A family of Microsoft word processing software products for creating web, email, and print documents.
Actually, by default the TOC includes paragraphs in one of Word's built-in heading styles 1, 2, and 3 AND all other paragraphs that have an outline level of 1, 2, or 3. But you can customize the TOC to include other styles and outline levels. See http://wordfaqs.ssbarnhill.com/TOCTips.htm.