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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










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