Kathryn Mayo

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Kathryn Mayo

• English 334

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Sorry, Wrong!
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History of Computer Science
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From prehistory tocomputers to the internet
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Ethnological and Psychological Origins of Numbers
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Domestic animals notice one item missing from a
small set
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Goldfinches distinguish between piles of seed

• 3 and 1
• 3 and 2
• 4 and 2
• 4 and 3
• 6 and 3

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The story of the crow
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Childhood development

• Sensory motor period
• Pre-operative period
• Intuitive period
• Stage of concrete operations
• Formal functions

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Born with few innate abilities
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One, two, many
Toddlers
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Real counting only after languagedevelopment
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one, two many
Australian
Australian
Yanomamo
Botocudos
Zulu
Bushmen
Vedda
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How Cro-Magnon Man Counted
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pebbles, shells, hard fruit, small sticks
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3 stages of development

• only lowest numbers grasped
• names of the body parts start to mean something
  else
• numbers get names

two
three
one
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The limits of perception
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Grouping of 5 lines found all over the world
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Early ways of counting on the fingers
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Knuckles and joints
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Counting on the body
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Morra mentioned through history
still played in Italy, Southeast France,
Morocco hua quan in China, Mongolia Rabelais,
Malherbe Greece vases Egyptian tombs
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The Game of Morra
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Numbers on Strings
quipu
Inca
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numbers, value and money

• barter
• objects given a value of a certain number of
  debens
• cheating kept money from being used
• government had to take over minting money

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Base Numbers and the Birth of Number-Systems
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Why base 10 ?