Classification
000 - Computer science, information & general works
610 - Medicine & health
620 - Engineering & allied operations
600 - Technology
85
700 - The arts; fine & decorative arts
61
630 - Agriculture & related technologies
45
333 - Economics of land & energy
44
363 - Other social problems & services
34
580 - Plants (Botany)
34
900 - History & geography
33
140 - Specific philosophical schools
24
330 - Economics
20
380 - Commerce, communications & transportation
19
540 - Chemistry & allied sciences
14
576 - Genetics & evolution
14
551 - Geology, hydrology & meteorology
13
720 - Architecture
11
500 - Natural sciences & mathematics
9
414 - Phonology & phonetics
8
581 - Specific topics in natural history
8
320 - Political science
7
370 - Education
6
658 - General management
6
612 - Human physiology
5
170 - Ethics
4
300 - Social sciences
4
410 - Linguistics
4
530 - Physics
4
304 - Factors affecting social behavior
3
361 - Social problems & social welfare in general
3
400 - Language
3
615 - Pharmacology & therapeutics
3
100 - Philosophy & psychology
2
800 - Literature & rhetoric
2
340 - Law
1
590 - Animals (Zoology)
1
780 - Music
1