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

Any investment that does not correlate with a broad based stock market index, such as the Dow Jones Industrial Average (DJIA), or overall market results is a zero-beta asset.

Zone rating in commercial auto insurance 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.