Which retail technology innovation, first commercially implemented in the 1970s, used optical scanning to automate checkout and revolutionized inventory management?

Throughout history, retail technology has transformed how merchants conduct business. One particular innovation revolutionized transaction processing and inventory management, creating the foundation for modern retail operations. This poll tests your knowledge about a pivotal technological development that changed retail forever and continues to evolve with each generation of commerce.

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Universal Product Code (UPC) barcode system
Electronic Funds Transfer (EFT) terminals
Mechanical cash register with receipt printing
Radio Frequency Identification (RFID) tags