Which IoT technology was first implemented by Amazon in their Amazon Go stores to enable the revolutionary 'Just Walk Out' shopping experience?

The Internet of Things (IoT) is transforming scientific approaches to retail operations. From smart shelves that monitor inventory in real-time to advanced analytics that predict consumer behavior with remarkable precision, retail IoT represents a fascinating intersection of computer science, data analytics, and consumer psychology. This poll tests your knowledge about cutting-edge IoT technologies that are revolutionizing the scientific approach to retail management and customer experience.

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RFID tag-based inventory tracking
Computer vision and sensor fusion systems
Bluetooth Low Energy (BLE) beacons for customer tracking
NFC-enabled smart shopping carts