Which retail company's innovation lab developed and implemented the first commercially successful 'Just Walk Out' cashierless shopping technology?

Behind many of today's most remarkable shopping experiences are retail innovation labs - specialized teams and facilities where companies experiment with cutting-edge technologies and concepts before mainstream deployment. These labs represent significant investment but can dramatically reshape customer experiences and operational efficiency. How well do you know the pioneering work happening in these retail innovation incubators?

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

Amazon (via Amazon Go)
Walmart (via Store No. 8)
Target (via Target Forward)
Kroger (via Kroger Labs)