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History of Computers

History of Computers. Is this a computer?. http://commons.wikimedia.org/wiki/File:Dell_Desktop_Computer_in_school_classroom.jpg. How about this?. What about this?. http://commons.wikimedia.org/wiki/File:Chinese-abacus.jpg. Or this?. Abacus. Is a simple device to aid in calculating.

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History of Computers

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  1. History of Computers

  2. Is this a computer? http://commons.wikimedia.org/wiki/File:Dell_Desktop_Computer_in_school_classroom.jpg

  3. How about this?

  4. What about this? http://commons.wikimedia.org/wiki/File:Chinese-abacus.jpg

  5. Or this?

  6. Abacus • Is a simple device to aid in calculating. • This is an Inca Quipu.png1 • And a Roman Abacus2 14th edition of the Meyers Konversationslexikon 1888 2Reconstruction of a Roman Abacus, made by the RGZ Museum in Mainz, 1977

  7. Abacus Many countries still use Abacuses in day- to-day sales calculations http://www.flickr.com/photos/todbaker/2305853928

  8. Abacus • Primarily used as a aid for addition and subtraction • For more complex operations other tools are often used, such as slide rules http://commons.wikimedia.org/wiki/File:Chinese-abacus.jpg

  9. Slide rule • While the abacus was in use over 4000 years ago, the slide rule is a relatively modern device. • William Oughtred invented the slide rule around 1622 AD

  10. Slide rule • During the 1960s computers became a resource that engineers could use. • The engineers who designed the SR-71 Blackbird still used slide rules on a daily basis.

  11. The Blackbird set a coast-to-coast record time of 67 minutes 54 seconds.

  12. Mechanical computers http://commons.wikimedia.org/wiki/File:Curta_Mechanical_computer_img_1651.jpg

  13. Univac http://www.flickr.com/photos/diorama_sky/2902656083/

  14. Modern Computer http://commons.wikimedia.org/wiki/File:Dell_Desktop_Computer_in_school_classroom.jpg

  15. Vacuum Tubes http://www.flickr.com/photos/nickames/4081648117/

  16. Transistor http://www.flickr.com/photos/oskay/2105641530

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