I think these are temporary libraries created during package build. They normally get deleted but sometimes if the package build fails, they do not get deleted properly. It is okay to delete them. I was a client that had about 50 of those libraries on his AS/400, wasting disk space.
They are from partal Package builds. I have seen them at most clients sites. You should be able to just delete them with no issues. I have always deleted them in the past.
Back in the OneWorld B732.1 release that I work on, these are the temporary libraries that OneWorld creates when you are build an update or partial package. You can delete them and not have any issues. However if you feel more comfortable - save them off to tape and then delete them (just to be on the safe side).
I have a bunch of BD3* objects as well but in libraries other than what you
listed and I have the specific objects you've listed below. These are
*MODULE object Types with CLE attributes. These can be deleted????