1. History of the Computer

2. How the Computer Evolved
1642 Blaise Pascal – mechanical adding machine
Early 1800’s Jacquard – uses punch cards to control the pattern of the weaving loom
1832 Charles Babbage - invents the Difference Engine
1890 Herman Hollerith – invents a machine using punch card to tabulate info for the Census
Hollerith’s Tabulating Machine

3. Evolution (continued)
1910 Charles Watson Sr. – International Business Machines
1946 – Mauchly and Eckert created the ENIAC computer, first electronic computer is unveiled at U. of Pennsylvania
1970’s – Integrated circuits and silicon chips lead to smaller microprocessors
                                                 

4. ENIAC Computer Miles of wiring 18,000 vacuum tubes
Thousands of resistors and switches
No monitor
3,000 blinking lights
Cost $486,000
100,000 additions per second
Weighed 30 tons
Filled a 30x50 foot room
Could be replaced today by one fingernail-size silicon chip