Which company's 1990s graphing calculator product launch revolutionized mathematics education with a device that remains virtually unchanged in design and maintains significant market share to this day?

The world of mathematics education was forever changed by the introduction of graphing calculators in the classroom. These powerful tools transformed how students visualize and interact with mathematical concepts, creating an entire industry of educational technology. Test your knowledge about one of the most significant product launches in mathematics education history!

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Texas Instruments with the TI-83/84 series
Casio with the fx-CG50 series
HP with the Prime series
Sharp with the EL-9900 series