Which of these retail innovations, first introduced in 1937, revolutionized grocery shopping by allowing customers to collect their own items rather than having clerks gather products for them?

In the long history of retail, certain product innovations have completely transformed how we shop. From simple tools to complex technologies, these breakthroughs have reshaped consumer behavior and revolutionized the retail landscape. This trivia question focuses on one of the most significant retail innovations that we now take for granted but which dramatically altered shopping patterns when first introduced. Test your knowledge of retail history and see if you can identify this game-changing invention!

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The shopping cart, invented by Sylvan Goldman for his Humpty Dumpty supermarket chain
The barcode scanner, developed by IBM for Marsh Supermarket
The self-checkout kiosk, created by David R. Humble after standing in a long grocery line
The pneumatic tube cash system, patented by William S. Lamson for department stores