Which retail payment innovation was first introduced by IBM in 1973 that revolutionized checkout efficiency?

The way we pay for products has transformed dramatically over the decades. From cash registers to contactless payments, retail payment systems have evolved to meet consumer demands for speed, security, and convenience. This trivia question explores a pivotal innovation that changed how we complete transactions in stores worldwide. Test your knowledge about the technology that bridged traditional checkout systems and today's mobile payment solutions!

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Universal Product Code (UPC) barcode scanning
PIN-based debit card transactions
Electronic signature capture pads
RFID inventory tracking systems