PDF (disambiguation)
- Algospeak
- KPDF-CD
- PDF (gene)
- PDF Solutions
- PDF417
- Pair distribution function
- Palladium fluoride
- Panama Defense Forces
- Parkinson's Disease Foundation
- Parti de la France
- Parton distribution function
- Party of Progress (Germany)
- Peace Development Fund
- People's Defence Force (Myanmar)
- People's Defence Force (Singapore)
- People's Democratic Front (Burma)
- People's Democratic Front (Hyderabad)
- People's Democratic Front (Indonesia)
- People's Democratic Front (Iran)
- People's Democratic Front (Meghalaya)
- People's Democratic Front (Romania)
- Percival David Foundation of Chinese Art
- Permanent Defence Forces
- Pigment dispersing factor
- Planar deformation features
- Playa del Fuego
- Popular Defence Forces (Sudan)
- Popular Defense Forces (Gaza)
- Popular Democratic Front (Italy)
- Postdoctoral fellow
- Powder Diffraction File
- Printer description file
- Probability density function
- Probability distribution function (disambiguation)
- Profile-directed feedback
- Program Development Facility
- Progressive Democratic Front (Andhra Pradesh)
- Puntland Dervish Force