Classification
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577 - Ecology
40
578 - Natural history of organisms
1
579 - Microorganisms, fungi & algae
7
580 - Plants (Botany)
8
581 - Specific topics in natural history
2
590 - Animals (Zoology)
5
592 - Invertebrates
1
600 - Technology
3
601 - Philosophy & theory
2
604 - Special topics
4
610 - Medicine & health
147
611 - Human anatomy, cytology & histology
6
612 - Human physiology
19
613 - Personal health & safety
8
614 - Incidence & prevention of disease
4
615 - Pharmacology & therapeutics
18
616 - Diseases
86
617 - Surgery & related medical specialties
37
618 - Gynecology, obstetrics, pediatrics & geriatrics
2
620 - Engineering & allied operations
6,396
621 - Applied physics
3,580
624 - Civil engineering
715
627 - Hydraulic engineering
15
628 - Sanitary & municipal engineering
80
629 - Other branches of engineering
1,106
630 - Agriculture & related technologies
9
631 - Techniques, equipment & materials
13
634 - Orchards, fruits & forestry
4
641 - Food & drink
20
650 - Management & auxiliary services
75
651 - Office services
1
657 - Accounting
5
658 - General management
520
660 - Chemical engineering
342
664 - Food technology
20
667 - Cleaning, color & coating technologies
4
670 - Manufacturing
628
677 - Textiles
61
690 - Buildings
199
691 - Building materials
9
693 - Specific materials & purposes
13
697 - Heating, ventilating & air-conditioning
17
700 - The arts; fine & decorative arts
2
710 - Civic & landscape art
2
720 - Architecture
22
725 - Public structures
4
729 - Design & decoration
2
740 - Drawing & decorative arts
1
780 - Music
5
794 - Indoor games of skill
5
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