| File Extension: | OPF |
| File Type Description: | FlipViewer FlipBook File |
| File Type Developer: | E-Book Systems |
| Primary Associated Software: | FlipViewer |
| Primary Software Developer: | E-Book Systems |
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Geometer Plus LLC developed the FlipViewer FlipBook File file type when the Geometer Plus FBReader was initially released. Internal website statistics show that OPF files are most popular with users in United States and those running the Windows 10 operating system. A high percentage of these users browse the web using Google Chrome.
 | FlipAlbum by E-Book Systems |
 | FlipViewer by E-Book Systems |
 | Adobe InDesign by Adobe Systems Incorporated |
 | Geometer Plus FBReader by Geometer Plus LLC |
 | Adobe Digital Editions by Adobe Systems Incorporated |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Android |
 | Linux |
 | Blackberry |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .OPX | Insperity Business Services | Data Files | OrgPlus Organizational Chart |
| .ILV | IBM Cognos | Data Files | ILOG File |
| .V60PPF | ACD Systems | Data Files | ACDSee Pro File |
| .NT0 | Unknown Developer | Data Files | Adressmn File |
| .XXD | Brixx Software | Data Files | Brixx Planner Calendar |
| .VVF | Open Source | Data Files | Voc Vocabulary File |
| .118 | bhv | Data Files | Winfunktion Mathematik Julia Fractal File |
| .CEL | Affymetrix | Data Files | Affymetrix Probe Results File |
| .AH | The FreeBSD Community | Data Files | FreeBSD Installation Data |
| .PDB | Various Developers | Data Files | Program Database |
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*Files that are not supported can be opened in binary format.
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