What is SAP? SAP is recognized as an ERP software practiced for integrating and automating complex business processes such as production planning, human resources management, inventory management, customer service, distribution, finances or logistics. SAP architecture is classified into three layers or servers. There is the presentation layer, the application layer, and the database layer. Each of them is capable of specific processes and presents to the good functioning of the whole system. They all work on separate servers unlike the two layer architecture, where the presentation layer and the application one were on the same server and the database layer was maintained independently. Though, the three layers architecture is usually utilized in production and in complex systems. We can even talk about one level SAP architecture, in which all data is stored on a single server. SAP R/3 Architecture When the client-server technology turned famous between the ERP developers