1. © 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE History of Computers

2. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE Is this a computer? http://commons.wikimedia.org/wiki/File:Dell_Desktop_Computer_in_school_classroom.jpg

3. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE How about this?

4. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE What about this? http://commons.wikimedia.org/wiki/File:Chinese-abacus.jpg

5. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE Or this?

6. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE Abacus Is a simple device to aid in calculating. This is an Inca Quipu.png 1 And a Roman Abacus 2 1 4th edition of the Meyers Konversationslexikon 1888 2 Reconstruction of a Roman Abacus, made by the RGZ Museum in Mainz, 1977

7. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPEAbacus Many countries still use Abacuses in day- to-day sales calculations http://www.flickr.com/photos/todbaker/2305853928

8. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE 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. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE 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. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE 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. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE The Blackbird set a coast-to-coast record time of 67 minutes 54 seconds.

12. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE Mechanical computers http://commons.wikimedia.org/wiki/File:Curta_Mechanical_computer_img_1651.jpg

13. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE Univac http://www.flickr.com/photos/diorama_sky/2902656083/

14. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE Modern Computer http://commons.wikimedia.org/wiki/File:Dell_Desktop_Computer_in_school_classroom.jpg

15. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE Vacuum Tubes http://www.flickr.com/photos/nickames/4081648117/

16. ©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPETransistor http://www.flickr.com/photos/oskay/2105641530