Which invention, first implemented in a retail setting in 1974, revolutionized data analytics by allowing stores to automatically collect detailed product information at checkout?

The field of retail data analytics has revolutionized how businesses understand consumer behavior and optimize their operations. Before sophisticated AI and machine learning systems became commonplace, several pioneering technologies laid the groundwork for today's retail intelligence. This poll explores a pivotal invention that transformed retail data collection and analysis, setting the stage for the personalized shopping experiences we know today.

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Universal Product Code (UPC) barcode scanner
Electronic cash register with digital receipt capability
Magnetic stripe reader for credit card transactions
Automated inventory management system (AIMS)