Serials, periodicals and journals
In publishing or library science, the term serial is applied to materials "in any medium issued under the same title in a succession of discrete parts, usually numbered (or dated) and appearing at regular or irregular intervals with no predetermined conclusion."
In contrast, 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." This includes magazines and journals, but not proceedings or newspapers.
Magazines are the most typical type of periodical, and therefore have their own entry and category.
Other serials, periodicals and journals produced by scientific, artistic, academic or special interest publishers are often subscription-only, much more expensive, narrowly limited in circulation, and have little or no advertising.