PDF often refers to the Portable Document Format in computing.
PDF, pdf, Pdf, PdF or similar may also refer to:
- PDF (gene), a gene that in humans encodes the enzyme peptide deformylase, mitochondrial
- Probability density function, in probability and statistics
- Pigment dispersing factor, in biology
In computing and telecommunications
- Package Definition File, System Center Configuration Manager
- Page Description File, used in variable data publishing
- Pop Directional Formatting, Unicode character U+202C, a formatting character that cancels a previous bi-directional formatting character
- 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
- Parton distribution function
- Powder Diffraction File
Other uses
- Palladium fluoride (PdF), a series of chemical compounds
- Planar deformation features, in geology
- Peak draw force, in a compound bow in archery
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
- Peoples Defence Force (Grenada), the army of Grenada prior to the U.S.-led invasion of 1983
- Peoples Defence Force (Singapore), a civil reserve element of the Singapore Armed Forces
- Permanent Defence Forces, the standing branches of Ireland's military
Politics
- Parti de la France
- People's Democratic Front (Hyderabad), a political party that existed in India during the early 1950s
- Personal Democracy Forum, website and conference on technology in politics
Arts
- Playa del Fuego, a Delaware art festival
- Percival David Foundation of Chinese Art
See also
- KPDF-CD, a television station in Phoenix, Arizona
- PDF417, or "portable data file 417", a two-dimesional barcode