An xyw file extension is related to the XYWrite text editing software. An xyw file stores text document. Probably obsolete.
XYW file extension - XYWrite for Windows 3x/4.0 document
What is xyw file? How to open xyw files?
File type specification:
The xyw file extension is associated with the XYWrite program.
XYW file - a text document created by XYWrite for Windows 3.x/4.x
Most likely some old format without support. No further information could be found.
This xyw 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.