Files with oob file extension can be found as data files from Steel Panthers: World At War computer game.
OOB file extension - Steel Panthers World At War data
What is oob file? How to open oob files?
File type specification:
The oob file extension was reported to be used in old Steel Panthers: World At War computer strategy game for files that contain saved units statistics in a spreadsheet-like form.
Seems like specially formatted text file.
This oob 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.