Clarence Saunders developed an American supermarket chain whose first outlet opened in what year?
Clarence Saunders (grocer): Clarence Saunders (August 9, 1881 – September 23, 1953) was an American grocer who first developed the modern retail sales model of self service. 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.
i don't know