Old Library Website use case diagram maps three actor roles—Student, Librarian, and Administrator—against core library operations including login, book search, borrowing, returns, and user management. Students interact with login, search, viewing catalogs, and borrowing workflows, while librarians manage book records and user accounts, and administrators oversee user management policies. This UML use case model clarifies functional requirements and actor responsibilities, essential for requirements gathering and system design phases. Fork and customize this diagram on Diagrams.so to document your own library or institutional management system architecture.