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1                                    Evolution of






                                                                  Computers








                        Chapter Profile

                            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 the result of the work of many minds. No single person
                 can be credited with the invention of computers, but several names stand out in
                 the crowd.


                     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 and can be used to accomplish a variety

                 of tasks. In the past, a great deal of research was conducted to develop a powerful
                 machine. In this chapter, you will learn about the scientists who were responsible
                 for creating the effective device you use in your everyday life.

                 Early Counting Tools

                 Since ancient times, people have invented tools for calculations. Early humans tied
                 knots in ropes and carved marks on clay to keep records. They also used fingers,
                 toes, pebbles, stones, sticks, knotted strings, and bones to count.












                                                        Early Counting Tools




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