Which retail invention, first used commercially in 1974 on a pack of Wrigley's gum, was described by the Smithsonian as one of the '50 inventions that revolutionized our lives'?

The retail landscape has been transformed by groundbreaking inventions and discoveries throughout history. From the first barcode scanner to sophisticated e-commerce platforms, retail technology has continuously evolved to enhance shopping experiences. This trivia question tests your knowledge about a pivotal invention that fundamentally changed how retailers track inventory and process purchases worldwide.

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Universal Product Code (UPC) barcode
Electronic cash register (ECR)
Radio-frequency identification (RFID) tag
Point of sale (POS) credit card terminal