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SAP (Systems, Applications, and Products) architecture refers to the overall structure and design principles that govern the organization and interconnection of SAP software components. SAP systems are widely used in businesses for enterprise resource planning (ERP) to integrate and manage various business processes. The architecture of SAP is modular and consists of different layers, each serving specific functions. Here's an overview of the key components in SAP architecture:

Presentation Layer:

The presentation layer is the user interface through which users interact with the SAP system. It includes graphical user interfaces (GUIs) and web-based interfaces that allow users to input data, run applications, and view reports.
Application Layer:

The application layer contains the application servers responsible for executing business logic and processing user requests. This layer handles the processing of various business transactions and functionalities such as financial accounting, material management, and human resources.
Database Layer:

The database layer stores and manages the data generated and processed by the SAP system. It includes a relational database management system (RDBMS) where data is stored in tables. SAP supports various databases like Oracle, Microsoft SQL Server, and SAP HANA.