So here's my suspicion of what the trace regions on Ancestry mean: According to Ancestry, my primary regions are Great Britain, Ireland, and Scandinavia. On Gedmatch, the British and Irish populations in particular tend to have about 7+% Iberian DNA. Also on Gedmatch, my Iberian is shown to be between 11-12%. On Ancestry, it's given as 3%. My suspicion is that my 3% trace amount of Iberian on Ancestry means that I have about 3% Iberian above the average for the British Isles populations I could be totally wrong.
DISC is a behavior assessment tool based on the DISC theory of psychologist William Moulton Marston, which centers on four different behavioral traits: dominance, inducement, submission, and compliance. This theory was then developed into a behavioral assessment tool by industrial psychologist Walter Vernon Clarke.
Laser and optics. The most important part of an optical disc drive is an optical path, placed in a pickup head (PUH), usually consisting of a semiconductor laser, a lens for focusing the laser beam, and photodiodes for detecting the light reflected from the disc's surface.