Which groundbreaking calculator, launched in 1972, was the first to use Reverse Polish Notation (RPN) and became a staple tool for engineers and mathematicians?

The mathematical tools industry has transformed how we learn, teach, and apply mathematics. From ancient abacuses to cutting-edge software, these products have shaped mathematical education and practice. This poll tests your knowledge about a significant product launch that revolutionized how students and professionals approach complex mathematics.

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HP-35
TI-30
Casio fx-7000G
Sharp EL-5100