Classification
100 - Philosophy & psychology
320 - Political science
330 - Economics
340 - Law
64
300 - Social sciences
61
900 - History & geography
54
170 - Ethics
38
200 - Religion
20
140 - Specific philosophical schools
19
333 - Economics of land & energy
17
600 - Technology
16
700 - The arts; fine & decorative arts
13
361 - Social problems & social welfare in general
12
370 - Education
12
380 - Commerce, communications & transportation
12
363 - Other social problems & services
11
610 - Medicine & health
11
336 - Public finance
10
576 - Genetics & evolution
9
630 - Agriculture & related technologies
8
301 - Sociology & anthropology
7
620 - Engineering & allied operations
7
780 - Music
7
000 - Computer science, information & general works
6
400 - Language
6
350 - Public administration & military science
5
551 - Geology, hydrology & meteorology
5
581 - Specific topics in natural history
5
530 - Physics
4
800 - Literature & rhetoric
4
410 - Linguistics
3
500 - Natural sciences & mathematics
3
657 - Accounting
3
658 - General management
3
720 - Architecture
3
770 - Photography, photographs & computer art
3
304 - Factors affecting social behavior
2
160 - Logic
1
297 - Islam, Babism & Bahai Faith
1
360 - Social problems & services; associations
1
550 - Earth sciences
1
580 - Plants (Botany)
1
791 - Public performances
1
920 - Biography, genealogy & insignia
1