Asynchronous Transfer Mode
  異步傳輸模式,(是一種利用固定大小封包動態調配頻寬的方法,也叫快速信包)
  asynchronous transfer mode
       n : a means of digital communications that is capable of very
           high speeds; suitable for transmission of images or voice
           or video as well as data; "ATM is used for both LAN and
           WAN" [syn: ATM]