This document discusses different types of management information systems. It describes transaction processing systems that support routine operations and management. Management information systems provide structured decision support. Decision making involves intelligence gathering, design, choice, implementation, and monitoring. Structured problems can be addressed by management information systems using optimization, satisficing, or heuristic models. The document outlines various functional areas that management information systems support like finance, manufacturing, marketing, and human resources. It also describes decision support systems, group decision making systems, and executive information systems.