Not A menu originally referred to a list of various dishes provided by a restaurant. Now it is extended to refer to the list of options that appears on the display screen while the electronic computer program is in progress, and also refers to the list of various service items, etc., with a wider meaning.

The table of contents is the table of contents contained before the text of the book. It is a tool for revealing and reporting the book. The table of contents records the title, author, publication and collection of the book, and is arranged in a certain order to reflect the Tools for library modelling, reading guidance, and book retrieval. In computer applications, the development of directories has become "[ufolders[/." With the development of directory work, "[ucatalogology[/.