Which company's graphing calculator, introduced in 1990, became so dominant in mathematics education that it achieved over 80% market share in US high schools and remained virtually unchanged in design for over 25 years?

The introduction of graphing calculators transformed mathematics education in the late 20th century, making complex visualizations accessible to students. These devices sparked debates about technology's role in math education while creating a competitive market worth billions. This poll tests your knowledge about a pivotal moment in the history of educational technology that changed how we teach and learn mathematics.

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Texas Instruments (TI-82/83/84 series)
Casio (fx-9860 series)
Hewlett-Packard (HP Prime series)
Sharp (EL-9900 series)