A collective term for persons with specialized training in various narrow fields of expertise whose occupations require training and skills in specific technical processes and procedures; and where further classification is deemed unnecessary by the user. Sources: Rhea, Ott, and Shafritz, The Facts On File Dictionary of Health Care Management, New York: Facts On File Publications, 1988; Dorland's Illustrated Medical Dictionary, 26th Edition. Philadelphia: W.B. Saunders Company, 1981; and Webster's II New Riverside University Dictionary. Boston: Riverside Publishing Company, 1984.