In 1617 John Napier invented “Napier’s Bones” which has been using Ivory rods for calculating. In 1822 Charles Babbage introduced the “Difference engine”(Analytical engine) which is known as the Modern form of computers. And by this invention Charles Babbage was famous as the “father of computers”.
In 1906 The vacuum tube was introduced by Lee de forest.
In 1936 Alan turning publishesd “On computable Numbers”.
In 1937 Atanasoff-Berry computer (ABC) was invented by John V.Atanasoff.
In 1946 EDVAC (Electronic Discrete Variable Automatic Computer) was introduced
In 1946 also the ENIAC was introduced(electronic Numerical Integrator And Computer)
In 1949 EDSAC was created by Maurice Wilkes. And it was the first practical stored program computer
In 1950 the UNIVAC- 1101 was built(it also known as ERA 1101). It was the first commercial computer in the history
In 1952 IBM launched the “701”
