Classification
320 - Political science
610 - Medicine & health
330 - Economics
343
304 - Factors affecting social behavior
210
333 - Economics of land & energy
171
363 - Other social problems & services
92
370 - Education
70
600 - Technology
69
700 - The arts; fine & decorative arts
67
000 - Computer science, information & general works
45
140 - Specific philosophical schools
39
900 - History & geography
36
380 - Commerce, communications & transportation
35
630 - Agriculture & related technologies
31
551 - Geology, hydrology & meteorology
29
300 - Social sciences
23
340 - Law
21
100 - Philosophy & psychology
19
581 - Specific topics in natural history
18
170 - Ethics
14
620 - Engineering & allied operations
14
200 - Religion
12
361 - Social problems & social welfare in general
12
658 - General management
12
580 - Plants (Botany)
8
350 - Public administration & military science
6
500 - Natural sciences & mathematics
6
720 - Architecture
6
336 - Public finance
5
360 - Social problems & services; associations
5
400 - Language
5
576 - Genetics & evolution
5
410 - Linguistics
4
530 - Physics
4
615 - Pharmacology & therapeutics
4
800 - Literature & rhetoric
4
120 - Epistemology, causation & humankind
3
301 - Sociology & anthropology
3
540 - Chemistry & allied sciences
3
550 - Earth sciences
3
780 - Music
3
302 - Social interaction
1
414 - Phonology & phonetics
1
520 - Astronomy & allied sciences
1
612 - Human physiology
1
650 - Management & auxiliary services
1
657 - Accounting
1