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
Opposite Worlds Opposite Worlds Opposite Worlds is an American reality game show that originally aired on the cable channel Syfy. The show premiered on January 21, 2014 and aired on Tuesdays and Wednesdays, with the latter being a live elimination episode. The format of the show is based on the successful Chilean series "Mundos Opuestos" which aired from 2012 to 2013 on the cable channel Canal 13. The series revolves around a group of strangers living in a house that is divided by a "future" and "past" theme. The contestants are divided into two teams, and compete in weekly challenges to determine