This text examines the use of collaboration technologies in the problem-solving or decision-making process. These systems are widely used in both education and in the workplace to enable virtual groups to discuss and exchange ideas on issues ranging from applied problems to theoretical debate. While some systems are text-based, the majority rely on visualization techniques to allow participants to represent their ideas in a more flexible, graphical form. The text evaluates existing systems, and looks at how the specific needs of users in both educational and corporate environments can be reflected in the design of new systems.