Classification
330 - Economics
620 - Engineering & allied operations
600 - Technology
5
900 - History & geography
5
000 - Computer science, information & general works
3
333 - Economics of land & energy
3
551 - Geology, hydrology & meteorology
3
580 - Plants (Botany)
3
630 - Agriculture & related technologies
3
700 - The arts; fine & decorative arts
3
140 - Specific philosophical schools
2
363 - Other social problems & services
2
370 - Education
2
380 - Commerce, communications & transportation
2
610 - Medicine & health
2
800 - Literature & rhetoric
2
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
320 - Political science
1
340 - Law
1
658 - General management
1
720 - Architecture
1