Which retail innovation, first introduced in 1916, fundamentally changed how customers interacted with products and is credited with creating the modern shopping experience?

The history of retail is filled with innovations that transformed how we shop. From ancient marketplaces to modern shopping malls, the evolution of retail spaces has been driven by a combination of cultural shifts, technological breakthroughs, and visionary entrepreneurs. This trivia question focuses on a pivotal moment in retail history that changed the shopping landscape forever and established patterns we still see in stores today.

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Piggly Wiggly's self-service grocery store model
Macy's introduction of the department store concept
Sears Roebuck's mail-order catalog system
F.W. Woolworth's five-and-dime store format