5 What types of systems are used for enterprise-wide knowledge management and knowledge word, and how do they provide value for businesses? Enterprise content management systems feature databases and tools for organizing and storing structured documents and semistructured knowledge, such as e-mail or rich media. Knowledge network systems provide directories and tools for locating firm employees with special expertise who are important sources of tacit knowledge. Often these systems include group collaboration tools, portals to simplify information access, search tools, and tools for classifying information bases on a taxonomy that is appropriate for the organization. Learning management systems provide tools for the management, delivery, tracking, and assessment of various types of employee learning and training.