| Parton Distribution Function | Academic & Science |
| Payroll Discrepancy Form | Accounts and Finance |
| Prado | Airport Code |
| Pakistan Development Forum | Associations & Organizations |
| John Hancock Patriot Prime Development 1 | Business |
| Personal Democracy Forum | Community |
| Product Design Forums | Community |
| Piano Discussion Forum | Community |
| Protected Document Format | Community |
| Parkinson's Disease Foundation, Inc. | Community |
| Padget's Disease Foundation | Community |
| Peace Development Fund | Community |
| Parkinson's Disease Foundation | Community |
| probability distribution function | Computer and Networking |
| Printer Description File | Computing |
| Packet Description File | Computing |
| Plasma Display Fan | Computing |
| Power Distribution Frame | Computing |
| Page Description Format | Computing |
| Pop Directional Formatting | Computing |
| Performance Data File | Computing |
| Printer Definition File | Computing |
| Pre Defined Function | Computing |
| Print Data File | Computing |
| Personal Data File | Computing |
| Public Data File | Computing |
| Processing Document Format | Computing |
| Personal Document Format | Computing |
| Palm Document Format | Computing |
| Portable Display Format | Computing |
| Printable Document Format | Computing |
| Printer Driver File | Computing |
| Public Document Format | Computing |
| Portable Data File | Computing |
| Program Development Facility | Computing |
| Personally Dedicated Folder | Computing |
| Postdoctoral Fellowship | Educational Degree |
| Portable Document Format | File Type |
| Pcad Database Interchange Format | File Type |
| Ed-scan 24bit Format Graphics File | File Type |
| Package Definition File | File Type |
| Adobe Acrobat Portable Document Format | File Type |
| Netware Print Device Information | File Type |
| Protected (Portable) Document Format | General |
| Pretty Damned Farked | General |
| Personal Data Form | General |
| Portable Document File | General |
| Programs Dates and Fees | General |
| Power Density Function | General |
| Precision Direction Finding | General |
| Page Draft Form | General |
| Pair Distribution Function | General |
| Payload Delivery Format | General |
| Portable D**k Friend | General |
| Pretty Damn Fantastic | General |
| Printable Digital File | General |
| Professional Drivers Foundation | General |
| Pista Di Fiorano | General |
| Powerstroke Diesel Ford | General |
| Premium Diesel Fuel | General |
| Pigs Do Fly | General |
| Please Download F | General |
| Planetary Defence Force | General |
| Partnership Development Fund | Governmental |
| People's Democratic Front | Governmental |
| PADAMPUR | Indian Railway Station |
| Profilo Dinamico Funzionale | International |
| Pretty Damn (Darn) Funny | Internet |
| Probability Density Function | Maths |
| Peritoneal Dialysis Fluid | Medical |
| postdialysis fatigue | Medical |
| primary dysfunction | Medical |
| Panamanian Defense Force | Military and Defence |
| Program Data Form | Military and Defence |
| Prado, Buenos Aires, Brazil | Regional |
| Playa del Fuego | Regional |
| Pocket Dosimeter Fema | Space Science |
| Programmable Data Formatter | Space Science |
| Prado Airport | Transport & Travel |
