GC&CS definitions

GC&CS

Government Code and Cipher School. Forerunner of GCHQ. Part of SIS from 1923 to 1947.
Found on http://www.encyclo.co.uk/local/20789

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GC&CS

Government Code and Cipher School - based at Bletchley Park, England
Found on https://www.encyclo.co.uk/local/20490

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