Which retail innovation, introduced in 1937, revolutionized grocery shopping by allowing customers to select their own items rather than having clerks gather products for them?

Throughout history, retail has experienced revolutionary innovations that transformed how we shop. From ancient marketplaces to modern digital commerce, these technological and conceptual breakthroughs have shaped consumer behavior and business strategies. Test your knowledge about a groundbreaking retail innovation that changed shopping forever and continues to influence modern retail experiences.

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Self-service shopping carts (invented by Sylvan Goldman for Humpty Dumpty supermarkets)
Barcode scanning technology (introduced by IBM for Marsh Supermarkets)
Automated checkout kiosks (pioneered by Piggly Wiggly stores)
Point-of-sale credit card readers (developed by Diners Club for department stores)