History Of Computer
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Transcript of History Of Computer
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PRESENTATIONIntroduction to
Computing
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Presented To
Respected Sir Jawad Ahmed
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Topic
History of Computer
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Group Members
Name Roll # Hassnain Mumtaz 22
Riza Ali 25
Syed Obaid ur Rahman 43
Ch.Waqar Nizam 41
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Abacus
The vary first computing device.
Developed 5000 years ago.
Perform simple addition & subtraction.
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Label Diagram
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John Napier’s Bone
A Scottish mathematician.
Created Logarithm tables.
Created a device (Napier’s Bone).
Designed in 17th century.
Used by accountants & Book keepers.
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Napier’s Bone
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Blaise Pascal
A French mathematician.
In 1642 invented mechanical adding machine.
Pascaline Calculator.
Could only add & Subtract.
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Pascaline Calculator
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Von Leibniz
A German Scientist.
In 1694 developed a calculating machine.
Can multiply & divide also.
More reliable & accurate.
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Leibniz’s Calculator
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Charles Babbage
In 1822, he invented a difference engine.
In 1842, he developed analytical engine.
Perform 60 additions per minute.
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Babbage’s Engines
DIFFERENCE ENGINE ANALYTICAL ENGINE
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Atanasoff
Professor at Lowa University.
Invented an electronic computer.
Applied Boolean Algebra to computer circuitry.
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Mark 1 Computer(1937-44)
Automatic Sequence Controlled calculator.
1st fully automatic calculating machine.
Designed by Howard A.Aiken (Harvard University).
Very reliable but huge in size.
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Howard’s Mark 1
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The ENIAC (1943-46)
Stands for Electronic Numerical Integrator & Calculator.
Invented by J.P.Eckert & John Mauchly (1946).
1st electronic computer.
Very heavy & large in size.
Consumed 140 kilo Watts of power.
Could perform 5000 additions per second.
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The ENIAC
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The EDVAC (1946-52)
Stands for Electronic Discrete Variable Automatic Calculator.
Developed by Dr.John Von Neumann.
Could store instructions & data.
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The EDVAC
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The UNIVAC (1951)
Stands for Universal Automatic Computer.
1st successful computer by Eckert & Mauchly.
1st computer for commercial use.
Manufactured for both scientific & commercial applications.
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The UNIVAC