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Potbelly Corporation, more commonly known as Potbelly Sandwich Shop or Potbelly Sandwich Works, is a publicly traded American fast-casual restaurant chain that focuses on submarine sandwiches and milkshakes. Potbelly was founded in 1977 in Chicago, and its name refers to the potbelly stove. Potbelly's menu features a variety of sandwiches that are all served hot, and the menu... Wikipedia