Classification
prev ...
531 - Classical mechanics; solid mechanics
3
534 - Sound & related vibrations
22
535 - Light & infrared & ultraviolet phenomena
5
537 - Electricity & electronics
7
539 - Modern physics
1
540 - Chemistry & allied sciences
86
541 - Physical chemistry
3
542 - Techniques, equipment & materials
4
543 - Analytical chemistry
2
546 - Inorganic chemistry
1
547 - Organic chemistry
14
550 - Earth sciences
15
551 - Geology, hydrology & meteorology
109
570 - Life sciences; biology
68
571 - Physiology & related subjects
5
572 - Biochemistry
2
573 - Specific physiological systems in animals
2
574 - [Unassigned]
1
576 - Genetics & evolution
191
580 - Plants (Botany)
193
581 - Specific topics in natural history
41
590 - Animals (Zoology)
2
591 - Specific topics in natural history
1
600 - Technology
18,445
610 - Medicine & health
490
611 - Human anatomy, cytology & histology
1
612 - Human physiology
73
613 - Personal health & safety
1
614 - Incidence & prevention of disease
2
615 - Pharmacology & therapeutics
28
616 - Diseases
10
617 - Surgery & related medical specialties
3
618 - Gynecology, obstetrics, pediatrics & geriatrics
1
620 - Engineering & allied operations
1,220
621 - Applied physics
3,664
624 - Civil engineering
14
627 - Hydraulic engineering
3
628 - Sanitary & municipal engineering
3
629 - Other branches of engineering
263
630 - Agriculture & related technologies
87
631 - Techniques, equipment & materials
1
641 - Food & drink
1
643 - Housing & household equipment
4
650 - Management & auxiliary services
101
651 - Office services
5
657 - Accounting
12
658 - General management
1,539
659 - Advertising & public relations
37
660 - Chemical engineering
5
662 - Explosives, fuels & related products
2
more ...