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3.  First mechanical computer                                                    .............................

                    4.  First version of Microsoft Windows released                                  .............................


                 D.  Short answer type questions.
                    1.  How did people calculate or count in the ancient times?

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                    2.  Microprocessors were used in which generation of computers?


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                    3.  What is ENIAC?


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                 E.  Long answer type questions.

                    1.  What are the differences between first and second-generation computers?

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                    2.  Write any two features of third-generation computers.

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                                                   In the lab                                         Subject Enrichment



                     Open MS Word, type the name of different calculating devices and their inventors
                   and save the file as ‘Evolution of Computers’.

                                    Calculating Device                 Inventor
                                    Analytical Engine                  Charles Babbage
                                    Leibniz Step Reckoner              Gottfried Wilhelm Leibniz

                                    Tabulating Machine                 Herman Hollerith
                                    Pascaline Adding Machine           Blaise Pascal





                  Teacher's Corner

                 1.   Demonstrate the ABACUS and its use to the students.
                 2.   Discuss the great breakthroughs that took place in each generation of computers.




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