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.
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” 

PBB  Philosophy of mathematics 

PBC  Mathematical foundations… 

PBD  Discrete mathematics Class here: finite mathematics 

PBF  Algebra 

PBG  Groups and group theory 

PBH  Number theory 

PBJ  Precalculus 

PBK  Calculus and mathematical analysis… 

PBM  Geometry… 

PBP  Topology… 

PBT  Probability and statistics… 

PBU  Optimization… 

PBV  Combinatorics and graph theory 

PBW  Applied mathematics… See also: TBJ “Maths for engineers”; PDE “Maths for scientists”; UYAM “Maths for computer scientists” 

PBX  History of mathematics 
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