Many traditional retailers are reshaping their backroom operations to meet the challenges and opportunities of omnichannel retailing where online orders can be fulfilled from multiple locations to meet the growing delivery demands of businesses and consumers. A backroom that was traditionally used to stock inventory for a store can now be repurposed as a de facto distribution center where a product can be picked, packed, and delivered to a customer who placed an online order. This new imperative could explain why the control of the backrooms at Wal-Mart's supercenters—which sell both groceries and dry goods—now falls under the oversight of its logistics operation. The Bentonville, Ark.-based retailing giant has said it believes its enormous bricks-and-mortar network gives it more delivery flexibility and depth of coverage than e-tailers like Amazon that lack physical stores. Wal-Mart has 4,835 stores in the U.S. It also operates 172 distribution centers, 5,954 tractors, and more than 59,000 trailers.