Which ancient civilization invented the world's first known retail receipt system, using clay tablets to record purchases and track inventory around 3000 BCE?

Before modern malls and e-commerce, ancient civilizations created sophisticated marketplaces that revolutionized how people bought and sold goods. These early retail innovations shaped commerce for millennia to come and established principles still used in product design and merchandising today. Test your knowledge about the pioneering retail developments of the ancient world!

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Ancient Sumerians in Mesopotamia
Ancient Egyptians along the Nile
Indus Valley civilization in South Asia
Ancient Chinese in the Yellow River region