Which of these mathematical calculation tools was first marketed specifically for mathematics education in schools during the 1980s and featured the slogan 'Technology for the mathematics classroom'?

Before digital calculators and computers revolutionized mathematical calculations, various physical tools and products helped mathematicians, engineers, and scientists solve complex problems. These innovative products shaped how mathematics was practiced and taught for generations. Test your knowledge about these historical mathematical products that changed how we approach calculation and problem-solving.

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TI-81 Graphing Calculator by Texas Instruments
Hewlett-Packard HP-35 Scientific Calculator
Casio fx-7000G Graphing Calculator
Sharp EL-5100 Programmable Calculator