Do you use honorifics?

We rely heavily on them. Some examples are
형 hyung (Brother or older male, used by males
누나 noona (older sister, used by males)
오빠 oppa (Older male, brother, used by girls)
언니 Eon-nee (older sister, used by girls)
아저씨 Ahjussi (Used to call a middle-aged man. Can be considered insulting.)
아줌마 Ahjumma (Used to call older woman, can be considered insulting for younger)
선배 Sunbae (You older more experienced coworker)

And you have to bow to the person higher than you in status too.