对所有书籍的相关信息进行统一管理，除了书籍本身自带信息外，还提供书籍的来源、存放的部门、所属的科目、书籍的去向等相关信息。另外，系统实现外借业务，包括借书证管理...

代码说明：

对所有书籍的相关信息进行统一管理，除了书籍本身自带信息外，还提供书籍的来源、存放的部门、所属的科目、书籍的去向等相关信息。另外，系统实现外借业务，包括借书证管理、借书管理、还书管理。-For all books related to information management, in addition to their own information books, but also provide a source of books, the department store, their subjects, the future of books and other related information. In addition, the system lending business, including library card management, library management, management books.