Head-directionality
Dominant Order (syntactic typology)
Hangul stroke order
Naver Dictionary
2018 D&T 수능대비 직전 모의고사(나) 주요문항 해설강의_주예지T
We say 알겠습니다 / al-ge-seum-ni-da to mean OK and confirm our understanding of what the other person has said, It's similar to I understand or I've got it.