National Fire Protection Association Standard four-color warning signs with varying numeric codes for flammability, health, and reactivity hazard and alphanumeric and graphic codes for specific hazards |
Department of Transportation Warning placards with numeric and color codes and graphics for almost every traditional hazardous material found on U.S. highways |
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Hazmat Warning DOT Extensions Warning placards with numeric and color codes and graphics for new classifications of hazardous materials found in American bodies and minds |
Hazmat Warning NFPA Extensions Four-color warning signs that extend the numeric codes for flammability, health, and reactivity hazard and add new alphanumeric and graphic codes for new specific hazards |
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National Cultural Protection Four-color warning signs with varying numeric codes for pretension, stupidity, and exploitation hazard and alphanumeric and graphic codes for specific hazards |
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