Which of these retail technology innovations was invented first and revolutionized how products are identified and tracked in stores?

The retail landscape has been transformed by numerous technological innovations throughout history. Some inventions completely revolutionized how consumers shop and how retailers operate. This poll tests your knowledge of a pivotal retail technology discovery that fundamentally altered the industry and set the foundation for modern shopping experiences. Can you identify which groundbreaking retail technology came first and changed commerce forever?

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The barcode scanner (first used commercially at an Ohio Marsh supermarket in 1974)
RFID inventory tracking (first widely implemented in retail in the early 2000s)
Electronic point-of-sale (EPOS) systems (first mainstream retail adoption in the mid-1980s)
NFC contactless payment technology (first widespread retail use in 2011)