Classification
333 - Economics of land & energy
330 - Economics
644
600 - Technology
345
320 - Political science
339
700 - The arts; fine & decorative arts
219
363 - Other social problems & services
214
620 - Engineering & allied operations
201
000 - Computer science, information & general works
183
380 - Commerce, communications & transportation
162
900 - History & geography
154
610 - Medicine & health
101
630 - Agriculture & related technologies
68
580 - Plants (Botany)
64
140 - Specific philosophical schools
61
370 - Education
60
576 - Genetics & evolution
50
551 - Geology, hydrology & meteorology
44
658 - General management
44
304 - Factors affecting social behavior
42
500 - Natural sciences & mathematics
39
581 - Specific topics in natural history
34
338 - Production
29
340 - Law
25
720 - Architecture
25
540 - Chemistry & allied sciences
20
300 - Social sciences
17
100 - Philosophy & psychology
15
414 - Phonology & phonetics
15
800 - Literature & rhetoric
15
530 - Physics
14
657 - Accounting
12
400 - Language
10
361 - Social problems & social welfare in general
9
170 - Ethics
8
350 - Public administration & military science
8
336 - Public finance
7
410 - Linguistics
7
297 - Islam, Babism & Bahai Faith
6
612 - Human physiology
5
200 - Religion
4
301 - Sociology & anthropology
4
332 - Financial economics
4
520 - Astronomy & allied sciences
4
650 - Management & auxiliary services
4
791 - Public performances
4
780 - Music
3
381 - Commerce
2
550 - Earth sciences
2
120 - Epistemology, causation & humankind
1
160 - Logic
1
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