Society for Risk Analysis - Membership information, newsletter and journal, jobs and other resources. 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. European Working Group on Multicriteria Decision Aid - Presentation, newsletter archive and professional contacts. INFORMS Decision Analysis Society - Membership information, newsletter archive, meetings. Society for Judgment and Decision Making Home Page - An interdisciplinary academic organization dedicated to the study of normative, descriptive, and prescriptive theories of decision. 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. Military Operations Research Society - Serves the U.S. Department of Defense analytic community. Symposia, publications, awards, membership information. INFORMS Simulation Society - Society information, its newsletter, list of conferences and workshops, and simulation information and links. 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. ISDG: The International Society of Dynamic Games - Promotes interactions among researchers interested in the theory and applications of dynamic games. Newsletter, journals, meetings.