Classification
400 - Language
576 - Genetics & evolution
600 - Technology
16
000 - Computer science, information & general works
12
620 - Engineering & allied operations
7
700 - The arts; fine & decorative arts
7
900 - History & geography
7
140 - Specific philosophical schools
5
330 - Economics
5
410 - Linguistics
5
333 - Economics of land & energy
4
370 - Education
4
380 - Commerce, communications & transportation
3
610 - Medicine & health
3
100 - Philosophy & psychology
2
300 - Social sciences
2
301 - Sociology & anthropology
2
363 - Other social problems & services
2
414 - Phonology & phonetics
2
658 - General management
2
720 - Architecture
2
160 - Logic
1
340 - Law
1
530 - Physics
1
551 - Geology, hydrology & meteorology
1
580 - Plants (Botany)
1
581 - Specific topics in natural history
1
630 - Agriculture & related technologies
1
780 - Music
1