Which groundbreaking retail payment technology was invented by IBM engineers in the 1970s but didn't see widespread adoption until the 1980s?

The evolution of retail payment systems has transformed how consumers interact with products and services. From physical cash to digital wallets, each innovation has opened new possibilities for merchants and shoppers alike. This trivia question explores a pivotal moment in payment technology that fundamentally changed retail transactions worldwide. Test your knowledge about the invention that bridged traditional commerce and the digital age!

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