The abbreviation "NIOSH" means the National Institute for Occupational Safety and health. The institute is a research organization affiliated with the Center for Disease Control and Prevention (CDC) in the United States, established to research and develop standards and guidelines for the safety and health of workers in work environments. NIOSH's main tasks include:
Research and collect data on occupational hazards
provide training and resources to reduce occupational injuries and diseases
develop and promote safety and health standards

The Institute also works with other organizations and institutions to improve working conditions and prevent accidents and diseases in workplaces.