American Society for Cybernetics - Aims are to facilitate the work of those with an interest in the field of cybernetics. International Association for Cybernetics - Aims are to ensure a permanent and organized connection between cybernetics researchers around the world to promote the development of this science and its technical applications. Cambridge Cybernetic Society - Association with the mission to create a forum for transdisciplinary discussion in the tradition of cybernetics, to consider relationships of technology, commerce and society in the 21st Century and to offer perspectives of cybernetics as a constructive discipline, especially in the context of its prefix being usurped. Cybernetics and Systems Societies - A list maintained by F. Heylighen. IFAC, the International Federation of Automatic Control - A multinational Federation of Organizations Representing the Engineering and Scientific Societies Concerned with Automatic Control. The Control Systems Group - Membership organization dedicated to application of William T. Powers' perceptual control theory model to understanding purposeful behavior. IEEE Systems, Man and Cybernetic Society - Fields of Interest are Integration of the Theories of Communication, Control, Cybernetics, Stochastics, Optimization and System Structure towards the Formulation of a General Theory of Systems, Technology and Application of the Above to the Analysis and Design of Biological, Ecological, Socio-Economic, Social Service, Computer Information, and Operational Man-Machine Systems.