Classification
330 - Economics
370 - Education
320 - Political science
755
610 - Medicine & health
172
333 - Economics of land & energy
140
600 - Technology
131
304 - Factors affecting social behavior
125
700 - The arts; fine & decorative arts
85
363 - Other social problems & services
80
900 - History & geography
78
300 - Social sciences
64
200 - Religion
59
380 - Commerce, communications & transportation
47
140 - Specific philosophical schools
46
340 - Law
44
620 - Engineering & allied operations
41
000 - Computer science, information & general works
40
630 - Agriculture & related technologies
37
100 - Philosophy & psychology
26
658 - General management
19
400 - Language
18
551 - Geology, hydrology & meteorology
18
170 - Ethics
17
160 - Logic
14
500 - Natural sciences & mathematics
11
576 - Genetics & evolution
11
800 - Literature & rhetoric
10
361 - Social problems & social welfare in general
9
720 - Architecture
9
780 - Music
9
410 - Linguistics
8
580 - Plants (Botany)
8
581 - Specific topics in natural history
8
301 - Sociology & anthropology
6
336 - Public finance
6
791 - Public performances
5
297 - Islam, Babism & Bahai Faith
4
657 - Accounting
4
360 - Social problems & services; associations
3
530 - Physics
3
540 - Chemistry & allied sciences
3
153 - Mental processes & intelligence
2
350 - Public administration & military science
2
372 - Elementary education
2
414 - Phonology & phonetics
2
550 - Earth sciences
2
612 - Human physiology
2
770 - Photography, photographs & computer art
2
120 - Epistemology, causation & humankind
1
331 - Labor economics
1
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