The Hewlett-Packard 65, the first pocket programmable calculator, and it's successor(s), the Hewlett-Packard 67 and Hewlett-Packard 97. : r/calculators
Hewlett Packard HP-65 calculator working. - YouTube
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HP 65
HP 65 - 100 step programmable with programs stored on magnetic cards smaller than a stick of gum. | Mobile computing, Old calculator, Old computers
HP Virtual Museum: Hewlett-Packard-65 programmable pocket calculator, 1974
ArtStation - Hewlett-Packard HP-65 Calculator
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Haul (HP-35, HP-65, HP-41CX) : r/calculators
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1974 HP-65 Calculator playing Lunar Lander Game! - YouTube
File:Vintage HP-65 Programmable Handheld LED Calculator, Original Price - $795, Made in the USA, Circa 1974 (8510806457).jpg - Wikimedia Commons
