STEP-NC AP238 Technical Resources

This page provides technical articles for people who are contributing to the development of the STEP-NC standards. This information is to be used solely for purposes of standards development and review. Dave Loffredo is the AP238 editor and can be reached at General questions or comments can be directed to

AP-238 Specifications

These documents relate to work underway in the STEP-NC forum to prepare a second edition of AP238 with new capabilities. Documents from the development of the first edition, which was published in 2007, have been preserved here.

STEP-NC Training Materials