Classification
610 - Medicine & health
283
700 - The arts; fine & decorative arts
234
000 - Computer science, information & general works
157
320 - Political science
154
600 - Technology
133
140 - Specific philosophical schools
128
900 - History & geography
128
333 - Economics of land & energy
126
330 - Economics
108
620 - Engineering & allied operations
92
306 - Culture & institutions
89
300 - Social sciences
79
100 - Philosophy & psychology
69
363 - Other social problems & services
61
380 - Commerce, communications & transportation
58
370 - Education
56
580 - Plants (Botany)
55
340 - Law
48
570 - Life sciences; biology
48
612 - Human physiology
48
530 - Physics
43
305 - Social groups
38
500 - Natural sciences & mathematics
38
576 - Genetics & evolution
36
800 - Literature & rhetoric
36
540 - Chemistry & allied sciences
29
170 - Ethics
26
304 - Factors affecting social behavior
26
301 - Sociology & anthropology
25
658 - General management
25
153 - Mental processes & intelligence
24
200 - Religion
21
128 - Humankind
20
328 - The legislative process
19
400 - Language
19
302 - Social interaction
17
384 - Communications; telecommunication
17
414 - Phonology & phonetics
17
630 - Agriculture & related technologies
15
158 - Applied psychology
14
551 - Geology, hydrology & meteorology
14
720 - Architecture
14
361 - Social problems & social welfare in general
13
581 - Specific topics in natural history
13
615 - Pharmacology & therapeutics
13
780 - Music
13
155 - Differential & developmental psychology
12
303 - Social processes
11
331 - Labor economics
11
820 - English & Old English literatures
11
more ...