Which retail innovation, first introduced in 1916 by Clarence Saunders, allowed customers to select their own merchandise without clerk assistance and revolutionized the shopping experience?

Before Amazon revolutionized online shopping and changed retail forever, one particular innovation transformed the in-store shopping experience in the early 20th century. This invention dramatically altered how consumers interacted with products and gave birth to the modern retail environment we know today. Test your knowledge about this pivotal retail discovery that fundamentally changed shopping behaviors worldwide.

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Self-checkout kiosks
The self-service grocery store (Piggly Wiggly)
Shopping carts
Barcode scanning systems