Clarence Saunders developed an American supermarket chain whose first outlet opened in what year?
Clarence Saunders (grocer):  Clarence Saunders worked for most of his life trying to develop a truly automated store, developing Piggly Wiggly, Keedoozle, and Foodelectric store concepts. Piggly Wiggly: Piggly Wiggly is an American supermarket chain operating in the Southern and Midwestern regions of the United States, run by Piggly Wiggly, LLC, an affiliate of C&S Wholesale Grocers. Piggly Wiggly:  Its first outlet opened in 1916 in Memphis, Tennessee, and is notable for having been the first true self-service grocery store, and the originator of various familiar supermarket features such as checkout stands, individual item price marking and shopping carts.
i don't know