Classification
320 - Political science
330 - Economics
1,107
900 - History & geography
199
340 - Law
158
300 - Social sciences
88
333 - Economics of land & energy
51
700 - The arts; fine & decorative arts
29
363 - Other social problems & services
20
304 - Factors affecting social behavior
15
600 - Technology
15
610 - Medicine & health
13
630 - Agriculture & related technologies
12
370 - Education
11
380 - Commerce, communications & transportation
9
350 - Public administration & military science
8
576 - Genetics & evolution
7
200 - Religion
6
301 - Sociology & anthropology
6
000 - Computer science, information & general works
4
400 - Language
4
100 - Philosophy & psychology
3
140 - Specific philosophical schools
3
297 - Islam, Babism & Bahai Faith
3
336 - Public finance
3
551 - Geology, hydrology & meteorology
3
620 - Engineering & allied operations
3
364 - Criminology
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
720 - Architecture
2
780 - Music
2
170 - Ethics
1
361 - Social problems & social welfare in general
1
581 - Specific topics in natural history
1
658 - General management
1
800 - Literature & rhetoric
1