| File Extension: | TOPC |
| File Type Description: | TopicCrunch Project File |
| File Type Developer: | 3d-scape Limited |
| Primary Associated Software: | Microsoft Notepad |
| Primary Software Developer: | Microsoft Corporation |
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Release of the Notepad++ software program prompted the development of the TopicCrunch Project File file type by Don Ho. Website visitor analysis indicates that TOPC files are commonly found on Windows 10 user machines, and are most popular in Japan. Google Chrome is the predominant internet browser used by this population.
 | Notepad++ by Don Ho |
 | TextPad by Helios Software Solutions |
 | Gedit by GNOME |
 | TopicCrunch by 3d-scape Limited |
 | Sublime Text by Sublime HQ Pty Ltd |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Linux |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .VSPROPS | Microsoft Corporation | Settings Files | Microsoft Visual Studio Project Property Sheet File |
| .FMT | Microsoft Corporation | Settings Files | FoxPro Format File |
| .ION | Open Source | System Files | File Description File |
| .MN4 | Microsoft Corporation | Uncommon Files | Microsoft Money 95 Data File |
| .SEC | Symantec Corporation | Uncommon Files | Pretty Good Privacy Secret Key Ring |
| .DTC | Microsoft Corporation | Data Files | Windows Application Log File |
| .PSC1 | Microsoft Corporation | Settings Files | Windows PowerShell Console File |
| .RPY | Team Shanghai Alice | Game Files | Touhou Project Replay File |
| .MDO | Alcohol Soft | Disk Image Files | Alcohol 120% Split Image File |
| .LGP | Microsoft Corporation | Data Files | Microsoft Windows Application Log File |
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