| File Extension: | PRS |
| File Type Description: | Harvard Graphics Presentation |
| File Type Developer: | Software Publishing Corporation (SPC) |
| Primary Associated Software: | Corel Presentations X8 |
| Primary Software Developer: | Corel |
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Release of the Softmaker Office software program prompted the development of the Harvard Graphics Presentation file type by SoftMaker Software. Commonly, Harvard Graphics Presentation files are found on user computers from United States, and on PCs running the Windows 10 operating system. Google Chrome is the predominant internet browser used by this population.
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Android |
 | Linux |
 | Qtopia |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .PR4 | Software Publishing Corporation (SPC) | Data Files | Harvard Graphics Presentation |
| .zfsendtotarget | Microsoft Corporation | Compressed Files | Windows XP ZIP Compressed Folder |
| .WN | WN | Web Files | WN Web File |
| .DOX | Microsoft Corporation | Developer Files | Visual Basic Binary UserDocument |
| .HTN | Corel | Data Files | Micrografx Picture Publisher File |
| .TGT | Corel | Data Files | Corel Custom Data |
| .R50 | Eugene Roshal | Compressed Files | Split Multi-volume RAR Compressed File |
| .NFO | Microsoft Corporation | System Files | System Information File |
| .TZ | Smith Micro Software | Compressed Files | Compressed Tar Archive |
| .ZQO | Check Point Software Technologies Ltd. | Data Files | ZoneAlarm Mailsafe Renamed Data |
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