Classification
100 - Philosophy & psychology
330 - Economics
320 - Political science
152
300 - Social sciences
59
900 - History & geography
56
170 - Ethics
45
333 - Economics of land & energy
44
610 - Medicine & health
32
700 - The arts; fine & decorative arts
32
140 - Specific philosophical schools
30
600 - Technology
30
340 - Law
27
363 - Other social problems & services
26
370 - Education
23
200 - Religion
19
000 - Computer science, information & general works
18
620 - Engineering & allied operations
16
380 - Commerce, communications & transportation
14
500 - Natural sciences & mathematics
13
780 - Music
12
658 - General management
11
301 - Sociology & anthropology
10
576 - Genetics & evolution
9
581 - Specific topics in natural history
9
400 - Language
8
551 - Geology, hydrology & meteorology
8
800 - Literature & rhetoric
8
630 - Agriculture & related technologies
7
361 - Social problems & social welfare in general
6
530 - Physics
5
410 - Linguistics
4
580 - Plants (Botany)
4
657 - Accounting
4
720 - Architecture
4
304 - Factors affecting social behavior
3
350 - Public administration & military science
3
612 - Human physiology
3
770 - Photography, photographs & computer art
3
791 - Public performances
2
120 - Epistemology, causation & humankind
1
297 - Islam, Babism & Bahai Faith
1
306 - Culture & institutions
1
336 - Public finance
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1