"Contents" refers to the material or substance contained within something, such as a book, document, or container. In the context of written works, it often refers to the list of chapters, sections, or topics presented in a structured format, helping readers navigate the content easily. A "Table of Contents" typically provides a summary of the main sections and sub-sections of a work, highlighting its organizational structure. In a broader sense, "contents" can also apply to the elements or substances inside any container or object, whether physical (like a box) or digital (such as files or data in a system).