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HP-65 programmable pocket calculator, 1974


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The HP-65 was the first programmable pocket calculator.

The HP-65 was HP's fourth handheld electronic calculator and its third scientific calculator.

Nicknamed "Superstar," the HP-65 was the first magnetic card-programmable handheld calculator, which is why some call it the "world's first handheld computer." The HP-65 could read from and write to magnetic cards, allowing the user to buy program cards from HP or save programs on cards.

Although the HP-65 was similar to the HP-35, HP's first handheld scientific calculator, new features included a card reader, the slot to hold a card below the display and the second slider switch to select program or run modes. The HP-65 cost $795 when it was introduced.

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