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•   Time taken in planning and programming: We have to first choose the jobs to be

                    computerised, and then proper planning and development of programs can take days,
                    months and sometimes even years.


                                                                                   #Problem Solving & Logical Reasoning
                       Let’s CatCh Up

                   Identify the hints given below and write down their names:

                   1.  You can keep me on your lap.                                            __________________

                   2.   I was the first calculator that could perform all four arithmetic
                       operations, i.e., addition, subtraction, multiplication and division.   __________________
                   3.  Blaise Pascal is my father.                                             __________________

                   4.  You can keep me on a desk.                                              __________________





                    To Sum Up


                          Early people tied knots in rope and carved marks on clay to keep the records.

                          ABACUS was the first calculating aid invented 3000 years ago in China.
                          Charles Babbage developed the Difference Engine in 1822 and Analytical engine
                        in 1833.

                          Lady Ada Lovelace is considered as the first programmer.
                          Herman Hollerith developed the Tabulating Machine in 1890.

                          The use of the ICs reduced the size and increased the speed of the computers.
                         The data stored in the computer can be recalled at any time.

                         A computer can process millions of instructions in seconds.





                                                          Exercise



                                                       Section A (Objective)

                 A.  Tick ( ) the correct option.
                    1.  Which of these was used by the early man for counting?

                        a. Calculator                                   b. Abacus

                        c. Bones                                        d. Tabulating Machine






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                                                                                         Evolution of Computers
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