Files with qwk file extension might be found as old BBS archives. No longer actively used.
QWK file extension - BBS archive
What is qwk file? How to open qwk files?
File type specification:
The qwk file extension is mainly related to old bulletin board system (BBS) popular in late 90s.
The qwk file is a compressed archive that contains saved message with several control files. It was mainly used on FidoNet and similar services. Largely obsolete by now.
This qwk 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.