In graphics printing language, what do the initials CMYK and RGB stand for?

In graphics printing language, the initials "CMYK" stands for Cyan Magenta Yellow and Black which is mixed colors that are made for a document. It covers all the light, pigmented colors more easily compared to RGB, CMYK covers mostly black. RGB stands for red, blue, and green. RGB covers mostly white; it obtains different levels of color intensity from 0 to 100.