History Of Computer

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

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