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

Throughout history, certain retail innovations have fundamentally transformed how people shop. From ancient marketplaces to modern digital platforms, retail evolution has mirrored broader historical and technological developments. This trivia challenges your knowledge about a pivotal retail innovation that revolutionized consumer behavior and set the foundation for modern shopping experiences. Test your understanding of how historical retail advancements shaped our current commercial landscape!

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Piggly Wiggly's self-service grocery store model
Marshall Field's department store 'bargain basement'
Sears Roebuck's mail-order catalog system
F.W. Woolworth's fixed-price 'five and dime' stores