Classification
500 - Natural sciences & mathematics
600 - Technology
610 - Medicine & health
620 - Engineering & allied operations
900 - History & geography
11
333 - Economics of land & energy
8
700 - The arts; fine & decorative arts
8
000 - Computer science, information & general works
6
380 - Commerce, communications & transportation
6
370 - Education
4
580 - Plants (Botany)
4
100 - Philosophy & psychology
3
140 - Specific philosophical schools
3
363 - Other social problems & services
3
540 - Chemistry & allied sciences
3
576 - Genetics & evolution
3
630 - Agriculture & related technologies
3
330 - Economics
2
551 - Geology, hydrology & meteorology
2
581 - Specific topics in natural history
2
657 - Accounting
2
720 - Architecture
2
170 - Ethics
1
300 - Social sciences
1
320 - Political science
1
340 - Law
1
400 - Language
1
410 - Linguistics
1
414 - Phonology & phonetics
1
530 - Physics
1
612 - Human physiology
1