This document provides specifications and illustrations for the positioning and orientation of parts with regards with coordinate systems and testing methodologies for additive manufacturing (AM) technologies in an effort to standardize the method of representation used by AM users, producers, researchers, educators, press/media, and others, particularly when reporting results from testing of parts made on AM systems. Specifications included cover coordinate systems and the location and orientation of parts. It is intended, where possible, to be compliant with the principles of ISO 841 and to clarify the specific adaptation of those principles for additive manufacturing.