Which Texas Instruments graphing calculator model, introduced in 1990, became so iconic in mathematics education that it achieved over 90% brand recognition among high school and college students by the early 2000s?

Texas Instruments revolutionized mathematics education with their graphing calculators, creating one of the most recognizable brands in educational technology. Their calculators have become essential tools in classrooms worldwide, with a fascinating corporate history that spans decades of innovation. Test your knowledge about this iconic mathematical tool that transformed how students learn and apply advanced mathematics concepts.

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TI-83
TI-85
TI-82
TI-81