该系统主要分为两部分：读者部分和管理部分。为了方便读者查找自己感兴趣的主题进行阅读，要将图书按照内容进行分类。读者可以按照类别进行查找，逐级浏览。-The system comprises two major components: readers and administrative areas. For the convenience of readers find their own topics of interest to read, in accordance with the co