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Hand-held Calculators

Hand-held Calculators
Hand-held Calculators

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The devices that ended the three hundred year supremacy of the logarithm table. Early examples were comparatively power hungry and had a very limited battery life. They were frequently used with mains adaptors. The development of low power integrated circuits and in particular, liquid crystal displays meant that calculators at last became truly portable.

Top row, from left to right

Front row - some novelties - left to right:

hyper intelligent being A final word ...
Hyper intelligent beings don't need calculators.
hyper intelligent being

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Revised: 18-SEP-2003
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