[1][2] It involves the study of the behaviour, compartmentalisation, suppression and investigation of fire and its related emergencies, as well as the research and development, production, testing and application of mitigating systems.
However, it is considered a dangerous and very deadly complication to a fire, therefore using the incorrect extinguishing method can result in serious injury or death.
Class E, however generally refers to fires involving electricity, therefore a bracketed E, "(E)" denoted on various types of extinguishers.
[11][12] There is no standard definition for what this means quantifiably, though it always refers to the level response by the local authorities.
With the widespread installation of fire sprinklers in the past 50 years, the reliance on PFP as the only approach was reduced.