Thema Subject Categories 1.4

Previous versions of Thema are still available 1.3 1.2 1.1 1.0.

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Notation Category heading Add Mod ?
P Mathematics and Science
Use all P* codes for: mostly academic, technical and specialist titles and some general adult works. Qualifiers are mostly not required with P* codes. DO NOT USE: code ‘P’ itself, but select specific categories from section P*.
Prefer: WN* codes for general interest adult titles where appropriate
1.4
PN Chemistry
See also: TDC Industrial chemistry and chemical engineering, TQ* Environmental science, engineering and technology and its subcategories
PNF Analytical chemistry
PNFC Chromatography
PNFR Magnetic resonance
PNFS Spectrum analysis, spectrochemistry, mass spectrometry

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