Which retail innovation, first widely implemented in 1916 by Piggly Wiggly founder Clarence Saunders, revolutionized shopping by allowing customers to select their own merchandise without clerk assistance?

The history of retail has seen numerous innovations that transformed how products reach consumers. One particular development in the early 20th century fundamentally changed shopping behavior and set the stage for modern retail as we know it today. Test your knowledge about this pivotal moment in product retail history that shifted power from store clerks to consumers and created a new shopping paradigm.

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Self-checkout kiosks
Self-service shopping (customers selecting their own items from shelves)
The shopping cart (invented by Sylvan Goldman)
Barcode scanning technology