International Standard Music Number 3 left to right. These weighted digits are added together. The check digit is the integer between 0 and 9 that makes the sum a multiple of 10. For instance, for the item with ISMN beginning 979-0-060-11561: As 85 mod 10 = 5, the check digit is 10 - 5 = 5 and the full number is 979-0-060-11561-5. For another example, Robert Fripp's collection of Guitar Craft scores has the ISMN 979-0-9016791-7-7. Given first 12 digits 979-0-9016791-7, the ISMN algorithm evaluates which implies that the check digit is indeed 7 (because 123+7=130=13x10). International Standard Music Number The International Standard Music
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