BIC Subject Categories and Qualifiers

This is BIC’s Subject Categories and Qualifiers Scheme, version 2.1 released November 2010, the standard classification scheme for the UK book trade and some other English language markets, available from www.bic.org.uk.

Note that BIC has announced that there will be no further development of the BIC scheme, and that Thema is its preferred subject scheme for current and future use. Browse the latest version of the Thema international, multilingual subject category scheme here.

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Code Description
T Technology, engineering, agriculture
Do not use “T” on individual books; select appropriate code(s) from Section T below
TQ Environmental science, engineering and technology
Note: use for technical and practical aspects of environment, pollution, waste disposal, etc. See also: RN “The Environment” and following for ‘issues’-based approaches
TQD Environmental monitoring
TQK Pollution control
TQS Sanitary and municipal engineering


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