Which retail innovation, invented in 1951 but not commercially implemented until 1974, used a pattern of parallel lines that could be optically scanned to revolutionize inventory tracking and checkout?

The retail landscape has been transformed by groundbreaking inventions and discoveries throughout history. From barcode scanners to online shopping platforms, these innovations have revolutionized how we shop and interact with products. This trivia question tests your knowledge about a pivotal retail technology that fundamentally changed inventory management and the checkout experience worldwide. Do you know which invention truly revolutionized retail efficiency?

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The Universal Product Code (UPC) barcode system
The magnetic stripe credit card reader
The electronic cash register (ECR)
The RFID (Radio-Frequency Identification) tag