Which company introduced the first widely successful point-of-sale (POS) credit card terminal that electronically authorized transactions in real-time, revolutionizing retail payments in the 1980s?

The evolution of retail payment systems has transformed how businesses operate and consumers shop. From cash registers to contactless payments, each innovation has shaped retail economics and consumer behavior. This trivia question explores a pivotal moment in payment technology history that fundamentally changed retail operations worldwide. Test your knowledge about the financial infrastructure that powers modern commerce!

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VeriFone (with its ZON terminal)
IBM (with its 4690 Retail Transaction System)
NCR Corporation (with its DataKash system)
Digital Equipment Corporation (with its DECTransaction system)