Which calculator company first introduced the graphing calculator as a mass-market product for mathematics education in 1985, creating a new product category that still dominates math classrooms today?

In the world of mathematics education and professional tools, calculators revolutionized how we solve problems. Their development represents one of the most significant retail success stories in academic and professional tools. Test your knowledge about this transformative mathematical product that changed classrooms and offices worldwide!

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• Texas Instruments with the TI-81
• Casio with the fx-7000G
• Hewlett-Packard with the HP-28C
• Sharp with the EL-5200

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