The Great Atlantic & Pacific Tea Company, better known as A&P, was an American chain of grocery stores that operated from 1859 to 2015. From 1915 through 1975, A&P was the largest grocery retailer in the United States.

A chain store or retail chain is a retail outlet in which several locations share a brand, central management and standardized business practices. They have come to dominate the retail and dining markets and many service categories, in many parts of the world. A franchise retail establishment is one form of a chain store. In 2005, the world's largest retail chain, Walmart, became the world's largest corporation based on gross sales.