Classification
000 - Computer science, information & general works
330 - Economics
370 - Education
600 - Technology
700 - The arts; fine & decorative arts
7
900 - History & geography
620 - Engineering & allied operations
6
320 - Political science
5
333 - Economics of land & energy
5
363 - Other social problems & services
3
380 - Commerce, communications & transportation
3
300 - Social sciences
2
304 - Factors affecting social behavior
2
610 - Medicine & health
2
630 - Agriculture & related technologies
2
720 - Architecture
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
170 - Ethics
1
200 - Religion
1
340 - Law
1
400 - Language
1
410 - Linguistics
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
581 - Specific topics in natural history
1
780 - Music
1