Which calculator innovation first allowed retail businesses to perform complex calculations without specialized training, revolutionizing inventory and pricing management in the 1970s?

Before smartphones and computers, specialized calculating devices transformed retail mathematics. From basic arithmetic to complex calculations, these tools revolutionized inventory management, pricing strategies, and financial planning in retail environments. This poll tests your knowledge about a pivotal moment in retail mathematical technology that changed how stores operated their daily calculations and accounting processes.

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The HP-35 scientific calculator, which introduced reverse Polish notation to simplify retail stock calculations
The Casio Mini electronic calculator, which brought affordable calculation technology to small retail businesses
IBM's retail-specific 3660 supermarket system with integrated mathematical processing capabilities
Texas Instruments' SR-10 slide rule calculator, designed specifically for retail inventory control