| File Extension: | PFK |
| File Type Description: | XTree Programmable Function Keys |
| File Type Developer: | Jeffrey C. Johnson |
| Primary Associated Software: | XTree |
| Primary Software Developer: | Jeffrey C. Johnson |
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Jeffrey C. Johnson developed the PFK file extension, also know as a XTree Programmable Function Keys file, for the XTree software package. Our internal web tracking data indicates that Windows 10 operating system users, and those living in United States, are the most likely to use XTree Programmable Function Keys files. Google Chrome is their primary internet browser for the bulk of these users.
 | XTree by Jeffrey C. Johnson |
| Windows 10 | Windows 11 | Windows 6 | Windows 8.1 |
 | Windows |
 | DOS |
| Extension | File Type Developer | File Category | File Type Description |
|---|---|---|---|
| .CMB | Jeffrey C. Johnson | Settings Files | Xtree For Windows Button Bar |
| .XTP | adnx | Data Files | xTime Project Document |
| .X50 | Jeffrey C. Johnson | Data Files | XTreeGold Help Data |
| .XCL | Jeffrey C. Johnson | Developer Files | XTree For Windows Script |
| .ODC | Microsoft Corporation | Settings Files | Office Data Connection File |
| .DDR | Microcosm Ltd. | Settings Files | DDRemote Parameter Data |
| .XRX | Microsoft Corporation | Settings Files | Expression Encoder Media Profile Settings |
| .TP | SnapStream Media | Video Files | Beyond TV Transport Stream File |
| .ASP | Microsoft Corporation | Web Files | Active Server Page |
| .ASWCS | Avast Software | Settings Files | Avast! Compressed Skin File |
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