Which innovative retail format, first introduced in the 1930s, revolutionized shopping by allowing customers to select their own items rather than having clerks gather products from behind counters?

Step back in time to explore how modern retail experiences evolved! Before online shopping and big box stores, retail innovation was happening in ways that shaped our current shopping habits. This trivia question explores a pivotal moment in retail history that fundamentally changed how consumers interacted with products and influenced shopping behaviors for generations to come.

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Self-service grocery stores (like Piggly Wiggly)
Department stores with centralized cash registers
Catalog showrooms with warehouse pickup
Membership-based wholesale clubs