Which retail technology invention, first used commercially in 1974, was inspired by Morse code and revolutionized inventory management and checkout operations worldwide?

In the world of retail inventions and discoveries, one innovation transformed how products move from warehouses to stores, fundamentally changing retail operations forever. This invention revolutionized inventory management, reduced manual labor, and dramatically increased efficiency. Today, it's something we take for granted in almost every retail environment, but when first introduced, it represented a paradigm shift in how products were tracked, sorted, and sold. Test your knowledge about this game-changing retail technology!

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Universal Product Code (UPC) barcode scanning
Electronic shelf labels (ESL)
Radio-frequency identification (RFID) tags
Point-of-sale (POS) touch screen terminals