PFD
- Alaska Permanent Fund
- PDF (disambiguation)
- PFD allowance
- Partial fraction decomposition
- Pelvic floor dysfunction
- Perfluorodecalin
- Personal flotation device
- Phase frequency detector
- Philadelphia Fire Department
- Pigespejdernes Fællesråd Danmark
- Prepared for dyeing
- Primary flight display
- Process flow diagram
- Professional Disc
- Safety integrity level