Page 10 - modular4.0
P. 10

Chapter Profile
                                 Clickipedia




                      Abacus is also used in schools as an aid in teaching the numeral system.





                         PASCALINE ADDING MACHINE


                  In 1642,  a mathematician,  Blaise Pascal

                  invented the calculating machine called the
                  Pascaline adding machine. The numbers
                  were fed into the machine by dialing them
                  on  the  wheels.  This  device  is  believed  to

                  be  the  first mechanical calculator  of
                  the world. This machine was capable of                        Pascaline               Blaise Pascal
                  performing only addition and subtraction.


                         LEIBNIZ STEP RECKONER


                  In  1672,  a mathematician,  Gottfried Wilhelm
                  Leibniz invented the digital mechanical calculator
                  called ‘Step Reckoner’. It was the first calculator

                  that could perform all four arithmetic operations
                  i.e., addition,  subtraction,  multiplication  and                     Leibniz Step Reckoner
                  division.


                         CHARLES BABBAGE’S ANALYTICAL ENGINE


                  In 1822, a mathematician, Charles Babbage developed a steam
                  driven calculating machine, that was the size of a room, which
                  he called the Difference Engine. But even after working on this

                  project for 10 years, this machine never became a reality.




                                                                                                    Charles Babbage


                                                  In 1833, he invented a machine called the Analytical Engine,
                                                  the first ever working model of a mechanical computer, a
                                                  fully program controlled machine. This is why Charles Babbage

                        Analytical Engine         is known as the ‘father of computers’.


                 8   Modular (Ver. 4.0)-V
   5   6   7   8   9   10   11   12   13   14   15