Which groundbreaking IoT retail technology was first widely implemented in the early 2000s, allowing stores to track product movement and customer behavior without human intervention?

The Internet of Things (IoT) has transformed modern retail operations and customer experiences. From inventory management to personalized shopping, IoT devices have created unprecedented connections between the physical and digital retail worlds. This trivia question explores a pivotal moment in retail IoT history that changed how retailers collect and utilize customer data. Test your knowledge about this significant technological advancement that continues to shape retail strategy today.

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RFID (Radio-Frequency Identification) tags
Facial recognition cameras
Smart shopping carts
Bluetooth beacons