Classification
330 - Economics
380 - Commerce, communications & transportation
620 - Engineering & allied operations
4
700 - The arts; fine & decorative arts
800 - Literature & rhetoric
900 - History & geography
333 - Economics of land & energy
3
610 - Medicine & health
3
363 - Other social problems & services
2
370 - Education
2
600 - Technology
2
720 - Architecture
2
000 - Computer science, information & general works
1
140 - Specific philosophical schools
1
200 - Religion
1
297 - Islam, Babism & Bahai Faith
1
300 - Social sciences
1
301 - Sociology & anthropology
1
340 - Law
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
658 - General management
1