History of Computer

History of Computer Points : History of Computer, Write brief history of computer There are three ages of computer history.
Dark Age (3000. B.C — 1890 A.D)
Middle Age (1860 A.D — 1929 A.D)
Modern Age(From 1930 till now)
Dark Age. (3000B.C—1890A.D) Abacus is the first device for counting purpose made in china. Napier Bones made by Scottish mathematician, in 1617. It had eleven rods having four faces which were used as multiplication tools. Pascal calculator made by blase pascal in 1642. It is first calculator. It can use only for Addition. and subtraction.Leibnitz calculator developed in 1671 by grottfried w.von leibnitz it is better calculation device than pascal calculator It can multiply, divide and square root. Difference Engine is a true conception computer by charles babbage in 18 century So Its also called “father of computer. Middle Age (1860 A.D — 1929 A.D) In 1890 US census bureau asked Dr. Herman Hollerith to find a way to speed up the processing of census data. Punch cards created in middle age. The first electromechanical computer developed by Howard Aiken in 1937 at Harvard university. Mark-i completed in 1944 1ich is the realization of babbage’ dream. Modern Age (From 1930 till now) In 1946, John W. Mauchly and J.P. Eckert developed an Electronic Numerical Integrator and Calculator (ENIAC) improved version was EDVAC (Electronic Discrete Variable Automatic Computer) by Newman in 1950 Computer with automatic data processing capabilities one such computer was Univac-L Univac-II.