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Threat Signal, United States Army Signal Corps, Signal Hill, California, Signal analyzer, Distress signal, Federal Signal Corporation, Traffic signal preemption, Signal Mountain, Cab signalling, 47th (London) Signal Regiment, 36th (Eastern) Signal Regiment, Russian Signal Troops, 42nd (East Lancashire) Signal Regiment, Standard frequency and time signal service, City of London Signals, Royal Corps of Signals, Union Switch & Signal, 50th (Northumbrian) Signal Regiment, Signal peptidase I, North American railroad signals, 43rd (Wessex) Signal Regiment, 44th (Home Counties) Signal Regiment, List of peaks named Signal, Bus priority signal, 232nd Signal Regiment (Italy), 34th (Northern) Signal Regiment, Signal to Noise, C signal handling, London District Signals, 39th (Skinners) Signal Regiment, Railway signalling, Signaling (telecommunications), 40th (Ulster) Signal Regiment, International maritime signal flags, Signal Intelligence Service, Busy Signal, 47th Signal Battalion "Gennargentu", 7th Signal Regiment (United Kingdom), 12th Signal Brigade (United Kingdom), Flag signals, 11th Signal and West Midlands Brigade, Digital signal (signal processing), Multidimensional signal processing, 516th Signal Brigade, 9th Army Signal Command (United States), 2nd Signal Regiment (United Kingdom), Mixed-signal integrated circuit, Chief Signal Officer of the United States Army, Central Signal Village, 21st Signal Regiment (Electronic Warfare)

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