Classification
414 - Phonology & phonetics
700 - The arts; fine & decorative arts
900 - History & geography
41
600 - Technology
34
620 - Engineering & allied operations
34
333 - Economics of land & energy
14
580 - Plants (Botany)
11
576 - Genetics & evolution
9
363 - Other social problems & services
7
610 - Medicine & health
6
000 - Computer science, information & general works
5
330 - Economics
5
340 - Law
4
380 - Commerce, communications & transportation
4
500 - Natural sciences & mathematics
4
581 - Specific topics in natural history
3
140 - Specific philosophical schools
2
320 - Political science
2
100 - Philosophy & psychology
1
300 - Social sciences
1
400 - Language
1
530 - Physics
1
540 - Chemistry & allied sciences
1
630 - Agriculture & related technologies
1
720 - Architecture
1
800 - Literature & rhetoric
1