The Given package diagram is of the Library Management System. Core Entities, User Management, Content Management, and Transaction Management are the main packages. Sub-packages include Books, Journals, Library Card, Bookshelf, Reserved Books. Reservation sub-package access the other packages like user, journal, and Books It requires help from these packages for its task. Bookshelf access the journal and books as well. The authorship subpackage also requires help from books and journals as well