Classification
370 - Education
330 - Economics
976
320 - Political science
810
610 - Medicine & health
501
333 - Economics of land & energy
387
600 - Technology
337
700 - The arts; fine & decorative arts
310
100 - Philosophy & psychology
257
900 - History & geography
206
140 - Specific philosophical schools
194
304 - Factors affecting social behavior
188
363 - Other social problems & services
179
000 - Computer science, information & general works
162
300 - Social sciences
158
380 - Commerce, communications & transportation
152
400 - Language
134
500 - Natural sciences & mathematics
114
620 - Engineering & allied operations
104
200 - Religion
99
340 - Law
68
170 - Ethics
51
800 - Literature & rhetoric
50
301 - Sociology & anthropology
46
410 - Linguistics
45
551 - Geology, hydrology & meteorology
43
576 - Genetics & evolution
37
780 - Music
37
658 - General management
36
630 - Agriculture & related technologies
33
580 - Plants (Botany)
29
720 - Architecture
29
581 - Specific topics in natural history
23
530 - Physics
22
361 - Social problems & social welfare in general
21
297 - Islam, Babism & Bahai Faith
18
540 - Chemistry & allied sciences
18
160 - Logic
13
120 - Epistemology, causation & humankind
12
414 - Phonology & phonetics
11
791 - Public performances
11
612 - Human physiology
10
336 - Public finance
8
350 - Public administration & military science
8
360 - Social problems & services; associations
7
371 - Schools & their activities; special education
7
657 - Accounting
7
770 - Photography, photographs & computer art
7
153 - Mental processes & intelligence
6
615 - Pharmacology & therapeutics
5
362 - Social welfare problems & services
4
more ...