Classification
363 - Other social problems & services
600 - Technology
610 - Medicine & health
700 - The arts; fine & decorative arts
620 - Engineering & allied operations
47
333 - Economics of land & energy
45
000 - Computer science, information & general works
35
900 - History & geography
32
330 - Economics
25
140 - Specific philosophical schools
22
380 - Commerce, communications & transportation
21
580 - Plants (Botany)
21
630 - Agriculture & related technologies
17
320 - Political science
16
551 - Geology, hydrology & meteorology
16
720 - Architecture
12
370 - Education
11
340 - Law
9
576 - Genetics & evolution
9
414 - Phonology & phonetics
6
800 - Literature & rhetoric
6
170 - Ethics
5
540 - Chemistry & allied sciences
5
581 - Specific topics in natural history
5
612 - Human physiology
5
658 - General management
5
100 - Philosophy & psychology
4
500 - Natural sciences & mathematics
4
300 - Social sciences
2
304 - Factors affecting social behavior
2
361 - Social problems & social welfare in general
2
615 - Pharmacology & therapeutics
2
200 - Religion
1
350 - Public administration & military science
1
360 - Social problems & services; associations
1
400 - Language
1
530 - Physics
1