Which invention, first used commercially in a U.S. supermarket in 1974, revolutionized retail inventory tracking and is considered the precursor to modern IoT retail systems?

In the world of retail, few inventions have transformed inventory management as dramatically as automatic identification systems. Before digital databases and cloud computing, a groundbreaking invention in the 1970s forever changed how products were tracked and sold. This innovation enabled retailers to instantly identify products, track inventory, and streamline checkout processes—setting the foundation for today's sophisticated IoT retail environments. Test your knowledge about this revolutionary retail technology!

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UPC Barcode Scanner
Electronic Cash Register (ECR)
RFID Tag System
Magnetic Inventory Strip