NAFEMS is the International Association for the Engineering Modelling, Analysis and Simulation Community. NAFEMS is a not-for-profit organisation which was established in 1983. Their principal aims are to:

• Improve the professional status of all persons engaged in the use of engineering simulation.
  
  
• Establish best practice in engineering simulation.
  
  
• Provide a focal point for the dissemination and exchange of information and knowledge relating to engineering simulation.
  
  
• Promote collaboration and communication.
  
  
• Act as an advocate for the deployment of simulation.
  
  
• Continuously improve the education and training in the use of simulation techniques.
  
  
• Be recognised as a valued independent authority that operates with neutrality and integrity.

NAFEMS focus on the practical application of numerical engineering simulation techniques such the Finite Element Method for Structural Analysis, Computational Fluid Dynamics, and Multibody Simulation. 

The information above was taken from NAFEMS website: https://www.nafems.org