文章来源: 朋友转发的电邮 作者: 不详 HOTEL KEY CARDS This is pretty good info. Never even thought about key cards containing anything other than an access code for the room! HOTEL KEY CARDS Ever wonder what is on your magnetic key card? Answer: a. Customer's na

文章来源: Wikipedia, the free encyclopedia Vertical service code From Wikipedia, the free encyclopedia In North American   telephony , a vertical service code or VSC is a special code dialed prior to a telephone number that engages some type of special tele