Which invention, first used in a Cincinnati supermarket in 1974, revolutionized retail inventory management by automating product identification?

Before computerized systems revolutionized retail, inventory management was a manual and often inaccurate process. One particular invention in the mid-20th century fundamentally transformed how products were tracked and sold, creating the foundation for modern retail operations. This discovery not only streamlined checkout processes but also provided unprecedented data on consumer purchasing patterns. Test your knowledge about this pivotal retail technology that bridged the gap between traditional commerce and today's sophisticated inventory systems.

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Universal Product Code (UPC) barcode system
Electronic shelf labels (ESL)
Radio-frequency identification (RFID) tags
Point-of-sale (POS) credit card terminal