Classification
340 - Law
363 - Other social problems & services
620 - Engineering & allied operations
16
900 - History & geography
600 - Technology
15
380 - Commerce, communications & transportation
11
700 - The arts; fine & decorative arts
10
140 - Specific philosophical schools
7
720 - Architecture
7
333 - Economics of land & energy
6
576 - Genetics & evolution
6
000 - Computer science, information & general works
4
320 - Political science
4
330 - Economics
4
610 - Medicine & health
4
300 - Social sciences
3
370 - Education
3
500 - Natural sciences & mathematics
3
800 - Literature & rhetoric
3
170 - Ethics
2
200 - Religion
2
400 - Language
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
630 - Agriculture & related technologies
2
297 - Islam, Babism & Bahai Faith
1
301 - Sociology & anthropology
1
304 - Factors affecting social behavior
1
410 - Linguistics
1
581 - Specific topics in natural history
1
657 - Accounting
1