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

The history of retail has shaped how we shop today. From humble beginnings to technological innovations, retail history shows us how consumer experiences have evolved over centuries. Test your knowledge about a pivotal moment in retail history that fundamentally changed how people shopped and influenced store designs we still see today.

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Self-service grocery stores (Piggly Wiggly)
Department stores with multiple floors (Marshall Field's)
Mail-order catalogs (Montgomery Ward)
Shopping malls with multiple retailers (Country Club Plaza)