Classification
370 - Education
300 - Social sciences
25
330 - Economics
20
333 - Economics of land & energy
19
610 - Medicine & health
19
700 - The arts; fine & decorative arts
18
304 - Factors affecting social behavior
16
100 - Philosophy & psychology
15
320 - Political science
15
140 - Specific philosophical schools
10
380 - Commerce, communications & transportation
10
900 - History & geography
10
000 - Computer science, information & general works
7
363 - Other social problems & services
7
600 - Technology
6
200 - Religion
5
301 - Sociology & anthropology
5
340 - Law
3
361 - Social problems & social welfare in general
3
400 - Language
3
620 - Engineering & allied operations
3
658 - General management
3
170 - Ethics
2
297 - Islam, Babism & Bahai Faith
2
360 - Social problems & services; associations
2
364 - Criminology
2
500 - Natural sciences & mathematics
2
576 - Genetics & evolution
2
350 - Public administration & military science
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
780 - Music
1