Terminology and Descriptions 

Which terms are best to use? Rapid prototyping (RP) was the most popular term years ago when prototyping dominated the use of additive manufacturing (AM) technology. This is no longer the case. Prototyping remains an important application of AM technology, but it's only one of many. A growing number of people are using terms such as additive manufacturing when referring to the group of processes (e.g., fused deposition modeling, 3DP from Z Corp., laser sintering, etc.) that build parts layer by layer. The mainstream press uses 3D printing most frequently, a term that will likely become the most popular in the future. Among industry insiders, 3D printing currently refers to a group of AM systems that are relatively low cost, easy to use, and office friendly.

AM processes are used for a growing 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. Prototyping is only one of many applications and that's why RP is no longer suitable as a catch-all term. In fact, many companies resist the idea of using any method of prototyping for part manufacturing, so using this term could stifle its transition to manufacturing.