They're called computation orbs. They're used to facilitate magic... but the mechanics are all based on scientific engineering.

[ She removes a red, plainly designed orb from its place around her neck and holds it closer to her Omni. From close-up, it's possible to see through the orb's translucent casing and into its intricate interior. ]

If you've got the time now, I'll be happy to stop by in the next few minutes.