Classification
300 - Social sciences
340 - Law
320 - Political science
337
330 - Economics
283
630 - Agriculture & related technologies
54
900 - History & geography
46
100 - Philosophy & psychology
33
301 - Sociology & anthropology
29
140 - Specific philosophical schools
26
700 - The arts; fine & decorative arts
24
200 - Religion
19
333 - Economics of land & energy
18
170 - Ethics
17
304 - Factors affecting social behavior
16
363 - Other social problems & services
16
370 - Education
16
600 - Technology
15
610 - Medicine & health
14
000 - Computer science, information & general works
13
364 - Criminology
12
380 - Commerce, communications & transportation
12
361 - Social problems & social welfare in general
9
620 - Engineering & allied operations
9
360 - Social problems & services; associations
7
400 - Language
7
800 - Literature & rhetoric
7
297 - Islam, Babism & Bahai Faith
4
576 - Genetics & evolution
4
720 - Architecture
4
658 - General management
3
120 - Epistemology, causation & humankind
2
410 - Linguistics
2
500 - Natural sciences & mathematics
2
551 - Geology, hydrology & meteorology
2
580 - Plants (Botany)
2
160 - Logic
1
337 - International economics
1
344 - Labor, social, education & cultural law
1
350 - Public administration & military science
1
398 - Folklore
1
530 - Physics
1
581 - Specific topics in natural history
1
770 - Photography, photographs & computer art
1
780 - Music
1
791 - Public performances
1