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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 for you today. But have you ever thought ‘Who invented the computer?’
                 This machine is an outcome of labour of a number of minds. No particular 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 the various uses of the computer. You have also learnt that the
                 computer is a powerful device and can be used to accomplish a variety of tasks. In the
                 past, a lot of research was done in order 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 man 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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