This is a high school (K12) level course on common standard digital components. It is based on the 4000 CMOS family. Even though this family is now out of date and susceptible to electrostatic discharge it is still in use, electrically robust and provision with datasheets is good. Educational objective is to acquire a general knowledge of standard digital components not the design of circuits in which these components are used. Therefore work with datasheets is focused. This course has been inspired by DOCTRONICS which is referenced now and then.