SAP R/3 System is an early version of the SAP Enterprise Resource Planning Systems (SAP ERP) , which was introduced in 1992 and has developed over the years into a leading ERP system. The "R" in the product name stands for "Real-time data processing" and the "3" for the three-stage structure of the system consisting of a database, application server and user interface. It had a simple user interface and could be integrated with various systems and applications. Until December 2003, the SAP software was marketed under the name SAP R/3 and finally in 2004 was replaced by SAP ECC (ERP Central Component) replaced.

SAP R/3 was modular in design and consisted of a number of different components that perform different functions. The most important components of SAP R/3 include the application software, the database, the user interface and the technical infrastructure. The application software includes applications for Finance , Shopping , logistics , production and distribution . The user interface allows users to access the database and operate the applications.

The many individual SAP R/3 modules focus on different aspects of business operations. These include processing financial transactions, generating reports, and managing suppliers and customers. In addition, SAP R/3 extends a range of applications that help companies execute their business processes, such as production planning, budgeting, and inventory management.

SAP R/3 offered in-depth features for integrating different systems, such as ERP and CRM systems. It also supports various database systems, such as Oracle and Microsoft SQL Server.