Which retail innovation, introduced in 1916, first allowed customers to select their own merchandise without clerk assistance and is credited with creating modern shopping as we know it?

Before the 1910s, shopping looked completely different than it does today. Store clerks would gather items for customers from behind counters, packaging was minimal, and customers relied heavily on the expertise of salespeople. Then came an innovation that would fundamentally transform retail forever, giving birth to modern shopping as we know it. Test your knowledge about this pivotal moment in retail history that changed how we shop.

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Piggly Wiggly's self-service grocery store concept
Sears Roebuck's mail-order catalog system
Marshall Field's department store fitting rooms
Woolworth's fixed-price merchandise displays