The old industry code for Department Stores is SIC 5311.
Large department stores such as Wal-Mart Stores, Inc. (WMT) and Target Corporation (TGT) often compete across many industry codes, especially at Wal-Mart Supercenters and SuperTargets. The relevant NAICS codes to use might be:
452910 Warehouse Clubs and Superstores
452111 Department Stores (except Discount Department Stores)
445110 Supermarkets and Other Grocery (except Convenience) Stores