responsible for the extensive War Office Y Group and briefly, for the Radio Security Service. MI8 was the signals intelligence department of the War Office that...

The Federal Security Service of the Russian Federation (FSB) is the principal security agency of Russia and the main successor agency to the Soviet Union's...

The Central Security Service (CSS) is a combat support agency of the United States Department of Defense which was established in 1972 to integrate the...

The Security Service of Ukraine (Ukrainian: Служба безпеки України, romanized: Sluzhba bezpeky Ukrainy; abbreviated as SBU or SSU) is the main internal...

The Security Service (Polish: Służba Bezpieczeństwa; Polish pronunciation: [ˈswuʐba bɛspʲeˈt͡ʂɛɲstfa]), in full Security Service of the Ministry of Internal...

Family Radio Service (FRS) is an improved walkie-talkie radio system authorized in the United States since 1996. This personal radio service uses channelized...

The Swedish Security Service (Swedish: Säkerhetspolisen [ˈsɛ̂ːkɛrheːtspʊˌliːsɛn], abbreviated SÄPO [ˈsɛ̌ːpʊ] ; until 1989 Rikspolisstyrelsens säkerhetsavdelning...

Radio is the technology of communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz...

A personal radio service is any system that allows individuals to operate radio transmitters and receivers for personal purposes with minimal or no special...

The State Security Service (Uzbek Davlat Xavfsizlik Xizmati, DXX; in Russian Служба государственной безопасности, СГБ, often romanised as SGB) is the national...