The Occupational Safety and Health Act (OSHA) z-list is a table of toxic and hazardous air contaminants.

Financial risk is heightened when all investments in a portfolio are subject to the same risk factors.

Zone rating in commercial auto divides the country into 50 zones with different rating tables applicable for each zone.

The zone system is a triennial insurance company solvency examination system developed by the National Association of Insurance Commissioners.