Classification
140 - Specific philosophical schools
320 - Political science
330 - Economics
333 - Economics of land & energy
51
700 - The arts; fine & decorative arts
46
363 - Other social problems & services
45
300 - Social sciences
35
000 - Computer science, information & general works
29
900 - History & geography
25
600 - Technology
22
100 - Philosophy & psychology
21
551 - Geology, hydrology & meteorology
21
610 - Medicine & health
19
340 - Law
17
380 - Commerce, communications & transportation
15
576 - Genetics & evolution
15
581 - Specific topics in natural history
14
200 - Religion
10
370 - Education
10
620 - Engineering & allied operations
10
170 - Ethics
9
304 - Factors affecting social behavior
9
301 - Sociology & anthropology
7
630 - Agriculture & related technologies
7
361 - Social problems & social welfare in general
6
580 - Plants (Botany)
6
800 - Literature & rhetoric
6
658 - General management
5
720 - Architecture
5
297 - Islam, Babism & Bahai Faith
4
360 - Social problems & services; associations
2
400 - Language
2
410 - Linguistics
2
414 - Phonology & phonetics
2
500 - Natural sciences & mathematics
2
657 - Accounting
2
336 - Public finance
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
780 - Music
1