Classification
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577 - Ecology
18
579 - Microorganisms, fungi & algae
9
580 - Plants (Botany)
13
581 - Specific topics in natural history
3
589 - [Unassigned]
1
592 - Invertebrates
1
599 - Mammals
1
600 - Technology
150
606 - Organizations
1
610 - Medicine & health
125
611 - Human anatomy, cytology & histology
1
612 - Human physiology
11
615 - Pharmacology & therapeutics
22
616 - Diseases
26
617 - Surgery & related medical specialties
2
620 - Engineering & allied operations
1,019
621 - Applied physics
266
623 - Military & nautical engineering
2
624 - Civil engineering
4
628 - Sanitary & municipal engineering
18
629 - Other branches of engineering
12
630 - Agriculture & related technologies
24
631 - Techniques, equipment & materials
13
632 - Plant injuries, diseases & pests
1
634 - Orchards, fruits & forestry
1
641 - Food & drink
2
658 - General management
15
660 - Chemical engineering
88
661 - Industrial chemicals
3
664 - Food technology
11
665 - Industrial oils, fats, waxes & gases
1
667 - Cleaning, color & coating technologies
4
668 - Technology of other organic products
2
670 - Manufacturing
16
677 - Textiles
1
681 - Precision instruments & other devices
6
690 - Buildings
1
691 - Building materials
4
700 - The arts; fine & decorative arts
68
720 - Architecture
3
791 - Public performances
1
800 - Literature & rhetoric
2
900 - History & geography
15