Classification
100 - Philosophy & psychology
380 - Commerce, communications & transportation
600 - Technology
000 - Computer science, information & general works
8
370 - Education
8
700 - The arts; fine & decorative arts
7
900 - History & geography
7
300 - Social sciences
6
620 - Engineering & allied operations
6
140 - Specific philosophical schools
5
320 - Political science
5
330 - Economics
5
400 - Language
4
780 - Music
4
340 - Law
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
610 - Medicine & health
2
120 - Epistemology, causation & humankind
1
170 - Ethics
1
200 - Religion
1
333 - Economics of land & energy
1
363 - Other social problems & services
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
658 - General management
1
720 - Architecture
1
800 - Literature & rhetoric
1