Classification
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
2
170 - Ethics
1
320 - Political science
1
330 - Economics
5
333 - Economics of land & energy
5
363 - Other social problems & services
3
370 - Education
380 - Commerce, communications & transportation
2
551 - Geology, hydrology & meteorology
1
600 - Technology
4
610 - Medicine & health
620 - Engineering & allied operations
4
658 - General management
2
700 - The arts; fine & decorative arts
2
800 - Literature & rhetoric
1
900 - History & geography