4.1. What is system?4.2. Boundaries of the system4.3. Resolution of the system description4.4. Conceptual commitment for system descriptions4.5. System architecture4.6. Example of an architecture framework4.7. Elements of a system4.8. System knowledge involves multiple viewpoints4.9. Concept of operations (CONOP)4.10. Network configuration4.11. System life cycle and assurance