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
SZD-22 Mucha Standard SZD-22 Mucha Standard The SZD-22 Mucha Standard ("Szybowcowy Zakład Doświadczalny" - Glider Experimental Works) was a single-seat aerobatic glider designed and built in Poland from 1957. Developed especially for the 1958 World Gliding Championships, the SZD-22 Mucha Standard was a direct descendent of the IS-2 Mucha ("Fly"), from 1948, and SZD-12 Mucha 100, from 1953, with very similar lines and dimensions. The Mucha Standard was designed to the new Standard class rules which discarded the old Olympic 15-15-15 Span, Aspect Ratio, Area rule. The first flight of the SZD-22 took place at Bielsko with Adam Zientek at the controls on