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This paper analyses briefly the nature and state in modelling and controlling Complex dynamic systems (CDS) and of Intelligent Systems (IS) been related to Decision Support Systems (DSS) theories, research and applica-tions. A brief historical review of DSS and how Artificial Intelligence (AI) has been embedded into the DSS and how this generated the interesting scientific area of Intelligent Decision Support Systems (IDSS). The challenge and absolute need for "Making Decisions" is briefly outlined. The challenge now is to make sense of DSS in ''Decision Making'' by planning it in understanding context and by searching new ways to utilize other ad-vanced methodologies to the challenging issues of CDS in the future. The possibility of using, Fuzzy Cognitive Maps (FCM) and Intelligent Systems (IS) in DSS is reviewed and analyzed. Some drawbacks and deficiencies of FCM are briefly presented and discussed. Open issues for future research of DSS and FCMs are outlined and briefly discussed.