Classification
363 - Other social problems & services
380 - Commerce, communications & transportation
576 - Genetics & evolution
900 - History & geography
600 - Technology
14
700 - The arts; fine & decorative arts
13
620 - Engineering & allied operations
12
140 - Specific philosophical schools
9
333 - Economics of land & energy
8
720 - Architecture
7
000 - Computer science, information & general works
6
340 - Law
6
320 - Political science
5
610 - Medicine & health
5
330 - Economics
4
800 - Literature & rhetoric
4
300 - Social sciences
3
500 - Natural sciences & mathematics
3
170 - Ethics
2
304 - Factors affecting social behavior
2
530 - Physics
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
581 - Specific topics in natural history
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
364 - Criminology
1
370 - Education
1
400 - Language
1
414 - Phonology & phonetics
1
650 - Management & auxiliary services
1
658 - General management
1