Which early 20th century retail innovation first introduced the concept of 'self-service shopping' that revolutionized consumer behavior and remains fundamental to most retail experiences today?

Throughout history, retail innovations have fundamentally changed how consumers interact with products and brands. From the first department stores to digital marketplaces, each era has introduced transformative retail concepts that reflected cultural shifts and technological advancements. This poll explores a pivotal moment in retail history that redefined consumer expectations and shopping behaviors, creating ripple effects that continue to influence modern retail strategy and brand experiences.

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Piggly Wiggly stores (1916)
Woolworth's five-and-dime stores (1879)
Sears mail-order catalog (1893)
Marshall Field's department store (1852)