HISTORY OF COMPUTER:

       History of Computer:

                                          Computer was invented because "necessity is the mother of invention" . Man always searched for a fast calculating devices. It took a long time to invent the digital computer.

           A brief  history the invention of the computer is as follows:

        

          Abacus:

                          Abacus was first computing devices. It was developed 500 years ago by Chinese. It was used to perform simple addition and subtraction. Abacus was a wooden rack with horizontal wires containing beads. The beads could move easily. All simple arithmetic calculation were performed by moving the beads.

                                                                           :Abacus:

        Napier's Bone:

                                John Napier was a Scottish scientist. He invented a devices in 1614 known as Napier's Bones. The devices used rods to perform arithmetic calculation. He also created logarithm tables for making calculation easily.

                                                                          

John Napier

         Slide Rule:

                           An English mathematician William Oughtred developed a devices known as Slide Rule in 1622. It was beads on the idea of logarithm. It was very useful in solving the problems related to multiplications and divisions . The devices consisted of three parts called slide ' rule and sliding cursor.

                                                               Slide Rule

       Pascaline :

                           Blaise Pascal was a French mathematician . He invented a calculation machine in 1642. The machine was known as Pascaline . The machine had metal wheels with the digit 0 to 9. The calculation was done by rotating the wheels. It could only add and subtract  the whole number.

 

Pascaline

  HISTORY OF COMPUTER:

                                         LEIBNIZ CALCULATION:

coming soon.....