Classification
140 - Specific philosophical schools
333 - Economics of land & energy
400 - Language
700 - The arts; fine & decorative arts
330 - Economics
5
600 - Technology
5
800 - Literature & rhetoric
5
000 - Computer science, information & general works
4
380 - Commerce, communications & transportation
4
300 - Social sciences
3
304 - Factors affecting social behavior
3
410 - Linguistics
3
500 - Natural sciences & mathematics
3
610 - Medicine & health
3
900 - History & geography
3
100 - Philosophy & psychology
2
301 - Sociology & anthropology
2
363 - Other social problems & services
2
370 - Education
2
620 - Engineering & allied operations
2
200 - Religion
1
320 - Political science
1
340 - Law
1
540 - Chemistry & allied sciences
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
780 - Music
1