对磁盘格式化.

覆盖保存在硬盘上的文件系统，但不退出.

保存文件系统到指定目录文件，但不退出.

删除指定目录文件系统.

显示当前系统默认存储目录.

安全退出该文件系统,保存信息.

创建子目录.

删除子目录.

显示当前目录下信息.

更改当前目录.

创建一个新文件,并且打开.

打开指定目录文件的文件系统.

关闭文件.　　

选择一个打开的文件写入信息,以$表示结束.

选择一个打开的文件读取信息.

删除文件.-Formatted disk. Coverage stored on the hard drive file system, but does not exit. Save the file system directory to the specified file, but does not quit. Directory to delete the specified file system. Show that the current system default storage directory. Safety from the file system, save information. to create a subdirectory. delete the subdirectory. Displays the current directory information. to change the current directory. to create a new file, and open. to open the specified file system directory. close the file. Select a file open to write information to $ that end. select a file open to read the information. delete files.