1. Charles Babbage By:Ana Laura Soto Viquez October 2006

2. His Life Dec. 26, 1791 in London, England Attended religious schools Entered Trinity College at Cambridge Married and fathered eight children Died on October 18, 1871

3. © Science Museum/Science & Society Picture Library http://www.sciencemuseum.org.uk/on-line/babbage/page2.asp

4. Acheivements Analytical Society Member of the Royal Society of Edinburgh and Royal Astronomical Society Difference engine Analytical machine

5. Contributions to Computers Father of Computers Analytical machine

6. Difference System Designs two difference engines Based on Prony’s logarithmetic Difference system

7. Table on difference system NN^2D1D2 0012 1132 2452 3972 41692 525112 636132 749152 D1= (n +1)^2 - n^2 =n^2 +2n+1 - n^2 = 2n + 1 D2= [2(n+1) + 1] - (2n + 1) =2n + 2 + 1 - 2n - 1 =2

8. Difference Engine First automatic calculator Calculate numerical values and automatically print Solved polynomials without multiplication or division Estimated 25, 000 parts

9. © Science Museum/Science & Society Picture Library http://www.sciencemuseum.org.uk/on- line/babbage/page3.asp Built by Joseph Clement in 1832.

10. Difference Engine 2 1847 - 1849 Three times less pieces than No.1 No attempt to construct 4,000 parts and weighs 2.6 tonnes Built in 1991

11. Built by the Science Museum according to the original design by Babbage. © Science Museum/Science & Society Picture Library http://www.sciencemuseum.org.uk/on- line/babbage/page4.asp

12. Analytical Machine Automatic and general process Use punched cards Store Mill Looped

13. Science Museum/Science & Society Picture Library http://www.sciencemuseum.org.uk/on-line/babbage/page5.asp

14. Summary Background Achievements Difference System and Engines Analytical Machine Contributions

15. Works Cited Pearson, John. "Charles Babbage: Background and Education." Charles Babbage (2006): 1. Middle Search Plus. 20 September 2006. http://search.ebscohost.com. Pearson, John. "Charles Babbage: The Difference Engine." Charles Babbage (2006): 2. Middle Search Plus. 20 September 2006. http://search.ebscohost.com. "Computer Milestones." World Almanac & Book of Facts (2006): 373-373. Middle Search Plus. 20 September 2006. http://search.ebscohost.com. Gittleman, Arthur. "Babbage, Charles." World Book Online Reference Center. 2006. [20 September 2006.]. Robinson, Tim. “Difference Engines” (26 January 2006) http://www.meccano.us/difference%5fengines/ 20 September 2006 Swade, Doron. "Creating the first computer." History Today 41.9 (1991): 3-4. MAS Ultra - School Edition. 25 September 2006. http://search.ebscohost.com. © Science Museum “ Difference Engine” (2006) Science Museum 20 September 2006 http://www.sciencemuseum.org.uk/on-line/babbage/page3.asp