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routing indicator[′rüd·iŋ ‚in·də‚kād·ər]
A group of letters, engineered and assigned, to identify a station within a digital communications network.
A group of letters assigned to indicate the geographic location of a station; a fixed headquarters of a command, activity, or unit at a geographic location; or the general location of a tape relay or tributary station to facilitate the routing of traffic over tape relay networks.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.