Classification
320 - Political science
330 - Economics
815
333 - Economics of land & energy
288
363 - Other social problems & services
110
600 - Technology
100
380 - Commerce, communications & transportation
79
610 - Medicine & health
72
700 - The arts; fine & decorative arts
69
361 - Social problems & social welfare in general
66
900 - History & geography
66
360 - Social problems & services; associations
57
370 - Education
54
300 - Social sciences
51
340 - Law
51
000 - Computer science, information & general works
50
304 - Factors affecting social behavior
43
140 - Specific philosophical schools
37
630 - Agriculture & related technologies
27
551 - Geology, hydrology & meteorology
24
576 - Genetics & evolution
17
620 - Engineering & allied operations
17
100 - Philosophy & psychology
15
364 - Criminology
11
658 - General management
11
170 - Ethics
10
720 - Architecture
10
301 - Sociology & anthropology
8
500 - Natural sciences & mathematics
8
800 - Literature & rhetoric
8
581 - Specific topics in natural history
7
580 - Plants (Botany)
6
297 - Islam, Babism & Bahai Faith
5
350 - Public administration & military science
5
400 - Language
5
200 - Religion
4
410 - Linguistics
4
657 - Accounting
4
414 - Phonology & phonetics
2
540 - Chemistry & allied sciences
2
160 - Logic
1
530 - Physics
1