Which company first introduced the handheld electronic calculator that could perform all four basic arithmetic operations and fit in a pocket?

The handheld calculator revolutionized mathematical computation, making complex calculations accessible to everyone. Before electronic calculators became mainstream, mathematical computations relied on slide rules, mechanical calculators, or manual calculations. The introduction of the electronic calculator marked a significant shift in how mathematics was taught and applied in everyday scenarios. Test your knowledge about this groundbreaking mathematical product innovation!

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• Texas Instruments with the Caltech calculator
• Hewlett-Packard with the HP-35
• Sharp with the EL-8
• Busicom (later manufactured by Intel) with the Handy LE-120A 'Handy-LE'

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