A pbmb file extension is related to the Portable bitmap image format used to store monochrome bitmap images.
PBMB file extension - Portable bitmap image format
What is pbmb file? How to open pbmb files?
File type specification:
The pbmb file extension is related to the portable bitmap image format.
The pbmb file contains monochrome bitmap image stored in portable bitmap image format.
Seems to be obsolete.
MIME types:
image/x-portable-bitmap
This pbmb 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.