Hangul Compatibility Jamo
Hangul Compatibility Jamo is a Unicode block containing Hangul characters for compatibility with the South Korean national standard KS X 1001. Its block name in Unicode 1.0 was Hangul Elements.
The Hangul Compatibility Jamo block represents consonants in initial and final position with the same codepoints, while the Hangul Jamo block assigns them separate codepoints.