YSK: Why U.S. radio and TV station call letters start with either a "W" or a "K".
from /r/YouShouldKnow
YSK:爲什麼美國電臺和電視臺的呼號以 "W "或 "K "開頭。
YSK:爲什麼美國電臺和電視臺的呼號以 "W "或 "K "開頭。
YSK: Why U.S. radio and TV station call letters start with either a "W" or a "K".
from /r/YouShouldKnow