This thesaurus, used and developed by the United Kingdom Department of Health, covers the core areas of health and social welfare and the subjects of health services, health administration and equipment, human biology, preventive and clinical medicine, drugs and the safety of medicines, medical supplies, pathology, nursing practice and administration, social services and social work. It also includes in less depth terms on subjects such as economics, management, political science, law, psychology, education, sociology, communication, technology, social security, construction and pollution.