A table of contents is a table of contents contained in front of the text of a book, and it is a tool for revealing and reporting books. Catalogue is a tool to record book titles, authors, publications and collections, arranged in a certain order to reflect the library model and guide reading and retrieval of books. In computer applications, the development of a directory has become a "folder". With the development of catalogue work, "bibliography" has been derived.

An outline is an official document that summarizes the outline and main points. It doesn't write the whole content of the full text, only the main content. The outline is used to report the work, convey the spirit of the meeting and make a speech. Because some situations and materials are very complicated and specific, and I am particularly familiar with them. These specific materials are all in my mind, and there is no need to write them out one by one. As long as the outline is listed, the related materials can be connected in series.