Which retail technology innovation first enabled stores to track customer movement patterns using scientific heat-mapping techniques?

The intersection of science and retail has transformed how we shop and analyze consumer behavior. Advanced technologies like AI, machine learning, and IoT are revolutionizing retail analytics and customer experiences. This trivia tests your knowledge about a groundbreaking retail technology that changed how scientific data is used to understand shopping patterns. Do you know which innovation marked a major shift in retail analytics?

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

RFID inventory tracking systems (2001)
In-store customer traffic sensors (2007)
NFC payment terminals (2011)
Facial recognition shopping systems (2016)