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

In the world of mathematics and computing, certain product launches have revolutionized how we calculate, analyze data, and solve complex problems. One particular breakthrough in the 1970s changed the landscape of mathematical education and professional computation forever. Test your knowledge about this pivotal moment in mathematical technology history!

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• HP-35 Scientific Calculator
• TI-30 Calculator
• Casio fx-7000G
• Sharp EL-500

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