Classification
320 - Political science
700 - The arts; fine & decorative arts
330 - Economics
1,251
900 - History & geography
339
333 - Economics of land & energy
171
363 - Other social problems & services
167
600 - Technology
159
340 - Law
158
000 - Computer science, information & general works
150
300 - Social sciences
124
140 - Specific philosophical schools
101
380 - Commerce, communications & transportation
92
551 - Geology, hydrology & meteorology
74
630 - Agriculture & related technologies
72
610 - Medicine & health
71
370 - Education
69
100 - Philosophy & psychology
65
620 - Engineering & allied operations
56
200 - Religion
49
800 - Literature & rhetoric
43
720 - Architecture
40
170 - Ethics
39
400 - Language
36
581 - Specific topics in natural history
36
301 - Sociology & anthropology
35
576 - Genetics & evolution
35
304 - Factors affecting social behavior
34
780 - Music
28
658 - General management
21
580 - Plants (Botany)
19
410 - Linguistics
18
297 - Islam, Babism & Bahai Faith
15
361 - Social problems & social welfare in general
14
500 - Natural sciences & mathematics
14
770 - Photography, photographs & computer art
10
414 - Phonology & phonetics
8
530 - Physics
8
657 - Accounting
6
350 - Public administration & military science
5
360 - Social problems & services; associations
5
540 - Chemistry & allied sciences
5
120 - Epistemology, causation & humankind
4
520 - Astronomy & allied sciences
4
615 - Pharmacology & therapeutics
4
791 - Public performances
4
364 - Criminology
3
398 - Folklore
3
160 - Logic
2
266 - Missions
2
296 - Judaism
2
more ...