ACM Special Interest Group on Simulation (SIGSIM)
- Seeks the advancement of the state-of-the-art in the inherently cross-disciplinary fields of simulation and modeling. Includes mailing list.
- http://www.acm.org/sigs/sigsim/

International Society on Multiple Criteria Decision Making
- Develop, test, evaluate and apply methodologies for solving multiple criteria decision making problems.
- http://www.mit.jyu.fi/MCDM/

Mathematical Programming Society
- The Mathematical Programming Society is an international organization dedicated to the support and development of the applications, computational methods, and theory of mathematical programming in its widest sense.
- http://www.mathprog.org/

Society for Risk Analysis
- Menmbership information, newsletter and journal, jobs and other resources.
- http://www.sra.org/

Society for Medical Decision Making
- Promoting rational and systematic approaches to decision making that will improve the health and clinical care of individuals and assist health policy formation.
- http://www.gwu.edu/~smdm

Society for Judgment and Decision Making Home Page
- An interdisciplinary academic organization dedicated to the study of normative, descriptive, and prescriptive theories of decision.
- http://www.sjdm.org/

The National Security Decision Making Game
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- http://www.nsdmg.org/

Military Operations Research Society
- Serves the U.S. Department of Defense analytic community. Symposia, publications, awards, membership information.
- http://www.mors.org/

INFORMS Decision Analysis Society
- Membership information, newsletter archive, meetings.
- http://www.fuqua.duke.edu/faculty/daweb/

ISDG: The International Society of Dynamic Games
- Promotes interactions among researchers interested in the theory and applications of dynamic games. Newsletter, journals, meetings.
- http://www.hut.fi/Units/SAL/ISDG/

INFORMS College on Simulation
- A section of INFORMS. Contains college information, its newsletter, list of conferences & workshops, and simulation information and links.
- http://www.informs-cs.org/

European Working Group on Multicriteria Decision Aid
- Presentation, newsletter archive and professional contacts.
- http://www.inescc.pt/~ewgmcda