Files with pw suffix can be occasionally encountered as old documents from Pathetic Writer and Professional Write.
There is one other file type using
the PW file extension!
.pw - Pointwise database
PW file extension - Document file
What is pw file? How to open pw files?
File type specification:
File extension pw has been in the past also used for documents saved in several programs, including Pathetic Writer and Professional Write. Most likely a plain TXT or RTF format.