SAP GUI is SAP's universal client for accessing SAP functionality in SAP applications such as - SAP ERP, SAP Business Suite (SAP CRM, SAP SCM and SAP PLM), SAP Business Intelligence and so on. SAP GUI functions like a browser. It gets information from the SAP server like what, where, when and how, to display contents in its window. All members of the SAP GUI family have unique attributes that make them especially suited for different user environments.