An fset file extension is related to the Fact200 software for Windows.
FSET file extension - Fact200 result data
What is fset file? How to open fset files?
File type specification:
The fset file extension is associated with the Fact200 a software for Microsoft Windows operating system used as Internet search client and a news feed reader.
The fset file stores results from Fact200.
This fset file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.