Types of Information System Executive Support Systems (ESS)- address non-routine decision making through advanced graphics and communications Management Information Systems (MIS)- serve the functions of planning, controlling, and decision making by providing routine summary and exception reports. Decision-Support Systems (DSS) -combine data and sophisticated analytical models or data analysis tools to support nonroutine decision making. Knowledge Work Systems (KWS) - aid the creation and integration of new knowledge in the organisation. Office Systems - designed to increase the productivity of data workers in the office. Transaction Processing Systems (TPS) - perform and record the daily routine transactions necessary to conduct the business