`` ok. '' reference material 2005:0db8 : ac15 : fe03 : : - artificial intelligence ( designated art ) 2012:0db8 : ac13 : fb03 : : - mobil unit software development ( designated mobile ) 2109:0db8 : ac15 : eb24 : : - data files ( designated files ) 2012:0db8 : aa23 : eb13 : : - financial systems ( designated fin ) 2015:0db8 : ac25 : ff03 : : - external communications , space station ( designated comm ) 2007:0db8 : ac25 : eb14 : : - communications server `` transmit in the blind '' - term used by pilots to update their status over the radio when no one has responded .