This course provides a comprehensive guide to the fundamentals of the ABAP platform, including SAP S/4HANA's three-tier architecture, system instances, work processes, and SAP HANA in-memory database technology. You will explore user interfaces (SAP GUI, Business Client, Fiori), dialog/background services, column-store databases, and internet integration via ICM/ICF. The curriculum is an essential resource for understanding enterprise SAP system components, instance management, memory optimization, and modern web connectivity in production environments.