Decoration (noun). specifically, any mark of honor to be worn upon the person, as a medal, cross, or ribbon of an order of knighthood, bestowed for services in war, great achievements in literature, art, etc. Origin: [LL. decoratio: cf.
A P-N junction (or N-P junction) is formed by creating two substrate materials of P type and N type on a semiconductor. P type means it is doped with free holes (electron depletion) and the N type is doped with electrons. Of course by physics, the free holes and free electrons would like to neutralize each other.
P/NP is a grading option in which letter grades are not assigned. Only the marks for Pass (equal to a grade of 'C' or better) or Not Pass (equal to 'C-' or below, no course or unit credit earned) are assigned. P/NP marks are not calculated into the student's GPA.