Classification
000 - Computer science, information & general works
610 - Medicine & health
700 - The arts; fine & decorative arts
18
333 - Economics of land & energy
15
580 - Plants (Botany)
15
140 - Specific philosophical schools
13
600 - Technology
12
620 - Engineering & allied operations
12
540 - Chemistry & allied sciences
8
363 - Other social problems & services
7
380 - Commerce, communications & transportation
7
330 - Economics
6
630 - Agriculture & related technologies
6
576 - Genetics & evolution
5
414 - Phonology & phonetics
4
551 - Geology, hydrology & meteorology
4
581 - Specific topics in natural history
4
612 - Human physiology
4
300 - Social sciences
3
500 - Natural sciences & mathematics
3
361 - Social problems & social welfare in general
2
370 - Education
2
720 - Architecture
2
900 - History & geography
2
400 - Language
1
530 - Physics
1
590 - Animals (Zoology)
1
616 - Diseases
1
658 - General management
1
800 - Literature & rhetoric
1