Classification
340 - Law
4
600 - Technology
4
620 - Engineering & allied operations
658 - General management
700 - The arts; fine & decorative arts
330 - Economics
3
320 - Political science
2
580 - Plants (Botany)
2
900 - History & geography
2
000 - Computer science, information & general works
1
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
170 - Ethics
1
300 - Social sciences
1
333 - Economics of land & energy
1
370 - Education
1
380 - Commerce, communications & transportation
1
400 - Language
1
410 - Linguistics
1
551 - Geology, hydrology & meteorology
1
576 - Genetics & evolution
1
610 - Medicine & health
1
630 - Agriculture & related technologies
1
780 - Music
1