Which organization developed a method of classifying fires based on appropriate extinguishing agents in the 1900s?

The method of classifying fires based on appropriate extinguishing agents was developed by Underwriters Laboratories (UL) in the 1900s. This classification system plays a crucial role in fire safety, as it helps first responders and individuals understand which types of extinguishing agents are effective for different classes of fires.

Underwriters Laboratories established standardized classifications that categorize fires primarily based on the materials involved. This approach allows for better preparedness and response strategies. For instance, it distinguishes between ordinary combustibles, flammable liquids, electrical fires, and others, guiding the choice of fire extinguishers and firefighting methods to use in different situations.

The other organizations listed have made significant contributions to fire safety and protection systems, but they did not specifically develop the classification of fires in relation to extinguishing agents. Thus, Underwriters Laboratories is recognized as the key organization responsible for this critical aspect of fire safety classification.