Business System Component

If you want to address a particular business system as the sender or receiver of messages, choose this type.

A business system is an actual application system in a system landscape. A business system (communication component) comprises information about the inbound and outbound interfaces and the software component versions of the business system.

You usually use business system components when configuring application-to-application processes (or company-internal processes).

More information: Creating Communication Components for Business Systems

Business Component

If you want to address an abstract business entity as the sender or receiver of messages, choose this type.

Using a business component, you can define the technical or business subunits of the companies involved and then assign them the relevant interfaces.

You usually use business components when configuring business-to-business processes. In this case, you only make your interfaces known to the business partners involved and either do not make any details about your own system landscape available, or only specific details.

More information: Defining Business Components

Integration Process Component

If you want to address an integration process as the sender or receiver of messages, choose this type.

At runtime, these integration processes are controlled by messages and can themselves send messages.

More information: Creating Communication Components for Integration Processes