ABC extinguishers are versatile fire safety devices designed to combat three common types of fires: Class A (ordinary combustibles like wood and paper), Class B (flammable liquids such as gasoline and oil), and Class C (electrical fires). They contain a dry chemical agent, typically monoammonium phosphate, which effectively interrupts the chemical reaction of fire. These extinguishers are identified by their color-coded labels and are suitable for use in homes, offices, and vehicles. Regular maintenance and inspections are essential to ensure they function properly when needed. Proper training on how to use an ABC extinguisher can enhance safety during emergencies.