| File Extension: | SI3 |
| File Type Description: | ChessDB Index File |
| File Type Developer: | Interscape |
| Primary Associated Software: | ChessDB |
| Primary Software Developer: | Interscape |
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Interscape developed the ChessDB Index File file type when the ChessDB was initially released. Our data shows that SI3 files are frequently utilized by PC users in United States and popular on the Windows 10 platform. Most of these users are running the Google Chrome web browser.
 | ChessDB by Interscape |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Linux |
 | FreeBSD |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .FUP | Interscape | Data Files | FairUse Project File |
| .DLC | JDownloader Team | Encoded Files | Download Link Container File |
| .WBT | Nabi Studios | Game Files | Toribash Help File |
| .IPS | ZeroSoft Zophar | Game Files | Internal Patching System Patch File |
| .LPT | Interscape | Data Files | LogPlot Compiled Boring Log File |
| .QT | Apple | Video Files | Apple QuickTime Movie |
| .SERVER | Interscape | Data Files | Bonobo Activation API File |
| .BLB | SourceForge | Game Files | Interactive Fiction Package Game File |
| .RDB | EMC | Backup Files | Retrospect Backup Set |
| .L2R | NCSoft | Game Files | Lineage II Replay File |
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