CHARLES BABBAGE IS CREDITED WITH INVENTING THE FIRST MECHANICAL COMPUTER.

 Ada Lovelace is credited with writing the first algorithm intended for processing on a computer. The earliest foundations of what would become computer science predate the invention of the modern digital computer. Machines for calculating fixed numerical tasks such as the abacus have existed since antiquity, aiding in computations such as multiplication and division.

Blaise Pascal designed and constructed the first working mechanical calculator, Pascal's calculator, in 1642.[3] In 1673 Gottfried Leibniz demonstrated a digital mechanical calculator, called the 'Stepped Reckoner'.[4] He may be considered the first computer scientist and information theorist, for, among other reasons, documenting the binary number system.

In 1820, Thomas de Colmar launched the mechanical calculator industry [5] when he released his simplified arithmometer, which was the first calculating machine strong enough and reliable enough