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DIFFERENCE ENGINE

                                              In 1822,  Charles Babbage, a  mathematician,  invented  the
                                              Difference Engine. It was the first automatic calculator and was
                                              capable of performing mathematical calculations automatically.




                 ANALYTICAL ENGINE

                 In 1837, Charles Babbage  devised  another  calculator  called
                 Analytical  Engine. It  is  the  first-ever working  model  of a

                 mechanical computer and a fully program controlled machine.
                 This is why Charles Babbage is known as the 'father of computers'.






                      Tick ( ) if you know this.
                      ▶   Abacus was invented by the Chinese people.

                      ▶   John Napier was a Scottish mathematician.





                                                                                                         PURE
                     Lady Ada Lovelace is known as the first computer programmer as she created
                     the first computer program in 1883.                                                 FACT





                         GENERATIONS OF COMPUTERS

                 After these  early calculating  machines,  the present  computer  took  its  shape  in five
                 generations. Let's learn about them.


                                                        FIRST GENERATION

                     Timeline: 1940s
                     Technology: Vacuum tubes
                     Example of Computer: ENIAC, EDVAC,
                     UNIVAC – I, MARK I
                     Features:
                          Very expensive
                            Quite large and generated a lot of heat
                          Very low speed




                                                                                            The Computer Timeline  17
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