| .P21 | LKSoft | 3D-billedfiler | Express STEP Data Model File | JSDAI for Eclipse | LKSoft |
| .P3D | Markus Pfau | 3D-billedfiler | Peak3D 3D Graphics File | Peak3D | Markus Pfau |
| .P5D | Planner 5D | 3D-billedfiler | Planner 5D Project | Planner 5D | Planner 5D |
| .PAT | Autodesk, Inc. | 3D-billedfiler | AutoCAD Hatch Pattern File | Autodesk AutoCAD | Autodesk, Inc. |
| .PBF | Paragon Software Group | 3D-billedfiler | Paragon Backup File | Paragon Backup & Recovery | Paragon Software Group |
| .PBK | Microsoft Corporation | 3D-billedfiler | Dial-Up Phone Book File | Microsoft Windows | Microsoft Corporation |
| .PEB | Corel | 3D-billedfiler | Corel WordPerfect Program Editor Bottom Overflow File | Corel WordPerfect X8 | Corel |
| .PFP | Smoky City Design, LLC | 3D-billedfiler | Panorama Factory Project | The Panorama Factory | Smoky City Design, LLC |
| .PGS | Grasshopper LLC | 3D-billedfiler | PageStream Document | PageStream | Grasshopper LLC |
| .PHY | Autodesk, Inc. | 3D-billedfiler | 3ds Max Physique File | Autodesk 3ds Max | Autodesk, Inc. |
| .PL4 | Corel | 3D-billedfiler | Micrografx Designer Palette | Micrografx Designer 7 | Corel |
| .PLY | MakeMusic, Inc. | 3D-billedfiler | Finale Playback File | Finale | MakeMusic, Inc. |
| .PMD | Adobe Systems Incorporated | 3D-billedfiler | PageMaker Document | Adobe InDesign | Adobe Systems Incorporated |
| .PMJ | David Harris | 3D-billedfiler | Pegasus Mail Configuration File | Pegasus Mail | David Harris |
| .PMX | Yu Higuchi | 3D-billedfiler | MikuMikuDance Model File | MikuMikuDance | Yu Higuchi |
| .PNA | PhatNoise (Harman International) | 3D-billedfiler | PhatNoise Audio File | PhatNoise Music Manager | PhatNoise (Harman International) |
| .POS | Trimble Inc. | 3D-billedfiler | Trimble Position File | GPS Pathfinder Office Software | Trimble Inc. |
| .PP2 | Pingman Tools | 3D-billedfiler | PingPlotter Data File | PingPlotter | Pingman Tools |
| .PPL | Open Source | 3D-billedfiler | Free Pascal Dynamic Library | Free Pascal | Open Source |
| .PPZ | Smith Micro Software | 3D-billedfiler | Compressed Poser Prop File | Smith Micro Poser | Smith Micro Software |
| .PRC | Adobe Systems Incorporated | 3D-billedfiler | Product Representation Compact File | Adobe Acrobat DC | Adobe Systems Incorporated |
| .PRJPCB | Altium | 3D-billedfiler | Altium Designer Project File | Altium Designer | Altium |
| .PRM | Unknown Developer | 3D-billedfiler | Parameter File | GSAS | National Institute of Standards and Technology (NIST) |
| .PRO | Adobe Systems Incorporated | 3D-billedfiler | Adobe Proto Design File | Adobe Dreamweaver | Adobe Systems Incorporated |
| .PRV | E-on Software, Inc. | 3D-billedfiler | Vue Preview File | E-on Vue | E-on Software, Inc. |
| .PSA | Epic Games | 3D-billedfiler | Unreal Engine Skeletal Animation File | Unreal Tournament | Epic Games |
| .PSK | Epic Games | 3D-billedfiler | Unreal Engine Skeletal Mesh File | Epic Games Unreal Engine | Epic Games |
| .PVZ | PTC | 3D-billedfiler | ProductView Packaged Structure And Drawing | Creo View Lite (ProductView) | PTC |
| .PZ2 | Smith Micro Software | 3D-billedfiler | Poser Pose File | Smith Micro Poser | Smith Micro Software |
| .PZ3 | Smith Micro Software | 3D-billedfiler | Poser Scene File | Poser | Smith Micro Software |
| .PZZ | Smith Micro Software | 3D-billedfiler | Poser Compressed Scene File | Poser | Smith Micro Software |
af 1 
