Persistent Technology
Monday 11 August 2014
My Classic Collection of HP Calculators is Growing
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Here's a quick picture of my HP calculator Classic series collection. OK, the HP-67 (bottom left) is technically not from the Classi...
Monday 11 November 2013
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Interesting Accuracy Feature of the HP-35 (Reproduced from November 1976 issue of HP Journal. Thanks Eric Smith for reference to this ...
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My HP Classic Family Grows! My 1973 production HP-80 (left) now has an older brother, a 1972 production HP-35, received today from a ...
Wednesday 23 October 2013
Hewlett-Packard HP-80
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The World’s First Businessman’s Pocket Calculator Introduction Hewlett-Packard redefined portable computing with...
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