| filename extensions | art-335 |
| opf | |
| TechTarget file types | art-336 | OPF-Flip-Album-File |
| TechTarget file types | art-336 | OPF-FlipAlbum-File |
| TechTarget file types | art-336 | OPF-FlipViewer-FlipBook-File |
| TechTarget file types | art-336 | OPF-Gemstar-eBook-Publisher-Package-Gemstar-eBook |
| TechTarget file types | art-336 | OPF-KEPServerEX-Project-Configuration-File-Kepware-Technologies-Inc |
| TechTarget file types | art-336 | OPF-Obsidium-Project-File-Header |
| TechTarget file types | art-336 | OPF-Obsidium-Project-File-Obsidium-Software |
| TechTarget file types | art-336 | OPF-Open-eBook-File |
| TechTarget file types | art-336 | OPF-Visual-OMP-Project-File-DNA-Software-Inc |
| English | eng-000 | Flip Album File |
| English | eng-000 | FlipAlbum File |
| English | eng-000 | FlipViewer FlipBook File |
| English | eng-000 | Gemstar eBook Publisher Package |
| English | eng-000 | KEPServerEX Project Configuration File |
| English | eng-000 | Obsidium Project File |
| English | eng-000 | Obsidium Project File Header |
| English | eng-000 | Open Packaging Format File |
| English | eng-000 | Open eBook File |
| English | eng-000 | Visual OMP Project File |