Which pioneering payment innovation was first introduced by IBM in 1973, initially called the 'Uniform Product Code' system before becoming ubiquitous in retail?

The world of retail payment systems has evolved dramatically through groundbreaking inventions and discoveries. From cash registers to contactless payments, these innovations have transformed how we shop and pay for goods. This trivia question explores a pivotal moment in payment technology history that changed the retail landscape forever. Test your knowledge of the inventions that shaped modern commerce!

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Barcode scanning technology
Magnetic stripe credit card readers
Electronic cash registers (ECR)
Near-field communication (NFC) payment terminals