© 2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
History of Computers
©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
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
How about this?
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
What about this?
http://commons.wikimedia.org/wiki/File:Chinese-abacus.jpg
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
Or this?
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
AbacusIs a simple device to aid in
calculating.This is an Inca Quipu.png1
And a Roman Abacus2
14th edition of the Meyers Konversationslexikon 18882Reconstruction of a Roman Abacus, made by the RGZ Museum in Mainz, 1977
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
AbacusMany countries still use Abacuses
in day- to-day sales calculations
http://www.flickr.com/photos/todbaker/2305853928
©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
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
Slide ruleWhile 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
©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.
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
The Blackbird set a coast-to-coast record time of 67 minutes 54 seconds.
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
Mechanical computers
http://commons.wikimedia.org/wiki/File:Curta_Mechanical_computer_img_1651.jpg
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
Univac
http://www.flickr.com/photos/diorama_sky/2902656083/
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
Modern Computer
http://commons.wikimedia.org/wiki/File:Dell_Desktop_Computer_in_school_classroom.jpg
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
Vacuum Tubes
http://www.flickr.com/photos/nickames/4081648117/
©2010 Akula LLC, Jeremy R. Hertzberg, BS CMPE
Transistor
http://www.flickr.com/photos/oskay/2105641530
