Files with ovb file extension might be found as older vocabulary backup files from OnkoS program. Probably no longer available.
OVB file extension - OnkoS vocabulary backup
What is ovb file? How to open ovb files?
File type specification:
The ovb file extension is mainly related to old German program called OnkoS and used for one of its default file type.
The ovb file contains vocabulary backup. Seems like both the program and the file type are no longer used.
This ovb 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.