PFD

PFD may refer to:

== Science, technology, and medicine == Personal flotation device Pelvic floor dysfunction Phase frequency detector in electronics Primary flight display, in an aircraft Probability of Failure on Demand, see Safety integrity level#Certification Process flow diagram, in process engineering Prepared for dyeing Professional Disc, recordable optical disc format PFD allowance in work systems Partial fraction decomposition Perfluorodecalin, a molecule capable of dissolving large amounts of gas Pediatric feeding disorder, a unifying diagnostic term encompassing medical, nutrition, feeding skill, and psychosocial domains