Which pioneering retail chain is credited with introducing America's first true self-service grocery shopping model in 1916, revolutionizing retail economics?

The retail landscape has evolved dramatically over the past century, with innovations that fundamentally changed how consumers shop. One of the most significant retail revolutions occurred when the self-service grocery model was introduced, eliminating the need for clerks to gather products for customers. This innovation transformed the shopping experience and retail economics, setting the foundation for modern supermarkets and retail efficiency.

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Piggly Wiggly
A&P (Great Atlantic & Pacific Tea Company)
Kroger
Safeway