Classification
320 - Political science
330 - Economics
380 - Commerce, communications & transportation
657 - Accounting
600 - Technology
4
000 - Computer science, information & general works
3
333 - Economics of land & energy
3
363 - Other social problems & services
3
700 - The arts; fine & decorative arts
3
620 - Engineering & allied operations
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
300 - Social sciences
1
340 - Law
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
650 - Management & auxiliary services
1
800 - Literature & rhetoric
1
900 - History & geography
1