Which calculator company was the first to mass-produce and successfully market graphing calculators for educational use in the 1980s, revolutionizing math education?

The evolution of calculators transformed mathematics education and professional practice. From basic arithmetic to advanced scientific functions, calculator brands have competed fiercely to innovate and capture market share. This poll tests your knowledge about a pivotal moment in calculator brand history that changed the mathematics product landscape forever.

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