Management Information System (MIS) is a planned system that collects, stores, and disseminates data to carry out management functions. It involves people, technology, and processes working together. There are two main types of MIS - transaction processing systems and decision support systems. The objectives of MIS are to collect, process, store, retrieve, and propagate information. Key characteristics include taking a systems approach, being management oriented, and having a long term perspective. An effective MIS requires qualified staff, computer experts, management support, a common database, and control/maintenance.