Which inventory management technology was invented by Norman Joseph Woodland and Bernard Silver in 1951 but wasn't widely adopted in retail until the 1970s?

The world of retail has been transformed by numerous inventions and technological discoveries over the decades. From barcode scanners to sophisticated inventory management systems, these innovations have revolutionized how businesses track, manage, and sell their products. This trivia question focuses on a breakthrough invention that fundamentally changed retail inventory management and shopping experiences worldwide. Test your knowledge of retail technology history!

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Barcode system
RFID tags
Electronic shelf labels
Point-of-sale (POS) terminals