The document discusses the components and functions of a marketing information system. It describes a marketing information system as consisting of people, equipment, and procedures to gather, analyze, and distribute market information to aid in decision-making. The key components are an internal records system to track sales and customer data, a marketing intelligence system to gather external market insights, a marketing decision support system to analyze data, and a marketing research function to conduct systematic primary research. The document provides details on each of these components and how they work together to form a complete marketing information system.