Which pricing technology, invented in 1974, allowed retailers to automatically track inventory and eliminate the need for individual price tags on items?

In the world of inventions and discoveries, some innovations completely transform how products are sold. One particular pricing innovation from the 1970s revolutionized retail by making products more accessible to consumers while giving merchants new ways to compete. This poll tests your knowledge of retail history and how certain inventions changed the way we buy and sell products today.

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Universal Product Code (UPC) barcode system
Electronic Shelf Labels (ESL)
Radio-Frequency Identification (RFID) tags
Digital Price Scanner (DPS)