消息指示符  Message–Identifier MID; message indicator

告警指示讯号  1-Naphthylacetate; alarm indication signal

卫星信息讯息协议  satellite information message protocol; SIMP

信息讯息  informational message; Information message

讯息指令  message instruction

端对端信息指示元  End-to-end Information Indicator

路由选择信息指示器  RII Routing Information Indicator

旅客信息指示系统  PIIS (Passenger Information Indicator System; PIIS Passenger Information Indicator System

频态内信息指示元  In-band Information Indicator

信息指示器  Information indicator

信息指示系统  information indicator system

标示指示  Be; BCC

操作指示符  function designator

层次指示符  level indicator

差示指示器  differential indicator

长度指示符  length indicator

档尾指示符  end of file indicator

地址赋能指示符  AE indicator

地址路由指示符  address routing indicator