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DDC classification

Dewey Decimal Classification: 10 main classes, 100 divisions and 1,000 sections. Click to browse the collection.

Main classes

2X

Divisions

Sections

  • 540Chemistry & allied sciences
  • 541Physical chemistry
  • 542Techniques, equipment & materials
  • 543Analytical chemistry
  • 544[Unassigned]
  • 545[Unassigned]
  • 546Inorganic chemistry
  • 547Organic chemistry
  • 548Crystallography
  • 549Mineralogy