DDN Digital Library. It also provides features that help users storing and selecting varieties of books. With its systematic categorization management, the items in the library will be categorized into types: newspapers; books; magazines; picture albums; and catalogs. They can be further searched with alphabetical keyword index. The contents of the library can be displayed by: titles display covers, spine or name list. The actual viewing is like flipping the pages of a real book. And the user ca