| Pinnacle Studio Cache Format | |
| Pinnacle Systems | |
| Ads |
COS2 file format is used by popular and actively developed video editing software Pinnacle Studio. COS2 document files are temporary files used by the software for storing data during editing.
COS2 files store references to various audio-video resources such as WMA or WMV files. COS2 documents are generated automatically by Pinnacle Studio. The editing tool is a paid software, and is available in many languages.
Windows
| .aawdef | Ad-Aware Definitions Format |
| .abr | Adobe Photoshop Brush Format |
| .ac$ | AutoCAD Undo Info Format |
| .acc | DR DOS - ViewMax Format |
| .acl | Microsoft Office Automatic Correction List |
| .acs | Microsoft Agent Character Structured Storage Format |
| .ad | After Dark Screen Saver Format |
| .add | Microsoft Dynamics AX Developer Documentation Format |