Copper (chemical symbol Cu) is an element that is used in almost every technology as a conductor and radiator for heat and electricity. It also has limited medicinal uses. Every civilization, no matter what stage of development they have achieved, uses copper in one way or another. It is used in the modern Systems Commonwealth civilization as a conductor and in the construction of nanobots, because copper is one of the few metals that is not harmful if ingested by a sentient being, so it is safe to use in disposable nanobots. Construction nanobots used by the Andromeda Ascendant and other Commonwealth ships are also made with copper, to aid them in radiating heat away from areas of the ship that are being repaired, and to also fuse and assimilate themselves into systems as part of repairs.
One major source of copper is the planet Birrin.