Classification
330 - Economics
400 - Language
333 - Economics of land & energy
5
600 - Technology
4
700 - The arts; fine & decorative arts
4
000 - Computer science, information & general works
3
300 - Social sciences
2
320 - Political science
2
363 - Other social problems & services
2
370 - Education
2
100 - Philosophy & psychology
1
140 - Specific philosophical schools
1
340 - Law
1
350 - Public administration & military science
1
410 - Linguistics
1
500 - Natural sciences & mathematics
1
576 - Genetics & evolution
1
580 - Plants (Botany)
1
610 - Medicine & health
1
620 - Engineering & allied operations
1
658 - General management
1
900 - History & geography
1