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The Hewlett-Packard 65, the first pocket programmable calculator, and it's successor(s), the Hewlett-Packard 67 and Hewlett-Packard 97. : r/calculators
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Hewlett Packard 97 S I/O Calculator Part 1 - YouTube
HP Virtual Museum: Hewlett-Packard-97 programmable printing calculator, 1976
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HP-67/-97 - Wikipedia
This calculator was introduced alongside the pocket HP 67 as a step... News Photo - Getty Images
Hewlett-Packard HP-97 Calculator - Calculator - Computing History
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The HP 97 Calculator: A Built-In Printer - HP History
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Vintage Hewlett-Packard HP 97 Programmable Calculator Surveying Pac 1 Standard | eBay