Association for Manufacturing Technology
An organization "committed to the expansion of our community, the promotion of transformative technology, the improvement of supply chain access, the facilitation of a global marketplace for increased business opportunity and growth, and the enhancement of industry knowledge for competitiveness and sustainability."
Largest manufacturing community on the web. Includes free instructional videos.
National Tooling & Machining Association (NTMA)
NTMA strives to " improve the capabilities of all members through the accelerated adoption of tools, technologies, and best practices. Speaking and acting with one voice, we advocate for our industry and provide learning resources for our members."
International Association of Machinists
Labor Union for machinists.