Which ancient technology served as the world's first retail receipt system, used by Mesopotamian merchants around 3000 BCE?

Before digital cash registers and blockchain transactions, ancient civilizations developed sophisticated methods to track commercial exchanges. Their innovations in record-keeping laid the groundwork for modern retail payment systems. This trivia question explores how ancient Mesopotamian merchants documented transactions nearly 5,000 years ago, revealing the ingenious solutions they created to address challenges we still face today in retail.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Clay tablets with cuneiform markings recording quantities of goods, prices, and merchant identifiers
Papyrus scrolls with hieroglyphic symbols indicating transaction details
Knotted rope systems (quipu) that encoded numerical values of transactions
Bamboo strips with carved pictograms representing goods exchanged