**THE PASCALâ€™S CALCULATOR**

In 1642, at the age of 19, a French mathematician name Biaise Pascal, invented the Pascaline. The Pascaline is the first mechanical and automatic calculator.It represents the position of digit with the help of gears in it. The machine is sometimes called adding machine or Pascalâ€™s calculator.

**THE LEIBNIZ CALCULATOR**

Gottfried Leibniz a German mathemation modified the Pascal calculator in 1673. He developed a machine called Liebniz Calculator which could perform various calculation based on multiplication and division as well.

**ANALYTICAL ENGINE**

The Analytical Engine was a mechanical computer that can solve any mathematical problem. It was invented by Charles Babbage a scientist form England invented in 1833. It uses punch-cards similar to those used by the Jacquard loom and can perform simple conditional operations.

For this great invention of the computer, Sir Charles Babbage is also known as the father of the computer.