Which geographic region first widely adopted mobile payment-integrated POS systems that allowed retailers to complete transactions anywhere in the store?

Test your knowledge about how retail point-of-sale (POS) systems have evolved differently across geographic regions. The global retail landscape has seen fascinating regional variations in POS technology adoption based on unique cultural, economic, and infrastructure factors. This question explores which region pioneered a significant POS innovation that changed retail operations worldwide.

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East Asia (specifically South Korea and Japan)
North America (United States and Canada)
Northern Europe (Scandinavian countries)
Middle East (UAE and Saudi Arabia)