Which historic point-of-sale innovation, introduced in 1974, revolutionized retail by eliminating manual price entry and laying the groundwork for modern inventory systems?

Before digital systems transformed retail, point-of-sale technology evolved through several revolutionary stages that fundamentally changed how businesses operated. The history of these systems reflects broader technological and economic developments throughout the 20th century. This trivia question explores a pivotal moment in retail history that set the foundation for modern checkout experiences we take for granted today.

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The Universal Product Code (UPC) barcode system
IBM's Electronic Cash Register Model 3653
NCR's Class 5 mechanical cash register with receipt printing
The Sweda credit card imprinter system