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    Pascaline Calculator

                      Pascaline calculator is the first mechanical calculator in the world. It was devised by a
                      French mathematician. It used gears, dials and a series of rotating numbered wheels.
                      Pascaline calculator was capable of performing only addition and subtraction.

                      The first Pascaline calculator could perform calculations
                      up to 5-digit numbers and the advanced series models
                      were able to perform calculations up to 8-digit numbers.

                                                   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'.

                      GENERATION 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

                      106   Premium Edition-IV

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