Which calculator model, first released in 1972, is credited with making scientific calculators affordable for students and became one of the best-selling educational products of all time?

The history of calculation tools represents one of the most significant retail success stories in educational products. From ancient counting boards to modern graphing calculators, these devices have transformed how we learn and apply mathematics. This trivia question explores a pivotal moment in calculator retail history that revolutionized mathematics education and accessibility.

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• Hewlett-Packard HP-35
• Texas Instruments TI-30
• Casio fx-7000G
• Sharp EL-500

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