The document defines and provides examples of different types of information systems: Transaction Processing Systems (TPS) which record daily business transactions; Office Automation Systems (OAS) which allow employees to perform tasks electronically; Knowledge Work Systems (KWS) which promote knowledge creation and sharing; Decision Support Systems (DSS) which help managers make decisions from various data sources; Executive Support Systems (ESS) which provide executive-level reports; and Group Decision Support Systems (GDSS) which support collaborative group projects through digital tools and resources. Each system type is defined and examples of related systems are provided.