The Use Case in Figure \ref{fig:UseCase} depicts the services offered to external entities that are not apart of the PBAS system. This separation between internal and external aspects are represented by the box present in the diagram. The stick figures in the diagram represent the external actors that are looking to use services that are depicted as ovals in the diagram. These two entities are connected by solid lines and acknowledges their relationship. Also, there exist relationships between services that are visualized as dotted arrows and show that services are included or apart of the initiating service.