Which invention, first patented in 1952 but not widely adopted in retail until the 1970s, revolutionized supply chain management by enabling automated tracking of inventory?

Supply chain management in retail has evolved dramatically due to key technological inventions throughout history. These innovations have transformed how products move from manufacturers to consumers, reducing costs and improving efficiency. This poll tests your knowledge about a pivotal invention that fundamentally changed retail logistics and is now ubiquitous in the industry. Do you know which technology created the foundation for modern inventory tracking and management?

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The barcode (Universal Product Code)
The cash register
The shipping container
The conveyor belt system