Which inventory tracking technology, first used commercially in 1974 at an Ohio supermarket, revolutionized retail by allowing automated product identification and inventory management?

The history of retail has been shaped by technological innovations that revolutionized how businesses track and manage their inventory. Before digital systems, various methods were employed to keep track of products - some ingenious, others painfully inefficient. One particular invention in the mid-20th century changed retail forever, creating the foundation for modern inventory management. Test your knowledge of this pivotal moment in retail history!

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Universal Product Code (UPC) barcode scanning system
IBM's Hollerith punch card inventory system
NCR's mechanical cash register with inventory tracking
Kardex rotary card file system