Which technology innovation first allowed retailers to automatically scan product information at point of sale rather than manually entering prices?

Point of sale (POS) systems have evolved dramatically from simple cash registers to sophisticated retail management platforms. Modern POS systems integrate inventory tracking, customer relationship management, and even predictive analytics. This trivia question tests your knowledge of a pivotal moment in retail technology history that fundamentally changed how businesses process transactions and manage customer interactions.

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The Universal Product Code (UPC) barcode system, first used commercially in 1974 on a pack of Wrigley's gum
IBM's magnetic stripe reader technology, introduced in 1968 for bank cards
NCR's electronic cash register with digital price lookup, launched in 1982
RFID tag scanning, first implemented by Walmart for inventory in 1991