Classification
304 - Factors affecting social behavior
330 - Economics
320 - Political science
39
333 - Economics of land & energy
38
700 - The arts; fine & decorative arts
36
300 - Social sciences
31
900 - History & geography
26
000 - Computer science, information & general works
25
140 - Specific philosophical schools
24
363 - Other social problems & services
24
610 - Medicine & health
24
380 - Commerce, communications & transportation
18
600 - Technology
18
370 - Education
15
301 - Sociology & anthropology
14
340 - Law
14
551 - Geology, hydrology & meteorology
10
100 - Philosophy & psychology
9
620 - Engineering & allied operations
9
580 - Plants (Botany)
8
200 - Religion
7
576 - Genetics & evolution
7
581 - Specific topics in natural history
7
361 - Social problems & social welfare in general
6
630 - Agriculture & related technologies
6
800 - Literature & rhetoric
6
400 - Language
5
297 - Islam, Babism & Bahai Faith
3
414 - Phonology & phonetics
3
500 - Natural sciences & mathematics
3
540 - Chemistry & allied sciences
3
658 - General management
3
170 - Ethics
2
350 - Public administration & military science
2
550 - Earth sciences
2
780 - Music
2
360 - Social problems & services; associations
1
364 - Criminology
1
520 - Astronomy & allied sciences
1
530 - Physics
1
720 - Architecture
1