Which retail technology innovation, first widely adopted in department stores during the 1880s, revolutionized transaction processing and helped establish modern retail operations?

Department stores revolutionized retail history with technological innovations that shaped modern shopping. From the earliest cash registers to primitive loyalty schemes, these establishments pioneered retail technologies we now take for granted. This trivia question explores a significant historical retail technology advancement that transformed commerce in the late 19th century. Test your knowledge about the evolution of retail technology that bridged traditional mercantilism with modern shopping experiences.

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The mechanical cash register with transaction recording capabilities
Pneumatic tube systems for payment transport
Punch card customer loyalty tracking systems
Electric window display lighting systems