University System ER diagram models the core entities and relationships in an academic institution: Students, Doctors (faculty), Departments, Courses, Rooms, and Enrollments. Data flows from Students and Doctors through Departments to Courses, with Enrollments capturing the many-to-many relationship between Students and Courses, and Rooms assigned to Courses. This normalized schema demonstrates best practices for managing student records, faculty assignments, course catalogs, and classroom allocation while maintaining referential integrity. Fork and customize this diagram on Diagrams.so to adapt it for your institution's specific requirements, add additional entities like Prerequisites or Grades, or export as .drawio or PNG for documentation. The legend clearly distinguishes total participation (mandatory) from partial participation (optional) relationships, making it ideal for database design reviews and academic system planning.