Here are entered works of fiction written in diary form. Works of fiction written wholly or partially in the form of letters, telegrams, electronic mail messages, instant messages, etc. are entered under Epistolary fiction.
Here are entered works on the periodicals of the world and, with appropriate subdivisions, works on special aspects or sections of periodicals. Works on periodicals in a specific language, or in a specific country or larger area, are entered under the adjectival form of the language or area, e.g. Arabic periodicals; Canadian periodicals. --subdivision Periodicals under specific subjects, e.g. Engineering--Periodicals; United States--History--Periodicals