Which retail payment innovation was first introduced by IBM in 1973 that fundamentally changed in-store shopping experiences?

The way we pay for goods and services has undergone dramatic transformation over the decades. From cash to contactless, payment systems reflect both technological innovation and changing consumer preferences. This trivia question explores a key milestone in the development of modern retail payment systems that revolutionized how businesses process transactions and how consumers shop.

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Universal Product Code (UPC) barcode scanning system
Electronic signature pads for credit card transactions
Chip-based EMV payment cards
NFC (Near Field Communication) contactless payment terminals