Which retail innovation, first implemented in 1916, revolutionized shopping by allowing customers to select their own merchandise without clerk assistance?

Before the early 20th century, retail shopping looked very different. Store clerks would retrieve all products for customers from behind counters, and shoppers never directly accessed merchandise themselves. This poll tests your knowledge about a revolutionary retail innovation that fundamentally changed how we shop today and shaped modern retail operations and store layouts.

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Piggly Wiggly's self-service grocery store model
Woolworth's department store credit system
Sears Roebuck's mail-order catalog shopping
Marshall Field's introduction of price tags