Technical Systems 
Definition
Technical systems are application systems that are installed in your system landscape. An example of an application system is a Customer Relationship Management (CRM) server. In the SLD, there are five types of technical systems:
· Web AS ABAP
Web AS ABAP technical systems, ranging from any R/3-based system to an APO server or CRM server, are based on the same Basis Component (BC), which includes the ABAP interpreter, ABAP Dictionary, ABAP Workbench, and so on. A dedicated database, which stores most of the data of the BC and the application components, is associated with the system.
· Web AS Java
Web AS Java systems consist of one or more instances and each instance is installed on a separate host. An instance itself consists of cluster nodes that can communicate with each other.
· Standalone Java
Standalone Java technical systems are standalone Java applications that are installed in a computer system from an administration perspective. They can also be installed as an operating system service or as a daemon.
· Third-Party
Third-party technical systems contain third-party software components and products.
Third-party systems are not automatically registered in the SLD. Therefore, you have to create them manually by creating:
· Third-party software components
· Third-party technical system
· Exchange Infrastructure (XI)
XI technical systems are the infrastructure systems (such as integration servers and adapter engines) of XI.
Use
Web AS ABAP and Web AS Java technical systems automatically register information in the SLD about most of the elements that they contain by using the SLD data supplier. Not all technical system elements are registered automatically in the SLD by the reporting system and you have to register them manually. You also have to register manually installed products on a technical system because a technical system has no information about which products are installed on it.
If automatic registration of Web AS ABAP and Web AS Java technical systems is not possible, you have to register them manually. You also have to register manually standalone and third-party technical systems.
Double-stack systems (Web AS ABAP and Java) appear in SLD both as a Web AS ABAP and as a Web AS Java system.
You can use the technical systems view to perform the following tasks:
· Create new Web AS ABAP technical systems
· Create new Web AS Java technical systems
· Create new standalone technical systems
· Create new third-party technical systems