A pen file extension is related to the io2 software from Logitech.
There is one other file type using
the PEN file extension!
.pen - Corel PaintShop Pro enamel presets
PEN file extension - Logitech io2 drawing
What is pen file? How to open pen files?
File type specification:
The pen file extension is associated with the io, a personal digital pen developed by Logitech company.
The pen file stores drawing created by io open and captured by io2 software.
This pen 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.