https://www.ibm.com/docs/en/ste/11.0.1?topic=introduction-overview-sap-r3-interfaces
Overview of SAP R/3 interfaces
sap r 3overviewinterfaces
https://www.ibm.com/docs/en/ste/10.1.2?topic=applications-setting-up-your-sap-r3-environment
Setting up your SAP R/3 environment
The system requirements for installing and running SAP R/3 on Windows and UNIX platforms are detailed in the following sections.
sap r 3setting upenvironment
https://www.ibm.com/docs/en/ste/11.0.0?topic=introduction-overview-sap-r3-interfaces
Overview of SAP R/3 interfaces
sap r 3overviewinterfaces
https://www.deutsche-digitale-bibliothek.de/item/N6XDXEFVTTDGOMHB6SMVMIX67HDPGAY6
SAP R 3 system administration : the official SAP guide - Deutsche Digitale Bibliothek
sap r 3system administrationthe official