A scratchbin file extension is related to the Bravo and used for its data files.
SCRATCHBIN file extension - Bravo data
What is scratchbin file? How to open scratchbin files?
File type specification:
The scratchbin file extension is associated with the Bravo, a WYSIWYG document preparation system for Xerox Exec operating system included in Xerox Alto computers.
The scratchbin file stores some kind of data used by Bravo.
This scratchbin 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.