Introduction To Early Computers

Abacus

• Its the first known device used for calculation• It was invented more than 5000 years ago• It was used in china for counting

Difference Engine

• Charles Babbage designed the Difference Engine in 1822 to prepare mathematical tables

• It had many similarities with modern computer

MARK-1

• It was first automatic digital computer• It was made in 1944

ENIAC

• It was the first general purpose computer• It used vaccum tubes• It was very large in size.

Generation 1 : ENIAC The ENIAC (Electronic Numerical Integrator and Computer) was unveiled in 1946: the first all-electronic, general-purpose digital computer

UNIVAC-1

UNIVAC-1

• It was made in 1951• It was faster than previous computers.