Which ancient civilization created the first known systematic retail inventory management system using clay tokens and bullae (sealed clay envelopes) as early as 7500 BCE?

Before modern retail analytics, ancient civilizations developed sophisticated methods to track trade, inventory, and consumer preferences. From Mesopotamian clay tablets recording transactions to Roman market surveys, data-driven decision making has ancient roots. This poll explores how our ancestors used primitive but effective forms of retail data analytics to optimize their commercial enterprises thousands of years ago.

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Mesopotamian civilization (in modern-day Iraq)
Ancient Egyptian civilization
Indus Valley civilization
Ancient Chinese civilization