the Linesman/Mediator system Collection of TAC working papers and reports at Centre for the History of Science, Technology and Medicine, The University of Manchester; archived on 19 February 2005 RX12874 - Passive Detection – the radar system and Baddow; the computer described is TAC "Forty Years of Marconi Radar from 1946 to 1986" – GEC Review, vol 13 no. 3, 1998 pp172–189; archived 19 March 2003 Military radars of the United Kingdom Air defence radar networks