Which retail technology product, first introduced in 1972, revolutionized mathematics education by making graphical calculation accessible to students and became a staple in classrooms worldwide?

The retail landscape for mathematical tools has transformed dramatically over centuries. From basic counting devices to sophisticated digital platforms, the evolution of math products represents humanity's journey in quantitative thinking. This poll tests your knowledge about a significant retail technology milestone that revolutionized mathematical education and professional computing in the late 20th century.

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Hewlett-Packard HP-35, the first scientific pocket calculator
Texas Instruments TI-30, the first affordable scientific calculator for schools
Texas Instruments graphing calculator (TI-81), which brought visual math to classrooms
Casio fx-7000G, the world's first commercially available graphing calculator