Abacus
Abacus is known to be the first mechanical
calculating device.
It was used to be performed addition and
subtraction easily and speedily.
This device was a first developed by the
Egyptians in the 10th century B. C, but it was given it final shape in the 12th
century A. D. by the Chinese educationists.
NAPIER՚s BONES
As
the necessity demanded, scientist started inventing better calculating device.
In this process, John Napier՚s of Scotland
invented a calculating device, in the year 1617 called the Napier Bones.
In the device, Napier has used the bone
rods, these rods that one can do addition, subtraction, multiplication, and
division easily.
Pascal Calculator
In the year 1642, Blaise Pascal a French
scientist invented an adding machine called Pascal՚s calculator, which
represents the help position of digit with the help of gears in it.
Leibniz Calculator
In the year 1671, a German mathematics,
Gottfried Leibniz modified the Pascal calculator and he developed a machine
which could perform various calculation based on multiplication and division as
well
Analytical Engine
In
the year 1833, a scientist from England knows to be Charles Babbage invented
such a machine. T
his device was called Analytical engine and
it deemed the first mechanical computer.
For
this great invention of the computer, Sir Charles Babbage is also known as the
father of the computer.
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