Table of content

A table of contents, usually headed simply "Contents" and abbreviated informally as TOC, is a list, usually found on a page before the start of a written work, of its chapter or section titles or brief descriptions with their commencing page numbers.

Pliny the Elder credits Quintus Valerius Soranus (d. 82 B.C.) as the first author to provide a table of contents to help readers navigate a lengthy work. Pliny's own table of contents for his encyclopedic Historia naturalis ("Natural History") may be viewed online in Latin and in English (following dedication).

A table of contents usually includes the titles or descriptions of the first-level headers, such as chapter titles in longer works, and often includes second-level or section titles (A-heads) within the chapters as well, and occasionally even third-level titles (subsections or B-heads). The depth of detail in tables of contents depends on the length of the work, with longer works having less. Formal reports (ten or more pages and being too long to put into a memo or letter) also have a table of contents. Within an English-language book, the table of contents usually appears after the title page, copyright notices, and, in technical journals, the abstract; and before any lists of tables or figures, the foreword, and the preface.

Printed tables of contents indicate page numbers where each part starts, while digital ones offer links to go to each part. The format and location of the page numbers is a matter of style for the publisher. If the page numbers appear after the heading text, they might be preceded by characters called leaders, usually dots or periods, that run from the chapter or section titles on the opposite side of the page, or the page numbers might remain closer to the titles. In some cases, the page number appears before the text.

...
Wikipedia