Bring your laptop, computers in Korea are in Hangul - software and hardware. most Korean electric outlets are 220v. find everywhere trasformers. if you don't have a laptop, no problem, there are internet cafes everywhere. bring pictures of your people, the first months are sometimes difficult to adapt, specially if any of you still looking for a job. if you are coming hired by a school (E2 visa)ask suggestions to one of their ESL teachers, usually they know the basic. travel not to heavy or light.