Which of these retail IoT innovations was first introduced to the market, revolutionizing the shopping experience?

The Internet of Things (IoT) has transformed the retail landscape in remarkable ways. From inventory management to customer experience, smart devices have created entirely new shopping paradigms. This poll tests your knowledge of a groundbreaking IoT retail innovation that fundamentally changed how we shop and how retailers operate. Can you identify which revolutionary technology came first and set the stage for today's connected retail environment?

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Amazon Go's 'Just Walk Out' technology (2016)
RFID inventory tracking in retail stores (1999)
Smart shopping carts with built-in scanners (2010)
Bluetooth beacons for in-store customer notifications (2013)