PDF (definition of terms)
PDF is an abbreviation for:
- parton distribution function (German Partonenverteilungsfunktion ), distribution function of the partons in hadrons
- PDF417 (Portable Data File) , 2D barcode, developed by Symbol Technologies in 1991
- Pop Directional Formatting , see bidirectional control character # character encoding
- Portable Document Format Portable Document Format (German: (transport) portable document format ), platform-independent file format for documents, developed and published in 1993 by Adobe Systems
- postdoctoral fellow , see postdoctoral fellow
- probability density function probability density function , tools for describing a continuous probability distribution
pd-f is an abbreviation for:
- pressedienst-fahrrad from pressedienst-fahrrad GmbH, supported by bike lobbies and bike manufacturers
