Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
컴퓨터의 입출력포트는 다양한 장치를 연결하는 데 사용됩니다.keompyuteoui ipchullyeok poteun daeyanghan jangchireul yeongyeolhaneun de sayongdoemnida.The computer's I/O port is used to connect various devices.