History Of Computers
(Shallu)
The discovery of numbers, which is considered as the greates achievement of mankind led to the development of all kinds of calculating devices. Today we can't imagine a work without numbers. It took thousands of years to get the present system of the numbers. Its development passed through several stages.
The stone man used pebbles for counting people or animals. Stone was replaced by sticks on a rope. All these computing tecniques required some physical effert from man. A lot of work required for large calculation and the process was very slow. Later these scratches and symbols were replaced by the present number system. Number system found its uses in astronomy building temples and churches and calculating areas. The discovery of zero by indian mathmaticians laid the foundation stone for numeric system.
THE ABACUS :-
The earliest and simplest device that was used for calculation was the abacus. Simple abacus has been in use since 3000B.C. Abacus was first developed in China and later its use spread to all parts of the world. Even today, it is still used in many countries like Japan, China etc. It was the first device to introduce the concept of data- storage. Abacus is a clay board with numbers of beas that are placed on rods or wires.The beads are moved from one side to another for counting.
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