Computer technology enabling data from multiple operational processing systems to be brought together into a single source, which can then be accessed and interrogated. The data can be both current and historical. Warehousing differs from previous management information systems in that designers do not need to think about what questions might be asked of the system.
An Executive Information System (EIS) is a specialized decision support system tailored to assist senior executives in decision-making processes by providing easy access to both internal and external information relevant to the strategic goals of the organization.
