Classification
330 - Economics
363 - Other social problems & services
720 - Architecture
900 - History & geography
700 - The arts; fine & decorative arts
13
600 - Technology
11
000 - Computer science, information & general works
10
333 - Economics of land & energy
10
380 - Commerce, communications & transportation
10
620 - Engineering & allied operations
10
140 - Specific philosophical schools
6
370 - Education
6
610 - Medicine & health
6
551 - Geology, hydrology & meteorology
5
320 - Political science
4
800 - Literature & rhetoric
3
297 - Islam, Babism & Bahai Faith
2
576 - Genetics & evolution
2
658 - General management
2
170 - Ethics
1
200 - Religion
1
300 - Social sciences
1
301 - Sociology & anthropology
1
340 - Law
1
400 - Language
1
550 - Earth sciences
1
580 - Plants (Botany)
1
657 - Accounting
1