The American Industrial Hygiene Association, AIHA, “promotes, protects, and enhances industrial hygienists and other occupational health, safety, and environmental professionals in their efforts to improve the health and well being of workers, the community, and the environment.” The AIHA is a global organization that is not limited solely to industrial hygiene. Their web site is http://www.aiha.org/Content. Industrial hygiene deals with the protection of the health of those involved in industry. This classifies it as a form of preventative medicine.