Which retail technology innovation, first used commercially in 1974 on a pack of Wrigley's gum, paved the way for modern recommendation systems by enabling the first comprehensive collection of purchase data?

Before modern retail recommendation systems transformed how we shop online, early innovations in retail technology laid important groundwork. One particular invention revolutionized inventory management and dramatically accelerated checkout processes in physical stores worldwide. Test your knowledge about this pivotal retail technology that bridged traditional commerce with the digital age.

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Universal Product Code (UPC) barcode scanning
Electronic Article Surveillance (EAS) anti-theft tags
Point-of-Sale (POS) credit card terminals
Electronic shelf labels (ESL) with digital pricing