Classification
000 - Computer science, information & general works
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
600 - Technology
333 - Economics of land & energy
10
700 - The arts; fine & decorative arts
9
370 - Education
6
620 - Engineering & allied operations
5
363 - Other social problems & services
4
900 - History & geography
4
140 - Specific philosophical schools
3
300 - Social sciences
3
551 - Geology, hydrology & meteorology
3
576 - Genetics & evolution
3
610 - Medicine & health
3
340 - Law
2
500 - Natural sciences & mathematics
2
630 - Agriculture & related technologies
2
657 - Accounting
2
720 - Architecture
2
100 - Philosophy & psychology
1
170 - Ethics
1
400 - Language
1
410 - Linguistics
1
530 - Physics
1
581 - Specific topics in natural history
1
658 - General management
1
780 - Music
1
800 - Literature & rhetoric
1