Which IoT-enabled retail technology, invented in the 1970s but widely adopted in the 2000s, uses radio waves to track inventory without line-of-sight and is considered one of retail's most transformative innovations?

The Internet of Things (IoT) has dramatically transformed the retail landscape, creating seamless shopping experiences through connected devices and systems. One groundbreaking IoT innovation has particularly revolutionized inventory management, enabling retailers to track products with unprecedented accuracy and efficiency. Test your knowledge about this game-changing retail technology that emerged from a humble barcode evolution.

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RFID (Radio-Frequency Identification)
NFC (Near Field Communication)
ESL (Electronic Shelf Labels)
BLE (Bluetooth Low Energy) Beacons