Evolution of computer & Some of earlier computer's

                   Evolution of Computers

·         Blaise Pascal invented the first mechanical adding machine in 1642

·         Baron Gottfried Wilhelm von Leibniz invented the first calculator for multiplication in 1671

·         Keyboard machines originated in the United States around 1880

·         Around 1880, Herman Hollerith came up with the concept of punched cards that were extensively used as input media until late 1970s

·         Charles Babbage is considered to be the father of modern digital computers

·          He designed “Difference Engine “in 1822

·          He designed a fully automatic analytical engine in 1842 for performing basic arithmetic functions

·          His efforts established a number of principles that are fundamental to the design of any digital computer

Some of well known earlier computers

·          The Mark I Computer (1937-44)

·         The Atanasoff-Berry Computer (1939-42)

·          The ENIAC (1943-46) § The EDVAC (1946-52)

·          The EDSAC (1947-49)

·          Manchester Mark I (1948)

·          The UNIVAC I (1951)