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| P | Application parameter file (ReaGeniX code generator) |
| P | Picture file (APPLAUSE) |
| P | Source code (Pascal) |
| P10 | Plot 10 drawing (Tektronics) |
| P16 | 16 Channel Music file (ProTracker 16) |
| P22 | Patch file (Patch 22) |
| P2V | Backup file of a project in event planning software plan2viz |
| P3 | Project Planner file (Primavera) |
| P65 | Document file (PageMaker 6.0) |
| P7C | Digital ID file (MIME) |
| PA | Print Artist Project file |
| PA1 | Worktable (PageAhead) |
| PAB | Personal Address Book (Microsoft) |
| PAC | Image (Stad) |
| PAC | Package file (Sound Blaster Studio II) |
| PAD | Keypad definition (Telemate) |
| PAF | Personal Ancestry File (free genealogy software from the Mormon Church) |
| PAK | WAD file (Quake) |
| PAK | Compressed archive (PAK) |
| PAL | Color palette (Microsoft) |
| PAL | A compressed file (Generic) |
| PAN | Printer specific file (CorelDRAW) |
| PAQ | Password encrypted zip file (Hewlett-Packard) |
| PAR | Parameter file (Fractint) |
| PAR | Permanent output file (Microsoft Windows 3.x) |
| PAR | Parts application (Digitalk PARTS) |
| PART | eMule partial download |
| PART | Go!Zilla partial download |
| PART | eDonkey partial download |
| PAS | Source code file (Borland Pascal) |
| PAT | Pattern file (CorelDRAW) |
| PAT | Patch file (Advanced Gravis Ultrasound/Forte Technologies) |
| PAT | exePatch utility used for Warcraft2 (WarHack) |
| PAT | Hatch pattern file (DataCAD) |
| PB | Phone book (WinFax Pro) |
| PB | Setup file (PixBase) |
| PB | Fax (FAXability Plus) |
| PB1 | Document (First Publisher for Windows) |
| PBA | Source code file (Powerbasic BASIC) (Genus) |
| PBD | Dynamic library, an alternative to a native DLL (PowerBuilder) |
| PBD | Phone book (FaxNOW!-Faxit) |
| PBF | Turtle Beach Pinnacle Bank File |
| PBI | Profiler binary input file (Microsoft Source Profiler) |
| PBI | Include file (PowerBasic) (Genus) |
| PBK | Microsoft Phonebook |
| PBL | PowerBasic library (Genus) |
| PBL | Library file used in a development environment (PowerBuilder) |
| PBM | Planar bitmap graphic (XLib) |
| PBM | Portable bitmap graphic |
| PBN | Portable Bridge Notation file |
| PBO | Profiler binary output (Microsoft Source Profiler) |
| PBR | Resource file (PowerBuilder) |
| PBT | Profiler binary table (Microsoft Source Profiler) |
| PC | Text file (IBM) |
| PC3 | Custom palette (Harvard Graphics 3.0) |
| PC8 | Ascii text IBM8 character set (NewWave Write) |
| PCB | Application data file (Microsoft Powerpoint) |
| PCC | Cutout picture vector graphics (PC Paintbrush) |
| PCD | P-Code compiled test scripts as in Microsoft Test and Microsoft Visual Test |
| PCD | Image (Kodak Photo-CD) |
| PCE | Maps Eudora mailbox names to DOS filenames |
| PCF | Profiler command file (Microsoft Source Profiler) |
| PCH | Precompiled header file (Microsoft C/C++) |
| PCH | Patch file (Generic) |
| PCI | PCI Miniport file (Microsoft Windows System file) |
| PCJ | Multimedia authoring tool graphics (IBM Linkaway-Live) |
| PCK | Pickfile (Turbo Pascal) |
| PCL | Printer Control Language file (printer-ready bitmap) (Hewlett-Packard) |
| PCM | PCM file (OKI MSM6376 Sythesizer Chip) |
| PCM | Audio file |
| PCP | Live Update Pro file (Symantec) |
| PCR | PCMark Benchmark File |
| PCS | Picture storage file (Microsoft) |
| PCS | Animation (PICS) |
| PCT | PICT drawing (Macintosh) |
| PCW | Text file (PC Write) |
| PCX | PC Paintbrush bitmap (ZSoft) |
| PDA | Bitmap graphics |
| PDB | Physical model backup file (PowerDesigner) |
| PDB | Database file (3Com PalmPilot) |
| PDB | Brookhaven Protein Database file |
| PDB | Data file (TACT) |
| PDD | Graphic image that can be opened with Paint Shop Pro and Adobe PhotoDeluxe |
| PDF | Definition File |
| PDF | Printer Definition File (Netware) |
| PDF | Graphics file (ED-SCAN 24bit) |
| PDF | Portable Document file (Adobe Acrobat) (displayable with a Web browser) |
| PDL | Project description language file (Borland C/C++) |
| PDM | Physical model file (PowerDesigner) |
| PDM | Photo DVD Maker project file |
| PDP | Print Shop Deluxe file (Broderbund) |
| PDS | NASA Planetary Data System Format Space Mission Data |
| PDS | Photographic image file (origin not yet identified) |
| PDS | PLDASM Source Code |
| PDS | Print Shop Graphic |
| PDS | Hardware assembly source code file (Pldasm) |
| PDS | Broderbund Print Shop Deluxe |
| PDT | Database file (ProCite) |
| PDV | Printer driver (Paintbrush) |
| PDW | Document (Professional Draw) |
| PDX | Active Sensing PDXplorer IPC-2570 Product Data Exchange Information File |
| PDX | Adobe Acrobat Catalog Index |
| PDX | Database index file (ProCite) |
| PDX | Adobe Acrobat Catalog Index |
| PE3 | Image archive file (QuickViewer) |
| PE3 | Image archive file (Ulead PhotoImpact) |
| PE4 | Image archive file (Ulead PhotoImpact v.4.0) |
| PEB | Program Editor bottom overflow file (WordPerfect for Windows Library) |
| PED | Program Editor delete save file (WordPerfect for Windows) |
| PEM | Program Editor macro (WordPerfect for Windows library) |
| PEQ | Program Editor print queue file (WordPerfect for Windows) |
| PER | Program Editor resident area file (WordPerfect for Windows Library) |
| PES | Program Editor work space file (WordPerfect for Windows Library) |
| PET | Program Editor top overflow file (WordPerfect for Windows Library) |
| PF | Windows XP prefetch file (data read into RAM in anticipation of a user asking for it) |
| PF | Encrypted file (Alladin Systems) |
| PFA | Type 3 font (ASCII) |
| PFB | Type 1 font (binary) |
| PFC | Text file (First Choice) |
| PFC | Personal filing cabinet file (AOL) |
| PFC | PF Component file |
| PFD | SoftPro Real Estate Proform Document Format |
| PFF | Paraform file for 3D modeling (Scandata) |
| PFK | Programmable function keys (XTreePro) |
| PFM | Printer Font Metrics (Microsoft) |
| PFS | Database text file (PFS:Write) |
| PFT | Printer font (ChiWriter) |
| PG | Page cut/paste file (IBM LinkWay) |
| PGI | Printer graphics file device driver (PGRAPH Library) |
| PGL | Plotter drawing (Hewlett-Packard) |
| PGM | Program file (Signature) |
| PGM | Portable Graymap (bitmap) |
| PGN | Portable game notation file (ChessMaster and others) |
| PGP | PGP encrypted file |
| PGS | Manual page (man4dos) |
| PH | Optimized .goh file (Geoworks) |
| PH | Perl header file |
| PH | Phrase-table (Microsoft C/C++) |
| PH | Temporary file generated by Microsoft Help Compiler |
| PHN | Phone list (QmodemPro) |
| PHN | Phone list (UltraFax) |
| PHO | Phone database (Metz Phone for Windows) |
| PHP | HTML page that includes a PHP script |
| PHP3 | HTML page that includes a PHP script |
| PHR | Zoom MRS-802 Phrase Audio Data file |
| PHR | Phrases (LocoScript) |
| PHS | PHScript File |
| PHTML | perl-parsed HTML |
| PHTML | HTML page that includes a PHP script |
| PI1 | Low resolution picture file (Dages Elite) |
| PI2 | Medium resolution picture file (Dages Elite) |
| PI3 | High resolution picture file (Dages Elite) |
| PIC | Pixar picture file (SDSC Image Tool) |
| PIC | Picture file (Lotus) |
| PIC | PICT drawing (Macintosh) |
| PIC | 3D Image file (SoftImage) |
| PIC | Bitmap (PC Paint) |
| PICT | PICT image file (Macintosh) |
| PIF | PIF drawing (IBM) |
| PIF | Vector graphics GDF file (IBM Mainframe) |
| PIF | Compressed archive (Macintosh) |
| PIF | Program Information File |
| PIG | WAD file (Lucas Arts Dark Forces |
| PIN | Data file (Epic Pinball) |
| PIN | Data file (Epic Pinball) |
| PIV | Pivot stick figure animation file. |
| PIV | Pivotal Sales Suite activity file used to email activity and launch associated application. |
| PIX | Alias image file (SDSC Image Tool) |
| PIX | Bitmap (Inset Systems) |
| PJ | Source Integrity file (MKS) |
| PJ | Project file (CA-SuperProject) |
| PJT | Visual Foxpro Project (Microsoft) |
| PJT | Visual FoxPro memo file (Microsoft) |
| PJX | Visual FoxPro project file (Microsoft) |
| PK | Packed bitmap font file (TeX DVI) |
| PKA | Compressed file archive (PKARC) |
| PKG | Installer script (NEXT) |
| PKG | Developer Studio application extension (similar to a DLL file) (Microsoft) |
| PKR | Public Keyring (PGP) |
| PKT | Packet file (Fidonet) |
| PL | Source code file (Perl) |
| PL | Source code file (Prolog) |
| PL | Property list font metric file (TeX) |
| PL | Palette (Harvard Graphics) |
| PL | Interleaf printerleaf (or WorldView) format |
| PL1 | Room plan (3D Home Architect) |
| PL3 | Chart palette (Harvard Graphics 3.0) |
| PLB | Library file (Microsoft FoxPro) |
| PLC | Add-in file (Lotus 1-2-3) |
| PLG | A format use by REND386/AVRIL |
| PLI | Data description file (Oracle 7) |
| PLL | Pre-linked library file (Clipper 5) |
| PLM | Module (DisorderTracker2) |
| PLN | Spreadsheet (WordPerfect for Windows) |
| PLR | Pilot file (Descent 1-3) |
| PLS | MPEG PLayList file (used by WinAmp) |
| PLS | MYOB Plus file |
| PLS | Sample file (DisorderTracker2) |
| PLT | Plot drawing (AutoCAD) |
| PLT | Palette (Generic) |
| PLT | Pre-linked transfer file (Clipper 5) |
| PLT | Sign-making software (Gerber Optical) |
| PLT | Drawing (HPGL Plotter) |
| PLY | Presentation screen (Harvard Spotlight) |
| PLY | Data file (PopMail) |
| PM | Module (Perl) |
| PM | Bitmap graphics (Presentation Manager) |
| PM3 | Document (PageMaker 3.0) |
| PM4 | Document (PageMaker 4.0) |
| PM5 | Document (PageMaker 5.0) |
| PM6 | Document (PageMaker 6.0) |
| PMC | Graphics (A4TECH Scanner) |
| PMD | Adobe PageMaker 7.x file |
| PMM | Program file (Amaris BTX/2) |
| PN3 | Printer device driver (Harvard Graphics 3.0) |
| PNG | Browser catalogue (Paint Shop Pro) |
| PNG | Bitmap file (MacroMedia FireWorks) |
| PNG | PrintMaster graphics file |
| PNG | Bitmap (Portable Network Graphics) |
| PNM | Portable aNY Map graphics (PBM) |
| PNT | QWK reader pointer file (MarkMail 2.x) |
| PNT | Pen Table plotting file (Pro/Engineer) |
| PNT | Graphic file (MacPaint) |
| PNTG | Same as PNT file |
| POG | PIG file extension (Descent2) |
| POH | Optimized .goh file (Geoworks) |
| POL | 3D polygonal modeling file (Innovmetric) |
| POL | Windows NT Policy file |
| POP | Message index (PopMail) |
| POP | Popup file (Visual dBase) |
| POT | PowerPoint template (Microsoft) |
| POV | Persistence of Vision file (Ray-Tracer) |
| POW | Chord chart (PowerChords) |
| PP | Compressed Amiga archive (POWERPACKER) |
| PP4 | Bitmap (Picture Publisher 4) |
| PPA | PowerPoint Add-in (Microsoft) |
| PPB | Button bar for print preview (WordPerfect for Windows) |
| PPD | PostScript Printer definition file specification (Adobe Acrobat v.4.0) |
| PPF | Pinnacle Program File (Turtle Beach) |
| PPI | Graphics file (Microsoft PowerPoint) |
| PPL | PolaroidPalettePlus ColorKey device driver (Harvard Graphics 3.0) |
| PPM | Portable Pixelmap bitmap |
| PPO | Pre-processed output file (Clipper 5) |
| PPP | Desktop publishing default output file (Serif PagePlus) |
| PPP | Document or finished project (Parson Power Publisher) |
| PPS | ArcView Processing Set Codes |
| PPS | Personal Producer Storyboard |
| PPS | PowerPoint Slideshow |
| PPS | PowerPoint slide show (Microsoft) |
| PPT | PowerPoint presentation (Microsoft) |
| PPX | Cognos Powerplay portable report (xml format) |
| PQB | Master boot backup file (PowerQuest BootMagic) |
| PQI | Drive image file (PowerQuest) |
| PR2 | Printer driver (dBase IV) |
| PR2 | Presentation (Aldus Persuasion 2.x) |
| PR3 | Presentation (Aldus Persuasion 3.x) |
| PR3 | Postscript printer driver (dBase IV) |
| PRC | Resource (text or program) file (3com PalmPilot) |
| PRD | Printer driver (Generic) |
| PRE | Settings (Programmer's WorkBench) |
| PRE | Settings (Microsoft C/C++) |
| PRE | Presentation (Lotus Freelance) |
| PREL | Adobe Premiere Elements Project |
| PRF | Settings file (Macromedia Director) |
| PRF | Pixel Run Format graphics (Improces-Fastgraph) |
| PRF | Printer driver (dBase IV) |
| PRF | Output file (Profiler) |
| PRF | System file (Microsoft Windows) |
| PRG | Program source files (Atari) |
| PRG | Program file (WAVmaker) |
| PRG | Program source files (dBase IV, Clipper 5, and Microsoft FoxPro) |
| PRI | Printer definitions (LocoScript) |
| PRJ | Project file (3D Studio) (DOS) |
| PRM | Parameter file (Generic) |
| PRM | MYOB Premier file |
| PRN | Windows Printer file (DataCAD) |
| PRN | Printer driver (Signature) |
| PRN | Text file (Lotus 1-2-3-Symphony) |
| PRN | Print Table (space delimited text) |
| PRND | PageMaker 7.0 file |
| PRO | Configuration file (Pro/Engineer) |
| PRO | Graphics profile file (DOS) |
| PRO | Project file (Terramodel) |
| PRO | Source code file (Prolog) |
| PRP | Data conversion saved project file (Oberon Prospero) |
| PRS | Printer resource font file (WordPerfect for Windows) |
| PRS | Procedure file (dBase IV) |
| PRS | Presentation file (Harvard Graphics for Windows) |
| PRT | Printer driver (Dr. Halo) |
| PRT | Part file (Pro/Engineer) |
| PRT | Part file (CADkey) |
| PRT | Unigraphics CAD file |
| PRT | A print-formatted file |
| PRV | Internet provider template file (psiMail) |
| PRX | Compiled program (Microsoft FoxPro) |
| PRZ | Graphics file (Lotus Freelance 97) |
| PS | Postscript-formatted file (a Postscript printer-ready file) |
| PSA | Adobe Photoshop Elements Album |
| PSB | Sound Bank file (Pinnacle) |
| PSD | Bitmap (Adobe Photoshop) |
| PSE | Bitmap graphics (IBM printer Page SEgment) |
| PSF | Outline PostScript printer font (ChiWriter) |
| PSI | A-law audio file (psion) |
| PSM | Sound data file (Epic Pinball) |
| PSM | Symbol table of IDE (Turbo Pascal) |
| PSM | Studio module (ProTracker) |
| PSP | Procedure (Prodea Synergy) |
| PSP | Image file (PaintShop Pro) |
| PSR | Report file (PowerSoft) |
| PST | Personal Folder File (Microsoft Outlook) |
| PT3 | Template (PageMaker 3.0) |
| PT3 | Device driver (Harvard Graphics 3.0) |
| PT4 | Template (PageMaker 4.0) |
| PTB | Script file (PubTech BatchWorks) |
| PTB | Table file (Pro/Engineer) |
| PTB | Peachtree backup file |
| PTD | Table file (Pro/ENGINEER) |
| PTD | LiveNote Portable Transcript document |
| PTF | ProTracker Tennis Match file |
| PTF | LiveNote Portable Transcript file |
| PTL | Petal file (ASCII version of Microsoft Visual Modeler) |
| PTM | Music module (MOD) (Polytracker) |
| PTM | Macro (PubTech BatchWorks) |
| PTN | PaperPort (ScanSoft) thumbnail image index file |
| PTR | QWK reader pointer file (QMail) |
| PTX | RealLegal Portable E-Transcript viewer file |
| PUB | Document (Microsoft Publisher) |
| PUB | Public key ring file (PGP) |
| PUB | Publication (Ventura Publisher) |
| PUD | Map file (WarCraftII) |
| PUT | Compressed archive (PUT) |
| PVD | Script file (Instalit) |
| PVL | Library file (Instalit) |
| PVT | Local pointlist (Fidonet) |
| PW | Text file (Professional Write) |
| PWD | Word document (Microsoft Pocket) |
| PWL | Password list file (Microsoft Windows 9.x) |
| PWP | Text document (Professional WritePlus) |
| PWP | Image file (a roll of film viewed using Photoworks) |
| PWZ | PowerPoint wizard (Microsoft) |
| PX | Primary database index (Paradox) |
| PXL | Pocket Excel spreadsheet (Microsoft) |
| PXW | Pixtran file |
| PY | python Script file |
| PY | Saved emessages (YAHOO) |
| PYC | python Compiled script file |
| PZD | Default settings (Pizazz Plus) |
| PZO | Overlay file (Pizazz Plus) |
| PZP | Palette (Pizazz Plus) |
| PZS | Settings (Pizazz Plus) |
| PZT | Transfer file (Pizazz Plus) |
| PZX | Swap file (Pizazz Plus) |
