Fire extinguisher

A fire extingusher is a portable container of chemicals that can be discharged in a jet to put out a fire. There are three classes of fire exinguishers, A, B, and C.

Class A extinguishers are used for putting out fires of general combustibles such as wood or paper. These usually contain a foam-like mixture of water and carbon dioxide.
Class B extinguishers are intended for use on liquids or grease.
Class C extinguishers are used on electrical fires.