PROTO-Windows-Amaya-File
PROVXML-Microsoft-Windows-Mobile-settings-file
PROXY-Proxy-configuration-file
PRP-Data-conversion-saved-project-file-Oberon-Prospero
PRPRESET-Premiere-Preset-Adobe-Systems-Incorporated
PRPROJ-Adobe-Premiere-Pro-project-file
PR-Project-backup-file-Terramodel
PRPROJ-Premiere-Project-Header
PRPROJ-Premiere-Pro-Project
PRR-Office-Password-Recovery-Encoded-Text-File-AccentSoft
PRR-Perfect-Resume-Data
PRR-Perfect-Resume-The-Perfect-Resume-data-file
PRS1-Mac-File-Type
PRS2-Mac-File-Type
PRSL-Premiere-Style-Adobe-Systems-Incorporated
PRS-Presentation-file-Harvard-Graphics-for-Windows
PRS-Printer-resource-font-file-WordPerfect-for-Windows
PRS-Procedure-file-dBase-IV
PRST-Mac-File-Type
PR-Sun-icon-file
PRT1-Aldus-Persuasion-1-slide
PRT2-Mac-File-Type
PRT2-Unknown-Apple-II-File
PRT-A-print-formatted-file
PRTC-Mac-File-Type
PRTDOT-Solidworks-Part-Template-Dassault-Systemes
PR-Terramodel-Project-Backup
PRTL-Adobe-Premiere-title-file
PRT-Part-file-CADkey
PRT-Part-file-Pro-Engineer
PRT-Printer-driver-Dr-Halo
PRTPRP-SolidWorks-part-custom-properties-tab-template-file
PRT-Unigraphics-CAD-file
PRU2-Prorunner-2-0-Music-Header
PR-UNIX-Bitmap-Source
PRV-Internet-provider-template-file-psiMail
PRVKR-Pretty-Good-Privacy-PGP-Private-Keyring-PGP-Corporation
PRVKR-Pretty-Good-Privacy-private-keyring-file
PR-W32-Brontok-DP-worm-file
PRW-Artlantis-Shader-Preview-File
PRW-Art-lantis-Shader-s-Preview-ABVENT
PRW-Jigs-w-File-Tibo-Software
PRW-PR-Weaver-Saved-Data-File-PR-Weaver-Software
PRX-Compiled-program-Microsoft-FoxPro
PRX-Windows-multimedia-XML-file
PRZ-Graphics-file-Lotus-Freelance-97
PS16-Protracker-Studio-16-Format
PS1-PostScript-File
PS1-Windows-PowerShell-Cmdlet-File
PS1-Windows-PowerShell-Script-Microsoft-Corporation
TechTarget file types