Which groundbreaking invention first allowed retail POS systems to automatically read product information without manual input?

Point of Sale (POS) systems have transformed how retailers conduct business, from simple cash registers to sophisticated transaction hubs. The evolution of these systems marks significant technological milestones in retail history. This trivia question explores a pivotal invention that revolutionized checkout efficiency and accuracy worldwide. Test your knowledge about the technological breakthroughs that shaped modern retail operations!

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• The Universal Product Code (UPC) barcode, first commercially scanned on a pack of Wrigley's gum in 1974
• The magnetic stripe reader, introduced by IBM for retail transactions in 1969
• The electronic touchscreen interface, developed by NCR for retail in 1983
• The RFID tag system, first implemented in Walmart stores in 1992

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