Classification
000 - Computer science, information & general works
380 - Commerce, communications & transportation
400 - Language
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
7
900 - History & geography
7
600 - Technology
6
140 - Specific philosophical schools
4
330 - Economics
4
363 - Other social problems & services
4
720 - Architecture
4
333 - Economics of land & energy
3
370 - Education
3
320 - Political science
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
630 - Agriculture & related technologies
2
100 - Philosophy & psychology
1
170 - Ethics
1
300 - Social sciences
1
340 - Law
1
540 - Chemistry & allied sciences
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
610 - Medicine & health
1
780 - Music
1