Classification
320 - Political science
581 - Specific topics in natural history
363 - Other social problems & services
57
333 - Economics of land & energy
39
700 - The arts; fine & decorative arts
37
330 - Economics
34
140 - Specific philosophical schools
31
900 - History & geography
24
551 - Geology, hydrology & meteorology
23
600 - Technology
23
000 - Computer science, information & general works
21
610 - Medicine & health
17
200 - Religion
14
100 - Philosophy & psychology
13
300 - Social sciences
12
380 - Commerce, communications & transportation
12
630 - Agriculture & related technologies
12
340 - Law
11
620 - Engineering & allied operations
11
170 - Ethics
8
301 - Sociology & anthropology
7
370 - Education
7
304 - Factors affecting social behavior
6
576 - Genetics & evolution
5
580 - Plants (Botany)
5
400 - Language
4
414 - Phonology & phonetics
3
658 - General management
3
720 - Architecture
3
800 - Literature & rhetoric
3
120 - Epistemology, causation & humankind
2
297 - Islam, Babism & Bahai Faith
2
350 - Public administration & military science
2
361 - Social problems & social welfare in general
2
530 - Physics
2
540 - Chemistry & allied sciences
2
410 - Linguistics
1
780 - Music
1
791 - Public performances
1