Primary Flight Display 
Personal Flotation Device 
Primary Flight Displays 
power flux density 
Personal Flotation Devices 
Phase/Frequency Discriminator 
Primary Flash Distillate 
Probability of Failure on Demand 
Process Flow Diagram 
Pacifica Fire Department 
Packet Filter Database 
Page Fire Department 
paired filtration dialysis 
Pala Fire Department 
Palatine Fire Department 
Palisade Fire Department 
Palmer Fire Department 
Palmyra Fire Department 
Palominas Fire District 
Pampa Fire Department 
pancreatic function diagnostant 
Pantego Fire Department 
Paradise Fire Department 
Paragould Fire Department 
Paris Fire Department 
Parker Fire Department 
Parkersburg Fire Department 
Parsons Fire Department 
Pasadena Fire Department 
Pascagoula Fire Department