Which retail payment innovation was first introduced by IBM in 1973 and revolutionized checkout efficiency before becoming universal in stores worldwide?

The evolution of retail payment systems has transformed the shopping experience over the decades. From cash registers to contactless payments, each innovation has shaped consumer behavior and retail strategies. This trivia question explores a pivotal moment in payment technology that fundamentally altered the retail landscape and consumer expectations. Test your knowledge of the financial technologies that power modern commerce!

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Universal Product Code (UPC) barcode scanning
PIN-based debit card transactions
Electronic signature pads for credit cards
Self-checkout kiosk technology