That segment of commercial enterprise devoted to the design, development, and manufacture of chemical products for use in the diagnosis and treatment of disease, disability, or other dysfunction, or to improve function.

Any enterprise centered on the processing, assembly, production, or marketing of a line of products, services, commodities, or merchandise, in a particular field often named after its principal product. Examples include the automobile, fishing, music, publishing, insurance, and textile industries.

The aggregate business enterprise of agriculture, manufacture, and distribution related to tobacco and tobacco-derived products.

The industry concerned with processing, preparing, preserving, distributing, and serving of foods and beverages.

Activity involved in transfer of goods from producer to consumer or in the exchange of services.

The effort of two or more parties to secure the business of a third party by offering, usually under fair or equitable rules of business practice, the most favorable terms.

Economic sector concerned with the provision, distribution, and consumption of health care services and related products.