| File Extension: | OO3 |
| File Type Description: | OmniOutliner 3 File |
| File Type Developer: | The Omni Group |
| Primary Associated Software: | OmniOutliner |
| Primary Software Developer: | The Omni Group |
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Release of the OmniOutliner software program prompted the development of the OmniOutliner 3 File file type by The Omni Group. According to our internal data, OmniOutliner 3 File files are most popular with users in United States, with a majority of them running Windows 10. Most of these users are running the Google Chrome web browser.
 | OmniOutliner by The Omni Group |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Mac |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .ASPX | Microsoft Corporation | Web Files | Active Server Page Extended ASP.NET Script |
| .VSS | The Omni Group | Raster Image Files | Visio Stencil File |
| .VST | Microsoft Corporation | Raster Image Files | Targa Bitmap Image File |
| .RHTML | Yukihiro “Matz” Matsumoto | Web Files | Ruby HTML Web Page |
| .J | Oracle Corporation | Developer Files | Java Source File |
| .VTX | Richard Bannister | Audio Files | VTX Chiptune File |
| .VSX | Microsoft Corporation | Data Files | Visio Stencil XML File |
| .VSTX | Microsoft Corporation | Vector Image Files | Visio Drawing Template |
| .VSD | Microsoft Corporation | Vector Image Files | Microsoft Visio Drawing File |
| .GRAFFLE | The Omni Group | Vector Image Files | OmniGraffle Drawing |
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