1. The History of Computers Dr. Ray Cafolla

2. Ancient “Computers” • Fingers and toes • Stones • Abacus (3000 bc)

3. The Abacus

4. The Forerunners of Computers • 1620 Napier's bones • 1642 Blaise Pascal (Pascaline)

5. The Forerunners of Computers • 1670 Leibnitz’ Stepped Reckoner

6. The Difference Engine Babbage's Analytical Engine (1833)

7. Jacquard's Loom (1810)

8. Herman Hollerith (1880)Punched Cards

9. Three Generations of Computer • 1951-1958 first generation (vacuum tubes)

10. Three Generations of Computer • 1959-1964 second generation computer (transistors)

11. Three Generations of Computer • 1965-1970 third generation computers (integrated circuits – ICs)

12. Atanasoff-Berry Computer (ABC - 1939)The First Computer

13. Mark I (1944)First American Programmable Computer

14. ENIAC (1946)Electronic Numerical Integrator And Calculator

15. The Post War Boom • Johnny von Neuman (1945) • Alan Turing (1946) Enigma • 1951 UNIVAC (Universal Automatic Computer)

16. Modern Computers • 1965 Third generation computers • 1975 Fourth generation computers (Microcomputers) • Now Multimedia, artificial intelligence

17. The History of Computers The End