Management Information System (MIS)
Support a broad spectrum of organizational tasks including decision analysis and decision making
Examples: profit margin by sales region, expenses vs. budgets
Decision Support System (DSS)
Aids decision makers in the making of decisions
Examples: financial planning with what-if analysis, budgeting with modeling
Expert System (ES)
Captures and uses the knowledge of an expert for solving a particular problem which leads to a conclusion or recommendation
Examples: MYCIN, XCON