The HP 65 Programmable Pocket Calculator - HP History

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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

For Sale : HP 65 Programmable Scientific Calculator. Condition : Used / Tested & Working. This is a good one with nothing negative to note, you wont

Vintage HP 65 LED Scientific Calculator Programmable TESTED & WORKING

The HP-35

HP-35 - Wikipedia

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Calculator Archives - HPCA Archives Virtual Vault

The HP-35

Calculator Archives - HPCA Archives Virtual Vault

HP-65

The HP 65 Programmable Pocket Calculator - HP History