evolution / historyof Computer

EARLY COMPUTING DEVICES

The AbacusThe first calculating device is known as the ABACUS. This device was invented some 5,000 years ago in China.

THE ABACUS

NAPIER’S BONES In 1617, John Napier invented a calculating device known as Napier’s Bones.

This calculating device was specially used for multiplications.

Napier’s Bones

THE PASCALINE CALCULATOR

In 1642, Blaise Pascal, a French mathematician, invented the Pascal calculator. This device, also known as the Pascaline. This device was limited to addition & subtraction only.

THE PASCALINE CALCULATOR

ELECTRO-MECHANICAL COMPUTING DEVICESDifference EngineIn 1821, Charles Babbage, a British mathematician professor, invented the Difference Engine. The machine had the capacity to perform calculations.

DIFFERENCE ENGINE

ANALYTICAL ENGINE

In, 1834, he invented another device which was a programmable mechanical calculator known as Analytical Engine.All the modern computers are based on the concept of Analytical Engine.

ANALYTICAL ENGINE

Electronic Computing Devices

MARK 1The first electronic computer was invented by Howard Aiken in 1930.This computer had the capacity to perform three additions, one subraction and one multiplication per second.

MARK I

ENIAC

The first digital computer invented was known as ENIAC.ENIAC stands for Electronic Numerical Integrator and Calculator.

ENIAC

ENIAC