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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 Pascaline Blaise Pascal
was capable of 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,
Leibniz Step Reckoner
subtraction, multiplication and division.
CHARLES BABBAGE’S ANALYTICAL ENGINE
In 1822, a mathematician, Charles Babbage developed a
steam-driven calculating machine, that was of the size of a
room, that 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. That is why, Charles Babbage is known as
the ‘Father of Computers’.
Analytical Engine
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