Which retail company's innovation lab created 'Just Walk Out' technology, allowing customers to shop without traditional checkout?

Innovation labs have become critical assets for major retailers seeking to stay competitive in the rapidly evolving retail landscape. These dedicated spaces allow companies to experiment with emerging technologies, test new shopping concepts, and develop solutions for changing consumer behaviors before full-scale implementation. How well do you know which retail giants are pioneering these innovation hubs and what groundbreaking work they're doing?

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Amazon (via Amazon Go Team)
Walmart (via Store No. 8)
Target (via Target Forward)
Kroger (via Kroger Technology & Digital Innovation Lab)