PDF (disambiguation)#In science
PDF often refers to the Portable Document Format in computing.
PDF, pdf, Pdf, PdF or similar may also refer to:
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Computing and telecommunications
- Pop Directional Formatting (Unicode character U+202C), a formatting character in bi-directional formatting
- Printer description file, describing capabilities of PostScript printers
- Profile-directed feedback, a compiler optimization better known as Profile-Guided Optimization (PGO)
- Program Development Facility, in the IBM z/OS operating system
- Pair distribution function
- Powder Diffraction File
- Probability density function
Mathematics
Organisations
- Parkinson's Disease Foundation, a medical foundation
- PDF Solutions, a company based in San Jose, California
- Peace Development Fund, a non-profit public foundation based in Amherst, Massachusetts
=Military=
- Panama Defense Forces
- People's Defence Force (Myanmar), armed wing of the Burmese government-in-exile since 2021
- People's Defence Force (Singapore)
- Permanent Defence Forces, the standing branches of Ireland's military
- Puntland Dervish Force, Armed force of Puntland
=Politics=
- Parti de la France
- People's Democratic Front (Hyderabad), a political party that existed in India during the early 1950s
- Progressive Democratic Front (Andhra Pradesh), a political party in the Indian state of Andhra Pradesh
- Party of Progress (Germany) (Partei des Fortschritts), a political party in Germany founded in 2020
- People's Democratic Front (Burma)
- People's Democratic Front (Indonesia)
- People's Democratic Front (Iran)
- People's Democratic Front (Meghalaya), India
- People's Democratic Front (Romania)
- Popular Democratic Front (Italy)
Other uses
- PDF (gene), a gene that in humans encodes the enzyme peptide deformylase
- Palladium fluoride (PdF), a series of chemical compounds
- Parton distribution function, in particle physics
- Peak draw force, in a compound bow in archery
- Percival David Foundation of Chinese Art
- Pigment dispersing factor, in biology
- Planar deformation features, in geology
- Playa del Fuego, a Delaware art festival
- Post-Doctoral Fellowship
- PDF file, a euphemism of pedophile