Retailing consists of the sale of goods or merchandise from a fixed location, such as a department store or kiosk, or by post, in small or individual lots for direct consumption by the purchaser. Retailing may include subordinated services, such as delivery. Purchasers may be individuals or businesses. In commerce, a retailer buys goods or products in large quantities from manufacturers or importers, either directly or through a wholesaler, and then sells smaller quantities to the end-user. Retail establishments are shops or stores. Retailers are at the end of the supply chain. Manufacturing marketers see the process of retailing as a necessary part of their overall distribution strategy. Shops may be on residential streets, shopping streets with few or no houses or in a shopping center or mall found in the central business district. Shopping streets may be for pedestrians only. Sometimes a shopping street has a partial or full roof to protect customers from precipitation. In the U.S., retailers often provided boardwalks in front of their stores to protect customers from the mud. Online retailing, also known as e-commerce is the latest form of non-shop retailing.