This report outlines the software engineering design of a library management system, focusing on UML diagrams. It details requirements such as checkout, return, reserve, and renew functionalities for books, DVDs, and magazines, primarily used by librarians. The report includes class diagrams illustrating classes like Borrower, Item, Librarian, Transaction, and Reservation, along with their attributes, operations, and relationships. Object diagrams depict system states, while OCL constraints define limitations and rules for fines and reservations. State machine diagrams manage item availability, and sequence and communication diagrams illustrate the checkout process. The document also addresses a banking system class diagram and showcases the relationships of the two classes with attribute values. Desklib provides this and other solved assignments for students.