Electronic Pocket Calculators
The Road to the Electronic Pocket Calculators


Abacus




Image 3: An Abacus
 Prototype Calculator
Image 4 : "Cal-Tech" Prototype
 Graphing Calculators
Image 5:  Graphing Calculators
Antecedents
 Invention History
 Impact
technological predecessors

on the modern world


home
 invention
 endnotes
 bibliography

Site created by Kristen Smith -- ksmit2th@umw.edu -- Last updated 4-14-05
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