Browse the BIC Subject Categories and Qualifiers

This is BIC’s Subject Categories and Qualifiers Scheme, version 2 revision 01, the standard classification scheme for the UK book trade and other English language markets, available from You can also browse version 1.2 of the new Thema international, multilingual subject category scheme.

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Code Description
P Mathematics and science
Do not use “P” on individual books; select appropriate code(s) from Section P below
PB Mathematics
See also: VSN “Adult numeracy guides and handbooks”
PD Science: general issues
PG Astronomy, space and time
For popular astronomy, use WNX “Popular astronomy and space”; for astrophysics, use PHVB “Astrophysics”; for space travel and exploration, see TTD “Space science”
PH Physics
For experimental techniques, use PDN “Scientific equipment, experiments and techniques” plus appropriate PH* code
PN Chemistry
For laboratory technique and experiments, use PDN “Scientific equipment, experiments and techniques” plus appropriate PN* code. See also: TDC “Industrial chemistry”. For environmental chemistry, see TQ “Environmental science, engineering and technology and following”
PS Biology, life sciences
See also: WN “Natural history” and following

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