ISN is a common abbreviation for "International Standard Name Identifier", a unique identifier assigned to all public figures including writers, musicians, actors, and more. Some synonyms that could be used to refer to the ISN are global identification number, worldwide identification code, international identification marker, or universal name identifier. These synonyms convey the same meaning as the ISN but provide different ways to describe the identifier. The ISN is important for people who work with public figures, libraries, and archives as it helps to ensure accurate identification and management of the associated data and metadata.