Classification
330 - Economics
147
000 - Computer science, information & general works
88
610 - Medicine & health
79
630 - Agriculture & related technologies
79
580 - Plants (Botany)
77
320 - Political science
76
700 - The arts; fine & decorative arts
76
333 - Economics of land & energy
73
600 - Technology
72
363 - Other social problems & services
62
620 - Engineering & allied operations
58
551 - Geology, hydrology & meteorology
31
380 - Commerce, communications & transportation
30
612 - Human physiology
23
900 - History & geography
23
140 - Specific philosophical schools
22
304 - Factors affecting social behavior
20
570 - Life sciences; biology
20
581 - Specific topics in natural history
17
540 - Chemistry & allied sciences
15
340 - Law
14
414 - Phonology & phonetics
14
800 - Literature & rhetoric
12
300 - Social sciences
10
720 - Architecture
10
576 - Genetics & evolution
9
500 - Natural sciences & mathematics
8
370 - Education
6
658 - General management
6
361 - Social problems & social welfare in general
5
170 - Ethics
4
305 - Social groups
4
615 - Pharmacology & therapeutics
4
100 - Philosophy & psychology
3
301 - Sociology & anthropology
3
530 - Physics
3
618 - Gynecology, obstetrics, pediatrics & geriatrics
3
631 - Techniques, equipment & materials
3
306 - Culture & institutions
2
362 - Social welfare problems & services
2
400 - Language
2
590 - Animals (Zoology)
2
628 - Sanitary & municipal engineering
2
780 - Music
2
160 - Logic
1
176 - Ethics of sex & reproduction
1
302 - Social interaction
1
336 - Public finance
1
376 - [Unassigned]
1
410 - Linguistics
1
more ...