Executive information systems (EIS) provide executives with concise and relevant information tailored to their unique needs. Studies have found that executives receive information from various internal and external sources but value internally generated information higher. While most information comes in written form, executives prefer receiving information orally. An effective EIS centralizes important corporate data, allows executives to easily retrieve customized reports and analyses, and is supported by staff to assist executives with the system. Key factors for a successful EIS implementation include executive sponsorship, appropriate staff and technology, and linking the system to business objectives.