Classification
333 - Economics of land & energy
370 - Education
700 - The arts; fine & decorative arts
13
610 - Medicine & health
7
000 - Computer science, information & general works
6
500 - Natural sciences & mathematics
5
100 - Philosophy & psychology
4
140 - Specific philosophical schools
4
300 - Social sciences
4
320 - Political science
4
380 - Commerce, communications & transportation
4
620 - Engineering & allied operations
4
330 - Economics
3
363 - Other social problems & services
3
600 - Technology
3
900 - History & geography
3
301 - Sociology & anthropology
2
304 - Factors affecting social behavior
2
340 - Law
2
400 - Language
2
581 - Specific topics in natural history
2
658 - General management
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
520 - Astronomy & allied sciences
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
630 - Agriculture & related technologies
1
780 - Music
1