This category lists businesses that primarily provide products or services for other businesses. However, many industrial sectors provide products and services for both other businesses and consumers, even though individual businesses might only service one particular group. In these cases such businesses are only listed here if there is no other more appropriate category within Business_and_Economy. Engineering and heavy industry is listed here unless the business is a manufacturer of consumer products, in which case it is listed in Manufacturing. Industrial supply businesses are normally listed here. Advertising, print and publishing businesses are listed here. Construction and maintenance businesses are listed here. Most other service sector businesses are listed elsewhere.