Classification
320 - Political science
330 - Economics
983
900 - History & geography
976
300 - Social sciences
758
700 - The arts; fine & decorative arts
639
333 - Economics of land & energy
573
100 - Philosophy & psychology
545
363 - Other social problems & services
429
340 - Law
372
140 - Specific philosophical schools
341
600 - Technology
299
000 - Computer science, information & general works
298
370 - Education
296
380 - Commerce, communications & transportation
265
200 - Religion
247
610 - Medicine & health
221
304 - Factors affecting social behavior
201
551 - Geology, hydrology & meteorology
196
301 - Sociology & anthropology
182
170 - Ethics
159
800 - Literature & rhetoric
152
620 - Engineering & allied operations
142
400 - Language
117
361 - Social problems & social welfare in general
110
630 - Agriculture & related technologies
93
581 - Specific topics in natural history
90
720 - Architecture
76
297 - Islam, Babism & Bahai Faith
75
350 - Public administration & military science
74
576 - Genetics & evolution
74
410 - Linguistics
66
658 - General management
53
780 - Music
46
500 - Natural sciences & mathematics
45
530 - Physics
37
580 - Plants (Botany)
37
120 - Epistemology, causation & humankind
32
360 - Social problems & services; associations
32
336 - Public finance
27
414 - Phonology & phonetics
20
540 - Chemistry & allied sciences
18
657 - Accounting
18
364 - Criminology
17
770 - Photography, photographs & computer art
11
791 - Public performances
11
550 - Earth sciences
8
296 - Judaism
5
520 - Astronomy & allied sciences
5
615 - Pharmacology & therapeutics
5
398 - Folklore
4
more ...