Classification
610 - Medicine & health
297
700 - The arts; fine & decorative arts
249
320 - Political science
165
000 - Computer science, information & general works
159
900 - History & geography
145
140 - Specific philosophical schools
139
600 - Technology
138
333 - Economics of land & energy
129
330 - Economics
111
300 - Social sciences
103
620 - Engineering & allied operations
92
306 - Culture & institutions
90
100 - Philosophy & psychology
83
363 - Other social problems & services
62
380 - Commerce, communications & transportation
60
370 - Education
57
580 - Plants (Botany)
55
340 - Law
54
570 - Life sciences; biology
48
612 - Human physiology
47
800 - Literature & rhetoric
45
530 - Physics
44
500 - Natural sciences & mathematics
42
576 - Genetics & evolution
40
301 - Sociology & anthropology
38
305 - Social groups
38
304 - Factors affecting social behavior
33
170 - Ethics
31
540 - Chemistry & allied sciences
30
200 - Religion
27
400 - Language
26
153 - Mental processes & intelligence
25
658 - General management
25
128 - Humankind
20
780 - Music
20
328 - The legislative process
19
302 - Social interaction
17
384 - Communications; telecommunication
17
414 - Phonology & phonetics
17
158 - Applied psychology
15
630 - Agriculture & related technologies
15
551 - Geology, hydrology & meteorology
14
581 - Specific topics in natural history
14
720 - Architecture
14
361 - Social problems & social welfare in general
13
615 - Pharmacology & therapeutics
13
155 - Differential & developmental psychology
12
303 - Social processes
11
331 - Labor economics
11
820 - English & Old English literatures
11
more ...