Classification
540 - Chemistry & allied sciences
600 - Technology
620 - Engineering & allied operations
700 - The arts; fine & decorative arts
72
363 - Other social problems & services
65
333 - Economics of land & energy
55
900 - History & geography
46
000 - Computer science, information & general works
26
330 - Economics
24
610 - Medicine & health
24
630 - Agriculture & related technologies
20
500 - Natural sciences & mathematics
17
580 - Plants (Botany)
17
380 - Commerce, communications & transportation
16
576 - Genetics & evolution
9
140 - Specific philosophical schools
8
320 - Political science
8
530 - Physics
8
370 - Education
7
414 - Phonology & phonetics
7
551 - Geology, hydrology & meteorology
6
300 - Social sciences
5
400 - Language
4
581 - Specific topics in natural history
4
100 - Philosophy & psychology
3
304 - Factors affecting social behavior
3
340 - Law
3
612 - Human physiology
3
720 - Architecture
3
800 - Literature & rhetoric
3
301 - Sociology & anthropology
2
658 - General management
2
170 - Ethics
1
615 - Pharmacology & therapeutics
1
657 - Accounting
1