The document discusses different types of information systems:
- Expert systems focus on knowledge from experts to provide answers to questions.
- Decision support systems use a number of analytical models and tools to interactively simulate answers to questions for senior managers.
- Executive information systems provide graphical and interactive projections to answer questions for senior managers.
- Management information systems provide structured information through reports and analysis for staff experts or managers.
- Transaction processing systems sort and combine transactional data to provide detailed reports and summaries for operational personnel and supervisors.