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PRESENTATIONIntroduction to
Computing
Presented To
Respected Sir Jawad Ahmed
Topic
History of Computer
Group Members
Name Roll # Hassnain Mumtaz 22
Riza Ali 25
Syed Obaid ur Rahman 43
Ch.Waqar Nizam 41
Abacus
The vary first computing device.
Developed 5000 years ago.
Perform simple addition & subtraction.
Label Diagram
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.
Napier’s Bone
Blaise Pascal
A French mathematician.
In 1642 invented mechanical adding machine.
Pascaline Calculator.
Could only add & Subtract.
Pascaline Calculator
Von Leibniz
A German Scientist.
In 1694 developed a calculating machine.
Can multiply & divide also.
More reliable & accurate.
Leibniz’s Calculator
Charles Babbage
In 1822, he invented a difference engine.
In 1842, he developed analytical engine.
Perform 60 additions per minute.
Babbage’s Engines
DIFFERENCE ENGINE ANALYTICAL ENGINE
Atanasoff
Professor at Lowa University.
Invented an electronic computer.
Applied Boolean Algebra to computer circuitry.
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.
Howard’s Mark 1
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.
The ENIAC
The EDVAC (1946-52)
Stands for Electronic Discrete Variable Automatic Calculator.
Developed by Dr.John Von Neumann.
Could store instructions & data.
The EDVAC
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.
The UNIVAC
