Which retail innovation was first introduced by James Ritty in 1879 to prevent employee theft and was later purchased and commercialized by John H. Patterson's National Cash Register Company?

Retail technology innovations have transformed how we shop over the decades. Some inventions created entirely new shopping paradigms, while others quietly revolutionized the customer experience behind the scenes. This trivia question focuses on a pivotal retail innovation that fundamentally changed commerce. Test your knowledge of retail history and the technologies that shaped modern shopping experiences!

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The mechanical cash register
The automated checkout scanner
The electronic inventory management system
The anti-theft security tag