Which calculator company was the first to successfully mass-market graphing calculators for education, revolutionizing math classrooms in the 1990s?

The calculator market has transformed mathematics education and professional practice over the decades. From slide rules to graphing calculators to advanced computational software, these tools have shaped how we learn and apply mathematics. This poll tests your knowledge about a pivotal product that changed how students and professionals approach mathematical problems.

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Texas Instruments (with the TI-81/82/83 series)
Casio (with the fx-7000G)
Hewlett-Packard (with the HP-28 series)
Sharp (with the EL-9300 series)