The healthcare industry includes various sectors engaged in the provision of health services and products. According to industry ratings and the market, such as the Global Industry Classification Standard and Industrial Classification reference, the health care industry including health equipment and services as well as pharmaceuticals, biotechnology and science life. Specific areas linked to these groups are: biotechnology, diagnostic substances, drug supply, drug manufacturers, hospitals, medical device and equipment, diagnostic laboratories, nursing homes, providers of health care plans and home health care. According to industry ratings of the government, based primarily on the United Nations, the International Standard Industrial Classification, health care in general, is in inpatient services, the activities of medical practice and dental, and other human health activities. The last class consists of all activities for human health not performed in hospitals, doctors or dentists. These are activities of, or under the supervision of nurses, midwives, physiotherapists, laboratiories scientific or diagnostic pathology clinics, home, or other medical professionals to in the field of optometry, hydrotherapy, medical massage, yoga therapy, music therapy occupational therapy, speech therapy, chiropody, homeopathy, chiropractic, acupuncture, etc.