1. History of Computers

2. Over 5,000 years ago…

3. 1600’s Blaise Pascal Gottrfried von Leibniz Pascaline
Improved on Pascaline

4. 1600’s
Pascaline
Blaise Pascal

5. Early 1800’s Joseph Marie Jacquard Charles Xavier Thomas
Jacquard’s Loom
Charles Xavier Thomas
Arithometer

6. Early 1800’s
Jacquard’s Loom

7. Mid-1800’s
Charles Babbage
Countess Ada Lovelace

8. Mid 1800’s
Analytical Engine

9. Late 1800’s

10. 1945 - 1956 First Generation Computers Used Vacuum tubes
Each computer had its own machine language
Examples:
Colossus
ENIAC
UNIVAC

11.
ENIAC

12.
UNIVAC

13.
Term “Computer Bug” coined by Admiral Grace Hopper

14. 1956 - 1963 Second Generation Computers
Transistors replaced vacuum tubes
Era of the punch cards
Examples
LARC
Stretch
IBM 1401

15.
IBM 7094
IBM 1401

16. 1964 - 1971 Third Generation Computers
Integrated Circuits replaced transistors
Operating System used
Examples
IBM System 360
Cray

17.
Cray 23
Cray 29

18.
IBM System 360

19. 1971 - present Fourth generation computers
Large Scale Integration (LSI)
Very Large Scale Integration (VLSI)
Ultra Large Scale Integration (ULSI)
Era of the Personal Computer
Pioneering Examples
Commodore
Radio Shack
Apple
IBM

20. present
Dell Dimension 8200
IBM PC 1

21. 1971 - present ASCI White Most powerful computing platform ever built!
12.3 TeraOps (12,300,000,000,000 operations per second)

22. 1971 - present 1981 – 2 million computers in use
1992 – 65 million personal computers