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

Before modern supermarkets and self-checkout systems transformed how we shop, one revolutionary retail innovation changed everything. Test your knowledge about a pivotal moment in retail history that fundamentally altered the shopping experience and set the foundation for today's retail operations. This innovation dramatically reduced costs, increased efficiency, and changed consumer behavior forever.

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Self-service shopping (customers selecting their own items)
Punch card inventory system
Cash register with receipt printing
Shopping baskets with wheels