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| Extension | File Type Developer | File Category | File Type Description | Software | Software Developer |
|---|---|---|---|---|---|
| .COS2 | Pinnacle Systems Inc. | Uncommon Files | Pinnacle Studio Cache File | Pinnacle Studio | Corel |
| .CPI | Sony | Video Files | AVCHD Video Clip Information | Pinnacle Studio | Corel |
| .DIF | Microsoft Corporation | Data Files | Data Interchange Format | Pinnacle Studio | Corel |
| .SCN | Microsoft Corporation | Game Files | Age Of Mythology Scenario File | Pinnacle Studio | Corel |
| .SDV | Pinnacle Systems Inc. | Video Files | Studio DV Project File | Pinnacle Studio | Corel |
| .ST4 | Corel Corporation | Video Files | Pinnacle Studio 400 Project File | Pinnacle Studio | Corel |
| .STU | Avid Technology | Data Files | Pinnacle Studio Project | Pinnacle Studio | Corel |
| .STX | Unknown Developer | Audio Files | Scream Tracker Music Interface Kit File | Pinnacle Studio | Corel |
| .TS | Various Developers | Video Files | Video Transport Stream File | Pinnacle Studio | Corel |
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