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McCune–Reischauer one of the two most widely used Korean language romanization systems led us to Distributed Wikipedia powered by IPFS page 
"The system was created in 1937 by George M. McCune and Edwin O. Reischauer. With a few exceptions, it attempts not to transliterate Korean hangul but to represent the phonetic pronunciation. McCune–Reischauer is widely used outside Korea. A variant of it was used as the official romanization system in South Korea from 1984 to 2000. A third system, the Yale Romanization system, which is a transliteration system, exists but is used only in academic literature, especially in linguistics"