Classification
100 - Philosophy & psychology
333 - Economics of land & energy
7
330 - Economics
5
370 - Education
3
300 - Social sciences
2
700 - The arts; fine & decorative arts
2
000 - Computer science, information & general works
1
170 - Ethics
1
340 - Law
1
363 - Other social problems & services
1
380 - Commerce, communications & transportation
1
500 - Natural sciences & mathematics
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
658 - General management
1
780 - Music
1
800 - Literature & rhetoric
1
900 - History & geography
1