History of Computers :
Abacus from the early centuries is the example of computing
machines. Charles Babbage is referred as the grandfather of the modern
computer. He designed two computers :
The difference Engine : It was based on the mathematical
principle of finite differences and was used to solve calculations on large
numbers using a formula. It was also used for solving the polynomial and
trigonometric functions.
The analytical Engine by Babbage : It was general purpose
computing device which could be used for performing any mathematical operation
automatically. It consisted of the following components :
The Store : A mechanical memory unit consisting of sets of
counter wheels.
The Mill : An arithmetic unit which is capable of performing
the four basic arithmetic operations.
