Which retail innovation, first introduced in 1916 by Clarence Saunders, allowed customers to select their own merchandise for the first time?

Test your knowledge about one of the most transformative but often overlooked inventions in retail history. Before this innovation, shopping was a completely different experience, requiring customers to rely on clerks to retrieve all products from behind counters. This breakthrough fundamentally changed how customers interact with merchandise and helped create the modern shopping experience we know today.

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Self-checkout kiosks
Piggly Wiggly's self-service grocery store format
The shopping cart (introduced by Sylvan Goldman)
Barcode scanners for inventory tracking