When planning to purchase an additive manufacturing system, buyers will find capabilities and a price range wider than products from most any industry. Systems can range from several hundred dollars for a hobbyist unit to nearly $1 million for some high-performance systems. It’s no wonder there is confusion with respect to the product segments. This paper addresses the capabilities, roles and positioning of systems geared for professional use. Beginning with the most basic information — the definition of 3D printers — this white paper positions the two product classes.