Which retail payment innovation was first unveiled at the National Cash Register (NCR) sales convention in 1973, forever changing how products were identified and priced at checkout?

Before credit cards and mobile payments revolutionized how we shop, retail payment systems evolved through several technological breakthroughs. One invention in particular transformed retail operations and customer experience forever, creating the foundation for today's automated checkout systems. Test your knowledge about this pivotal moment in retail payment history that bridged mechanical cash registers with the digital payment era we know today.

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The Universal Product Code (UPC) barcode system
The magnetic stripe credit card reader
The electronic signature pad
The PIN pad for debit transactions