Which groundbreaking store design innovation, first implemented in 1916, fundamentally changed retail by allowing customers to select their own merchandise without clerk assistance?

Product design in retail has evolved dramatically over the decades, with certain innovations revolutionizing how consumers interact with stores. From self-service concepts to digital integration, these design breakthroughs have shaped modern shopping experiences. Test your knowledge of the pivotal moments in retail design history that transformed the industry and influenced consumer behavior patterns worldwide.

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Piggly Wiggly's self-service grocery concept
Macy's department store escalators
Woolworth's checkout counter system
Marshall Field's glass display cases