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EVOLUTION OF COMPUTERS
EARLY COUNTING TOOLS
Since ancient times, people have invented tools for calculations. Early man tied knots in
a rope and carved marks on clay to keep the records. They also used to count with the
help of fingers, toes, pebbles, stones, sticks, bones, etc.
ABACUS—FIRST CALCULATING DEVICE
The first step towards computing was the invention of Abacus
around 3000 years ago, in China. It is a wooden frame with beads
on parallel wires which can do simple calculations like addition and
subtraction.
Abacus
PASCALINE ADDING MACHINE
In 1642, a mathematician, Blaise Pascal
invented the calculating machine called the
Pascaline adding machine. This device
is believed to be the first mechanical
calculator of the world. This machine was
capable of performing only addition and Pascaline Blaise Pascal
subtraction.
CHARLES BABBAGE’S ANALYTICAL ENGINE
In 1822, Charles Babbage, a mathematician, developed a
steam-driven calculating machine, which 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
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