This tutorial is a new edition of a well-established annual tutorial started in 1997. It is intended for anyone using or planning to use plasma processing technology, including cold atmospheric plasma sources and applications. Extensive applications of plasma processing are accompanied by an intense development of different new plasma sources and methods (e.g., afterglow and downstream plasmas, pulsed plasmas, inductively coupled plasmas and helicons, dc and rf hollow cathode plasmas, atmospheric plasmas, etc.). The tutorial covers both the explanation of basic physical and technical principles of conventional and non-conventional systems and typical examples of their applications. This is very important not only for adopting new plasma technologies and easier orientation in a new market, but also for better understanding of conventional commercialized systems.