Classification
300 - Social sciences
363 - Other social problems & services
380 - Commerce, communications & transportation
700 - The arts; fine & decorative arts
9
000 - Computer science, information & general works
7
330 - Economics
7
333 - Economics of land & energy
7
600 - Technology
7
610 - Medicine & health
7
140 - Specific philosophical schools
6
320 - Political science
6
551 - Geology, hydrology & meteorology
5
576 - Genetics & evolution
5
580 - Plants (Botany)
5
581 - Specific topics in natural history
5
620 - Engineering & allied operations
5
500 - Natural sciences & mathematics
4
900 - History & geography
4
414 - Phonology & phonetics
3
540 - Chemistry & allied sciences
3
612 - Human physiology
3
170 - Ethics
2
340 - Law
2
370 - Education
2
630 - Agriculture & related technologies
2
720 - Architecture
2
800 - Literature & rhetoric
2
200 - Religion
1
304 - Factors affecting social behavior
1
400 - Language
1
410 - Linguistics
1
650 - Management & auxiliary services
1
657 - Accounting
1