Periodicals are publications that are issued on a regular basis. Some of the examples of periodicals are weekly
magazines,
journals, Trade publications and
newspapers. Each type of periodicals has its own characteristics and purpose. In contrast to serials in general, a periodical has been defined as "A serial publication with its own distinctive title, containing a mix of articles ... by more than one contributor, issued ... at regular stated intervals of less than a year, without prior decision as to when the final issue will appear." Thus a periodical does not admit irregularly spaced publication times. This includes
magazines and
journals, but not
proceedings, but traditionally excludes
newspapers. Thus all periodicals are serials but not all serials are periodicals. ==See also==