Credits

Credits represent a player character's collective cumulative wealth; it does not necessarily have to come just from units that follow the GIS (Galactic Imperial Standard), but can also represent rare materials, objects, or favors they can call in.
 * 1) "Credits? Now there's a misused terminology: can you imagine people trying to say, 'Excuse me sir, but may I have some credit on my credits? Oh, and if you can, you you put some credits in my debit bank?'. But, ah, the name caught on, and now good bankers such as I have to suffer our brain aneurysms in silence..." -Gorfax, Point Banker

Uses for Credits
Credits are used for purchasing; this can be as mundane as common objects, such as weapons, armors, and helpful tools, but they can also be used to bride people or purchase other services, such as medical facilities or housing accommodations.

Gaining Credits
Credits can be gained by doing missions that have a reward of payment for them. Other than that, credits can be gained by selling gear, doing jobs, looting bodies, or simply finding spare change lying around.