A supplement is a publication that has a role secondary to that of another preceding or concurrent publication. A follow-on publication complements its predecessor, either by bringing it up to date (e.g. the Index Catalogue), or by otherwise enhancing the predecessor’s coverage of a particular topic or subject matter, as in the Tosefta. Supplements are particularly used in gaming hobbies. A newspaper supplement, often a weekly section of its parent, usually has a tabloid or Sunday magazine format and covers wide-ranging and less time-critical subjects