Chapter # 3 ( Basic of Calculator / Who Invented Calculator ? )

In 1642, "Blaise Pascal" invented the world's first calculator after researching and experimenting ABACUS.
Pascal's calculator could do only two functions of ;

1. Addition 
2. Multiplication

Soon after, these functions are advanced with Division and Subtractions by an other scientist.



In 1673, G-W-Leibnitz invented advance Leibnitz Calculator which was advance feature of Pascal's calculator. Leibnitz calculator could do following functions.

1. Divide
2. Multiply
3. Subtract
4. Addition