ISO/TR 11941:1996 is a Korean romanization system used in ISO. It is not commonly used; it is only used in Unicode character names.
It is very similar to Yale Romanization.
This system is used in Unicode character names. For example, the character ᄎ (U+110E) is named "HANGUL CHOSEONG CHIEUCH" (한글 초성 치읓); ㅊ is romanized as "ch." However, the character 차 (U+CC28) is named "HANGUL SYLLABLE CA"; ㅊ is romanized as "c."