If we see the history of computer we can find that computer were developed from a different calculating devices such as :-Abacus, Napier’s bone, the slide rule,PASCAL,Leibniz's Stepped Calculator,Analytical Engine,etc and some explanation of some calculating devices Are as follows:-
1. Abacus It is a portable device that consists of beads strung on wires or wooden rods. Using an abacus, one can rapidly and accurately add, subtract, multiply or divide large numbers. No one is sure about exactly when the fist abacus appeared.
2. Napier’s bones John Napier, a Scottish Mathematician did a considerable amount of work on aids for calculation. The most notable of which was the invention of logarithms in 1614. He also devised a set of rods for use as multiplications aids. These rods were carved from bone and are often called Napier's bones.
3. Pascale It was 19 year old Bails Pascal, in 1642, a French mathematician who devised the first true calculating machine, reputedly to help his father who was a tax controller! Number the movements to a result dial. Printed on the wheel were the numbers from 0 to 9. When the first wheel made a complete turn from 0 to 9, it automatically caused the second wheel to advance to the next number, and so on. e.t.c
1. Abacus It is a portable device that consists of beads strung on wires or wooden rods. Using an abacus, one can rapidly and accurately add, subtract, multiply or divide large numbers. No one is sure about exactly when the fist abacus appeared.
2. Napier’s bones John Napier, a Scottish Mathematician did a considerable amount of work on aids for calculation. The most notable of which was the invention of logarithms in 1614. He also devised a set of rods for use as multiplications aids. These rods were carved from bone and are often called Napier's bones.
3. Pascale It was 19 year old Bails Pascal, in 1642, a French mathematician who devised the first true calculating machine, reputedly to help his father who was a tax controller! Number the movements to a result dial. Printed on the wheel were the numbers from 0 to 9. When the first wheel made a complete turn from 0 to 9, it automatically caused the second wheel to advance to the next number, and so on. e.t.c
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