Focus on
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In 1938, thanks to years of work by a remarkable female agent, MI5 ensured a package of British defence plans stayed secret.
Series
Government Communications Headquarters: Early Computers: Reports
Catalogue reference: HW 76
What's it about?
HW 76
Compilation reports describing the design and construction of early computers in GCHQ including the logical design and circuit operation of each basic unit of equipment.
Full description and record details
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Reference (The unique identifier to the record described, used to order and refer to it)
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HW 76
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Title (The name of the record)
- Government Communications Headquarters: Early Computers: Reports
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Date (When the record was created)
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1949-1980
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Description (What the record is about)
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Compilation reports describing the design and construction of early computers in GCHQ including the logical design and circuit operation of each basic unit of equipment.
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Held by (Who holds the record)
- The National Archives, Kew
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Legal status (A note as to whether the record being described is a Public Record or not)
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Public Record(s)
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Language (The language of the record)
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English
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Creator(s) (The creator of the record)
- Government Code and Cypher School, 1919-1946
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Physical description (The amount and form of the record)
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8 volume(s)
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Access conditions (Information on conditions that restrict or affect access to the record)
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Open unless otherwise stated
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Immediate source of acquisition (When and where the record was acquired from)
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From 2007 Government Communications Headquarters
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Subjects (Categories and themes found in our collection (our subject list is under development, and some records may have no subjects or fewer than expected))
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Accruals (Indicates whether the archive expects to receive further records in future)
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No further accruals are expected
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Selection and destruction information (Information about how the record was selected for archiving)
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Records selected under Acquisition criteria 3.1.2 (External Relations and Defence)
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Administrative / biographical background (Historical or biographical information about the creator of the record and the context of its creation)
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These reports describe the design and construction of early computers developed in GCHQ after the Second World War, including Colorob (a major GCHQ project of a modular design using vacuum tube technology which combined the functionality of Colossus and Robinson, but operating 20 times faster).
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Record URL
- https://beta.nationalarchives.gov.uk/catalogue/id/C16516/
Catalogue hierarchy
Over 27 million records
This record is held at The National Archives, Kew
17,110 records
Within the department: HW
Records created or inherited by Government Communications Headquarters (GCHQ)
You are currently looking at the series: HW 76
Government Communications Headquarters: Early Computers: Reports
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