Star Trek: Acronym for Optical Data Network, the networking substrate of The Federation computer systems. Probably akin to OSI Layers 1 & 2 in todays terms (what protocol does it use? TCP?). Endless bandwidth, apperantly. The system also appears to chronicly be built with substandard parts; how many times have we heard Chief O'Brian say he's got to go replace the ODN conduit in Section 12/Z?