Classification
000 - Computer science, information & general works
330 - Economics
600 - Technology
610 - Medicine & health
620 - Engineering & allied operations
333 - Economics of land & energy
12
700 - The arts; fine & decorative arts
11
900 - History & geography
10
363 - Other social problems & services
9
140 - Specific philosophical schools
6
551 - Geology, hydrology & meteorology
6
630 - Agriculture & related technologies
6
320 - Political science
5
380 - Commerce, communications & transportation
5
720 - Architecture
4
170 - Ethics
3
580 - Plants (Botany)
3
658 - General management
3
576 - Genetics & evolution
2
581 - Specific topics in natural history
2
100 - Philosophy & psychology
1
300 - Social sciences
1
340 - Law
1
361 - Social problems & social welfare in general
1
370 - Education
1
500 - Natural sciences & mathematics
1
530 - Physics
1
615 - Pharmacology & therapeutics
1