Art
The next room they visited was, once again, of little use to them. In fact, as much as Nero prided himself for his self study in high school, he could not even understand what the purpose of that room was.
He was able to gather, through a trend, that they were in some kind of warehouse or storage portion of the Vault, which is why each room simply stored specific items or items of a similar nature.
The items in this room seemed to be components of some other, larger machine that neither of them could make heads or tails of. The fact that everything was written in old Valen did not help either.
But they were able to gather that it was not relevant to them, so they moved on.
The fourth room they entered was a little special. It contained small plant samples. What was interesting was that each plant sample was alive.