Johnson & Johnson is engaged in the research and development, manufacture and sale of a broad range of products in the health care field. The business of Johnson & Johnson is conducted by more than 275 operating companies across the world. The Company’s primary focus has been on products related to human health and well-being. Johnson & Johnson's subsidiaries operate 144 manufacturing facilities occupying approximately 21.7 million square feet of floor space. The Company operates three business segments: Consumer, which offers a range of consumer products to general public; Pharmaceutical, which offers health related products through retailers, wholesalers and health care professionals for prescription use, and Medical Devices and Diagnostics, which offers a range of products to physicians, nurses, hospitals, and clinics.