Which retail technology innovation was first introduced by IBM in 1974, fundamentally changing how customers check out and how retailers track inventory?

The history of retail is filled with inventions and discoveries that transformed how we shop. From innovative payment systems to revolutionary marketing strategies, these breakthroughs shaped modern commerce. This trivia question explores a significant invention that changed retail customer engagement forever. Can you identify the correct answer among these retail technology milestones?

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RFID (Radio-Frequency Identification) tags
UPC barcodes and optical scanners
Electronic cash registers with digital displays
Self-checkout kiosks