Uranium is great for bombs and making your hair fall out. Your Cranium is great for storing your squishy-thinky-bits in. Obtainium is great for finding parts for your next project you never knew you needed.
In Freeside parlance Obtainium is where good parts for the greater good are donated. Various Obtainium locations throughout the facility are where you can leave extra motors, hardware, lumber, modules, components, and cables for any other member to take and use as they wish. It's a give and take relationship, and if you use Obtainum you should contribute to it.
We sometimes clear away, toss, and sort obtainum during buildouts, or whenever someone gets a wild hair to do so, and obtainium is a great place to put parts you know are too good to toss, but don't have a personal need for. If they sit around a long while any