teleprinter signal generator

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• SIGSALY — exhibit at the National Cryptologic Museum In cryptography, SIGSALY (also known as the X System, Project X, Ciphony I, and the Green Hornet) was a secure speech system used in World War II for the highest level Allied communications. It pioneered …   Wikipedia

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• Army Communications and Information Systems (United Kingdom) — The British Army operates a wide range of communications and information systems [ [http://www.army.mod.uk/3512.aspx Royal Signals Equipment] ] . Some of these are specialised military systems, while others are procured off the shelf. They fall… …   Wikipedia