International Standard Serial Number International Standard Serial Number An International Standard Serial Number (ISSN) is an eight-digit serial number used to uniquely identify a serial publication. The ISSN is especially helpful in distinguishing between serials with the same title. ISSN are used in ordering, cataloging, interlibrary loans, and other practices in connection with serial literature. The ISSN system was first drafted as an International Organization for Standardization (ISO) international standard in 1971 and published as ISO 3297 in 1975. ISO subcommittee TC 46/SC 9 is responsible for maintaining the standard. When a serial with the same content is published in more than one media
Amazon Standard Identification Number Amazon Standard Identification Number An Amazon Standard Identification Number (ASIN) is a 10-character alphanumeric unique identifier assigned by Amazon.com and its partners for product identification within the Amazon organization. ASINs were once unique worldwide, but global marketing has changed so that ASINs are only guaranteed unique within particular marketplaces. Accordingly, the same product may have several ASINs though, and different national sites may use a different ASIN for the same product. In general, ASINs are unlikely to be different between the country sites specially if they are for a class of product where the ASIN is based on an externally