University System class diagram models a hierarchical academic institution structure with University, Department, Faculty, and Student entities using composition and association relationships. University owns multiple Departments through composition, while Departments associate with Faculty members and Students, establishing clear lifecycle dependencies and cardinality constraints. This design demonstrates core object-oriented principles including encapsulation, inheritance hierarchies, and relationship modeling essential for enterprise education management systems. Fork this diagram on Diagrams.so to customize entity attributes, add Course or Grade classes, or export as .drawio/.svg for your UML documentation. The composition pattern ensures Departments cannot exist independently of a University, enforcing referential integrity at the design level.