Which retailer launched and widely implemented its cashier-less, contactless shopping technology 'Just Walk Out' in physical stores before the 2020 pandemic?

The retail landscape underwent a massive transformation during the 2020 pandemic, with contactless shopping technologies suddenly becoming essential rather than optional. While many retailers scrambled to adapt, one company had already pioneered and widely implemented contactless checkout technology years before it became a necessity. Test your knowledge about which retail giant was ahead of the curve in revolutionizing how we shop.

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Amazon (with Amazon Go stores)
Walmart (with Walmart Go)
Target (with FastLane)
Apple (with Apple Express)