A Decision Support System (DSS) aids decision-making by providing useful information and models. It integrates data from various sources to support managers and analysts in evaluating alternatives and making informed choices. Typically used in business and management contexts, DSS helps identify problems, analyse data trends and predict outcomes. It often includes tools for data querying, analytical processing and visualisation, presenting results in easily understandable formats. By advancing interactive decision-making processes, DSS enhances efficiency and accuracy in strategic planning and operational decisions. Its adaptability allows customization to fit specific organisational needs, ensuring relevance and practicality in diverse decision-making scenarios. As technology advances, DSS continues to evolve, incorporating advanced analytics and artificial intelligence to further improve decision outcomes and adaptability in dynamic business environments. This book traces the progress of this field and highlights some of its key concepts and applications. Most of the topics introduced in this book cover new techniques and the applications of decision support systems. This book is a vital tool for all researching and studying this field.