Abacus

Why does the Abacus exist?

The difference between a counting board and an abacus.

What did the first counting board look like?

Evolution: The Abacus through the Ages

Ancient Times

The middle Ages

Modern Times

1650-1945

Napier’s bones

Edmund Gunter

Wilhelm Schickard

Blaise Pascal

Barron Gottfried

Joseph Jacquard

Charles Babbage

Augusta Ada Byron

Herman Hollerith

Waldimar Polson

Valve

Konrand Zuse

Alan Turing

Jorge Sitbits

Digital Electronic Calculator

Colossus

Mark I

1946-1959

ENIAC

John von Neumann

Transistor

SSEC

EDVAC

Whirlwind

UNIVAC

I A S

Leo

Magnetic Drum calculator

FORTRAN Language and IBM 704

COBOL 

ALGOL 60

1960 onwards

Integrated Circuits

Atlas

P.D.P. 11

INTEL 4004

Altair 8800

IBM PCs

Cray X-Mp

The last slide rule made by Keesel & Eser co-operation

From 1980- 1980

1980 onwards

Computer generations (Hardware generations)