Hewlett Packard HP-35
HP Virtual Museum: Hewlett-Packard-35 scientific calculator handheld scientific calculator, 1972
Milestones:Development of the HP-35, the First Handheld Scientific Calculator, 1972 - Engineering and Technology History Wiki
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HP-35 - Wikipedia
HP-35
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Hewlett Packard HP-35
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HP 35
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HP-35
HP 35s Scientific Calculator
The HP-35
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HP 35 - The world's first pocket scientific calculator from 1972 - YouTube
