Which two calculator companies merged in 1990, combining their educational and scientific calculator lines to create one of the most influential brands in mathematics education?

The handheld calculator transformed mathematics education and professional computation in the 20th century. As technology advanced, calculator companies competed, collaborated, and sometimes merged to dominate this lucrative market. This poll tests your knowledge about a significant merger that reshaped the scientific calculator landscape and influenced how mathematics would be taught in classrooms worldwide.

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Texas Instruments and Hewlett-Packard
Casio and Sharp
Texas Instruments and Unicom
Casio and Citizen