| Acronym | Definition |
|---|
| PDF | Portable Document Format (Adobe Acrobat) |
| PDF | Probability Density Function |
| PDF | Personal Democracy Forum |
| PDF | Post-Doctoral Fellowship |
| PDF | Probability Distribution Function |
| PDF | Parkinson's Disease Foundation |
| PDF | Personal Data Form |
| PDF | Portable Data Format (common but incorrect) |
| PDF | Portable Data File (common but incorrect) |
| PDF | Pair Distribution Function |
| PDF | Pooled Development Fund |
| PDF | Printer Description File (File Name Extension) |
| PDF | Powder Diffraction File |
| PDF | Package Definition File (Microsoft Systems Management Server) |
| PDF | Pretty Damn Funny |
| PDF | Polypeptide Deformylase |
| PDF | Pop Directional Formatting (unicode) |
| PDF | Policy Decision Function |
| PDF | Printer Definition File |
| PDF | People's Defence Forces |
| PDF | Playa del Fuego (art festival) |
| PDF | Program Development Facility |
| PDF | Panamanian Defense Force |
| PDF | Popular Defense Force |
| PDF | Pretty Darn Fast |
| PDF | Postscript Document Format (common but incorrect) |
| PDF | Permanent Defence Force (Irish Army) |
| PDF | Peoples' Democratic Front (Communist Party of India) |
| PDF | Program Data File |
| PDF | Power Delay Profile |
| PDF | Processor Defined Function |
| PDF | Pair Density Function |
| PDF | Point Detonating Fuze |
| PDF | Precision Direction Finding |
| PDF | Power Distribution Frame |
| PDF | Particle Distribution Function (physics) |
| PDF | Postal Distribution Facility |
| PDF | Programmable Data Format |
| PDF | Parton Distribution Function |
| PDF | Power Down Flag |
| PDF | Program Data Form |
| PDF | Planetary Defence Force (Warhammer 40,000) |
| PDF | People's Development Foundation (India) |
| PDF | Principal Direction of Fire |
| PDF | Precision Direction Finder |
| PDF | Path Diversity with Forward Error Correction |
| PDF | Personnel Deployment Function |
| PDF | I Profumi Di Firenze (Italian perfume) |
| PDF | Pearl Drummers Forum (website) |
| PDF | Planar Deformation Feature (geoscience) |
| PDF | Pretty Damn Funky |
| PDF | Premier Diesel Fuel (low sulfur diesel) |
| PDF | Primary Direction of Fire |
| PDF | Pulse Density Function |
| PDF | Pittsburgh Dialogue Foundation |
| PDF | Plant Design Factor |
| PDF | Payload Data Formatter |
| PDF | Publico Decreto Fecerunt (Latin: Made by Public Decree, epigraphy) |
| PDF | Paradox Data File |
| PDF | Procurement Data File |
| PDF | Product Development & Fulfillment company |
| PDF | Paranormal Dampening Field (remote viewing) |
| PDF | Pepito Domination Force |