Classification
340 - Law
363 - Other social problems & services
600 - Technology
620 - Engineering & allied operations
900 - History & geography
15
380 - Commerce, communications & transportation
12
700 - The arts; fine & decorative arts
11
333 - Economics of land & energy
9
140 - Specific philosophical schools
8
000 - Computer science, information & general works
6
330 - Economics
6
576 - Genetics & evolution
6
720 - Architecture
6
500 - Natural sciences & mathematics
5
320 - Political science
4
370 - Education
4
400 - Language
4
580 - Plants (Botany)
4
610 - Medicine & health
4
300 - Social sciences
3
630 - Agriculture & related technologies
3
170 - Ethics
2
551 - Geology, hydrology & meteorology
2
800 - Literature & rhetoric
2
200 - Religion
1
304 - Factors affecting social behavior
1
410 - Linguistics
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
657 - Accounting
1