Which early point-of-sale innovation from the 1880s revolutionized retail by creating the first mechanical system to record sales transactions and track inventory?

Throughout history, retail transactions have evolved dramatically from simple bartering to sophisticated digital systems. Point-of-sale technology represents one of the most significant innovations in retail history, transforming how merchants track inventory, process payments, and understand customer behavior. Test your knowledge about the historical development of these crucial retail systems that have shaped commerce as we know it today.

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The Ritty 'Incorruptible Cashier' (the first cash register)
The Hollerith Tabulating Machine
The Burroughs Adding Machine
Edison's Stock Ticker