Applications
Basically, the open-system environment model is a basic building block of several technical reference models and technical architecture. A technical architecture identifies and describes the types of applications, platforms, and external entities; their interfaces; and their services; as well as the context within which the entities interoperate. A technical architecture is based on a technical reference model (TRM) and the selected standards that further describe the TRM elements (the profile). The technical architecture is the basis for selecting and implementing the infrastructure to establish the target architecture.
A technical reference model can be defined as a taxonomy of services arranged according to a conceptual model, such as the Open System Environment model. The enumerated services are specific to those needed to support the technology computing style (e.g., distributed object computing) and the industry/business application needs (e.g., Human Services, financial).
Read more about this topic: Open-system Environment Reference Model