Book management system and computer file system are both part of computer management system, which are used to manage and organize specific types of information. Book management system is aimed at the management of library resources, while computer file system is aimed at the management of file storage space in computers. They all involve data storage and retrieval. The book management system realizes the management and retrieval of books by recording the book title, author, publishing house and other related information. Computer file system realizes the storage and retrieval of files by maintaining the directory structure and metadata of files. They all need to interact with multiple participants. The book management system involves the cooperation and information exchange among libraries, publishers, readers and administrators. Computer file system needs to interact with users, applications and operating systems to create, read, write and delete files. Although there are differences between the book management system and the computer file system in concrete implementation and function, they are both part of the computer management system, aiming at effectively managing and organizing specific types of information.