Classification
330 - Economics
516
333 - Economics of land & energy
365
700 - The arts; fine & decorative arts
349
320 - Political science
338
300 - Social sciences
335
900 - History & geography
304
610 - Medicine & health
269
200 - Religion
240
577 - Ecology
225
000 - Computer science, information & general works
218
363 - Other social problems & services
217
370 - Education
158
600 - Technology
157
304 - Factors affecting social behavior
150
140 - Specific philosophical schools
149
155 - Differential & developmental psychology
124
551 - Geology, hydrology & meteorology
123
301 - Sociology & anthropology
119
340 - Law
111
380 - Commerce, communications & transportation
104
580 - Plants (Botany)
104
581 - Specific topics in natural history
99
100 - Philosophy & psychology
96
620 - Engineering & allied operations
86
361 - Social problems & social welfare in general
83
630 - Agriculture & related technologies
77
800 - Literature & rhetoric
69
720 - Architecture
63
297 - Islam, Babism & Bahai Faith
57
576 - Genetics & evolution
56
306 - Culture & institutions
51
658 - General management
51
400 - Language
48
307 - Communities
45
500 - Natural sciences & mathematics
39
338 - Production
38
296 - Judaism
34
410 - Linguistics
33
343 - Military, tax, trade & industrial law
30
570 - Life sciences; biology
29
579 - Microorganisms, fungi & algae
29
910 - Geography & travel
28
305 - Social groups
26
341 - Law of nations
26
780 - Music
24
003 - Systems
23
170 - Ethics
23
360 - Social problems & services; associations
23
540 - Chemistry & allied sciences
23
616 - Diseases
23
more ...