The 99 HS chapters are further subdivided into 1,244 headings and 5224 subheadings. Records were written in a legible, consistent hand writing with neatly underlined headings and subheadings. Residual codes normally occur last in numerical order under their related headings and subheadings. Classes might include common document elements such as a body, paragraphs, titles, subheadings, captions, etc. Abstracts that comprise one paragraph (no explicit subheadings) are often called unstructured abstracts. Abstracts in which these subheadings are explicitly given are often called structured abstracts. It is arranged alphabetically, into over 430 topics, which in turn are arranged into subheadings. PubMed automatically links to MeSH terms and subheadings. Detailed subheadings for each Module are specified for all jurisdictions. Many of these towns and population areas are listed under two major subheadings below. Most printed editions also show the actual Hebrew letters along with these subheadings. His books are listed below under three subheadings&colon; Modern Medicine, Traditional Medicine, and Religious Topics. This "guoran" heading has two subheadings. The subheadings indicate broadly the century in which a style arose. The C0 Controls and Basic Latin block contains six subheadings.