| File Extension: | 4TH |
| File Type Description: | Forth Language File |
| File Type Developer: | Open Source |
| Primary Associated Software: | Kate |
| Primary Software Developer: | KDE |
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KDE developed the Forth Language File file type when the Kate was initially released. Internal website statistics show that 4TH files are most popular with users in China and those running the Windows 10 operating system. Google Chrome is the predominant internet browser used by this population.
 | KDevelop by Open Source |
 | Gforth by GNU Project |
 | Kate by KDE |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | Mac |
 | Linux |
 | Solaris |
 | FreeBSD |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .PHP | Panic | Web Files | PHP Source Code File |
| .KWL | KDE | Data Files | KWalletManager File |
| .README | The Document Foundation | Text Files | Readme Text Document File |
| .MIME | Various Developers | Encoded Files | Multi-Purpose Internet Mail Extension |
| .ODT | Oracle Corporation | Text Files | OpenDocument Text Document |
| .LHS | SourceForge | Developer Files | Literate Haskell Script |
| .DTD | Syncro Soft | Developer Files | Document Type Definition File |
| .PLAN | KDE | Data Files | Calligra Plan Document |
| .CONFIG | Unknown Developer | Developer Files | Configuration File |
| .ODB | Various Developers | Database Files | OpenDocument Database |
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