Classification
000 - Computer science, information & general works
300 - Social sciences
320 - Political science
330 - Economics
333 - Economics of land & energy
13
700 - The arts; fine & decorative arts
11
900 - History & geography
10
600 - Technology
9
100 - Philosophy & psychology
8
140 - Specific philosophical schools
7
363 - Other social problems & services
7
380 - Commerce, communications & transportation
7
340 - Law
5
620 - Engineering & allied operations
5
370 - Education
4
170 - Ethics
3
200 - Religion
3
301 - Sociology & anthropology
3
410 - Linguistics
3
630 - Agriculture & related technologies
3
304 - Factors affecting social behavior
2
400 - Language
2
500 - Natural sciences & mathematics
2
610 - Medicine & health
2
780 - Music
2
800 - Literature & rhetoric
2
120 - Epistemology, causation & humankind
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
658 - General management
1
720 - Architecture
1
770 - Photography, photographs & computer art
1
791 - Public performances
1