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Chapter Profile
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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 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’.
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