An af0 file extension is related to the PocketBook, an e-book reader. An af0 file stores bookmark.
AF0 file extension - PocketBook bookmark data
What is af0 file? How to open af0 files?
File type specification:
The af0 file extension is associated with the hardware e-book reader PocketBook.
The af0 file contains saved bookmarks. File is in simple text format and can be manually edited, when the PocketBook is connected to PC.
This af0 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.