McCune–Reischauer romanization is one of the two most widely used Korean-language romanization systems. It was created in 1937 and the ALA-LC variant based on it is currently used for standard romanization library catalogs in North America.
In this sign on Seoul Subway Line 8, Chamshil (잠실역) and Amsa (암사역) are romanized with the South Korean variant of McCune–Reischauer. They would be Jamsil and Amsa in Revised Romanization.