Terminology and Descriptions 

Which terms are best to use? Rapid prototyping was the most popular term years ago when prototyping dominated the use of additive manufacturing (AM) technology. Prototyping remains an important application of AM technology, but it's only one of many. A growing number of people are using additive manufacturing when referring to the group of processes One reason is that it is the official ASTM standard term for all applications of the technology.

The mainstream press, bloggers, the investment community, major CAD companies, and many others use 3D printing most frequently, a term that will likely become the most popular in the future. Some argue that it is already the most popular term. 

Additive manufacturing and 3D printing are used for a range of applications including design and concept modeling, fit and function testing, patterns for casting, and mold and die tooling. They are also used for fixture and assembly tools, custom and replacement part manufacturing, short-run production, and series manufacturing.