What Does International Standard Serial Number (ISSN) Mean?

An International Standard Serial Number (ISSN) is a unique serial number used to identify a publication or printed literature. ISSN is an eight-digit number that helps categorizing books, especially those having the same title. Libraries and bookshops keep the details, cataloging and other such information about books according to their unique serial number.

Techopedia Explains International Standard Serial Number (ISSN)

The International Standard Serial Number is used for serial publications, such as magazines or comic books, as opposed to the International Standard Book Number (ISBN), which is used for books.