This is about a 5,000-year-old technology. Some of you may have used it before. It's kind of on its way out now, but we still use it for 99 percent of our stuff.
약 5,000년 전에 고안된 기술이죠. 여러분 중 몇분도 전에 써 보셨을지 모르겠습니다.