Classification
700 - The arts; fine & decorative arts
173
600 - Technology
149
620 - Engineering & allied operations
125
610 - Medicine & health
109
000 - Computer science, information & general works
101
333 - Economics of land & energy
79
580 - Plants (Botany)
76
900 - History & geography
64
540 - Chemistry & allied sciences
51
363 - Other social problems & services
50
140 - Specific philosophical schools
38
576 - Genetics & evolution
38
414 - Phonology & phonetics
33
380 - Commerce, communications & transportation
32
547 - Organic chemistry
29
500 - Natural sciences & mathematics
24
668 - Technology of other organic products
23
612 - Human physiology
20
530 - Physics
17
330 - Economics
15
572 - Biochemistry
15
615 - Pharmacology & therapeutics
15
551 - Geology, hydrology & meteorology
14
581 - Specific topics in natural history
13
660 - Chemical engineering
11
300 - Social sciences
9
630 - Agriculture & related technologies
9
800 - Literature & rhetoric
9
340 - Law
8
621 - Applied physics
8
658 - General management
7
661 - Industrial chemicals
7
720 - Architecture
7
541 - Physical chemistry
6
571 - Physiology & related subjects
6
616 - Diseases
6
570 - Life sciences; biology
5
100 - Philosophy & psychology
4
304 - Factors affecting social behavior
4
320 - Political science
4
370 - Education
4
614 - Incidence & prevention of disease
4
664 - Food technology
4
574 - [Unassigned]
3
628 - Sanitary & municipal engineering
3
632 - Plant injuries, diseases & pests
3
150 - Psychology
2
200 - Religion
2
301 - Sociology & anthropology
2
400 - Language
2
more ...