Bunch of links: people wishing to recover MS Portable Word Ink
(Windows Mobile 6 and earlier) scribbles from relatives and past
selves
https://answers.microsoft.com/en-us/windows/forum/all/pwi-pocket-word-ink-writer-converter/53dbc24e-5fb8-490a-b05d-2221f7030a48
https://answers.microsoft.com/en-us/msoffice/forum/all/how-to-convert-old-pwi-files-from-pocketpc-etc/13d952c8-3136-4396-ad5a-9cc6b8fe8ca2
https://www.reddit.com/r/HowToOpenPWI/comments/tcj2ps/how_to_open_pocket_word_pwi_file/
https://askubuntu.com/questions/226344/how-do-i-convert-pocket-word-files-psw-to-odt
https://forum.openoffice.org/en/forum/viewtopic.php?t=64134
https://bugs.documentfoundation.org/show_bug.cgi?id=77278
https://www.mail-archive.com/libreoffice-bugs@lists.freedesktop.org/msg165173.html
https://ask.libreoffice.org/t/is-it-still-possible-to-install-and-use-the-pocket-word-psw-and-pocket-excel-pxl-filters-in-lo-4-3-2-2-how-can-i-install-them/10528