Classification
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542 - Techniques, equipment & materials
4
641 - Food & drink
4
662 - Explosives, fuels & related products
4
691 - Building materials
4
745 - Decorative arts
4
320 - Political science
3
338 - Production
3
622 - Mining & related operations
3
623 - Military & nautical engineering
3
681 - Precision instruments & other devices
3
690 - Buildings
3
003 - Systems
2
381 - Commerce
2
535 - Light & infrared & ultraviolet phenomena
2
537 - Electricity & electronics
2
538 - Magnetism
2
548 - Crystallography
2
574 - [Unassigned]
2
579 - Microorganisms, fungi & algae
2
616 - Diseases
2
650 - Management & auxiliary services
2
678 - Elastomers & elastomer products
2
100 - Philosophy & psychology
1
170 - Ethics
1
344 - Labor, social, education & cultural law
1
362 - Social welfare problems & services
1
400 - Language
1
410 - Linguistics
1
502 - Miscellany
1
514 - Topology
1
515 - Analysis
1
520 - Astronomy & allied sciences
1
534 - Sound & related vibrations
1
578 - Natural history of organisms
1
581 - Specific topics in natural history
1
592 - Invertebrates
1
617 - Surgery & related medical specialties
1
624 - Civil engineering
1
634 - Orchards, fruits & forestry
1
647 - Management of public households
1
657 - Accounting
1
663 - Beverage technology
1
676 - Pulp & paper technology
1
686 - Printing & related activities
1
688 - Other final products & packaging
1
702 - Miscellany of fine & decorative arts
1
746 - Textile arts
1