This chapter describes the main additive manufacturing technologies in use today. Note, however, that new technologies are continuously appearing on the market, so this space is in a continuous state of flux. Some of the technologies also have minor variants such as, for example, a material extrusion which might have one, two, or even more, extrusion nozzles. The intent of this chapter is not to cover every single technology in existence but, rather, to give the novice an overall understanding how each category of AM technology works.
