Which of these product innovations was first introduced in 1974 by Marsh Supermarket and completely revolutionized retail checkout systems worldwide?

The retail landscape has been transformed by groundbreaking inventions and discoveries throughout history. These innovations have revolutionized how products are sold, purchased, and delivered to consumers. Test your knowledge about a significant product innovation that dramatically altered the retail industry and continues to impact how we shop today. Can you identify the correct invention from its original implementation?

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Universal Product Code (UPC) barcode scanning system
Electronic point-of-sale (EPOS) touch screen terminals
Self-checkout kiosks with automated payment processing
Near-field communication (NFC) contactless payment technology