The document discusses different types of information systems used in businesses before the 1970s and their purposes. It describes management information systems (MIS) which provide managers with regular information about daily business activities to help them run processes more efficiently compared to manual systems. It also outlines transaction processing systems (TPS) which keep records of daily transactions in a database, decision support systems (DSS) which help managers analyze information and make decisions through reports and diagrams, executive information systems (EIS) which help top-level management plan strategies and forecast trends, and expert systems (ES) which store knowledge to make logical suggestions for users such as doctors.