Which invention, patented in 1949 but not commercially implemented until 1974, revolutionized retail inventory management and is estimated to save retailers billions annually?

The retail landscape has been transformed by numerous inventions and discoveries throughout history. From barcode scanners to recommendation algorithms, these innovations have revolutionized how we shop and how retailers operate. This poll tests your knowledge about a significant invention that dramatically altered the retail supply chain and shopping experience worldwide. Think about the technologies that made modern commerce possible as you consider your answer!

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Universal Product Code (UPC) barcode
Electronic Article Surveillance (EAS) anti-theft tags
Electronic Point of Sale (EPOS) systems
Radio-Frequency Identification (RFID) tags