Which retailer pioneered the modern self-service grocery store format in 1916, replacing the traditional clerk-service model where shop employees gathered items for customers?

Throughout history, certain retail innovations have fundamentally changed how people shop. From the introduction of department stores in the 19th century to e-commerce in the modern era, retail formats have evolved dramatically. This poll tests your knowledge about a pivotal moment in retail history that transformed the shopping experience for millions worldwide and established a new business model that countless retailers would later adopt.

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Piggly Wiggly
A&P (Great Atlantic & Pacific Tea Company)
Safeway
Kroger