Periodical literature
Periodical literature (singularly called a periodical publication or simply a periodical) consists of published works that appear in new releases on a regular schedule (issues or numbers, often numerically divided into annual volumes). The most familiar example of periodical literature is the newspaper, but the magazine and the academic journal are also periodicals, as are some modern websites, e-journals, and other electronic-only publications produced recurrently on a schedule. Periodical publications cover a wide variety of topics, from academic, technical, and trade, to general-interest subjects such as leisure and entertainment.
Articles within a periodical are usually organized around a single main subject or theme and include a title, date of publication, author(s), and brief summary of the article. A periodical typically contains an editorial section that comments on subjects of interest to its readers.