Classification
580 - Plants (Botany)
600 - Technology
610 - Medicine & health
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
39
333 - Economics of land & energy
26
900 - History & geography
24
363 - Other social problems & services
22
000 - Computer science, information & general works
20
630 - Agriculture & related technologies
19
140 - Specific philosophical schools
13
330 - Economics
10
380 - Commerce, communications & transportation
10
414 - Phonology & phonetics
7
551 - Geology, hydrology & meteorology
5
300 - Social sciences
4
340 - Law
4
540 - Chemistry & allied sciences
4
576 - Genetics & evolution
4
612 - Human physiology
4
720 - Architecture
4
170 - Ethics
3
500 - Natural sciences & mathematics
3
581 - Specific topics in natural history
3
800 - Literature & rhetoric
3
304 - Factors affecting social behavior
2
320 - Political science
2
370 - Education
2
400 - Language
2
530 - Physics
2
658 - General management
2
100 - Philosophy & psychology
1
520 - Astronomy & allied sciences
1
615 - Pharmacology & therapeutics
1