt about computers in your previous class.
                 It is a familiar word to you today. But have you ever wondered, ‘Who invented the computer?’
                 This machine is an outcome of the labour of several minds. No single person can be credited

                 with the invention of computers, but several names stand out in the crowd.

                  i +  HISTORY OF COMPUTERS

                 So far, you have learnt about the various uses of the computer. You have also learnt that
                 the computer is a powerful device that can be used to accomplish a variety of tasks. In
                 the past, a lot of research was done to develop a powerful machine. In this chapter, you
                 will learn about the scientists who were responsible for creating a perfect device that you
                 use in your everyday life.

                 Early Counting Tools

                 Since ancient times, people have invented tools for calculations. Early men tied knots in a
                 rope and carved marks on clay to keep the records. They also used to count with the help
                 of fingers, toes, pebbles, stones, sticks, bones, etc.














                                                         Early Counting Tools





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