Classification
300 - Social sciences
25
330 - Economics
25
658 - General management
21
320 - Political science
19
333 - Economics of land & energy
17
370 - Education
16
540 - Chemistry & allied sciences
15
700 - The arts; fine & decorative arts
15
610 - Medicine & health
13
100 - Philosophy & psychology
11
140 - Specific philosophical schools
10
363 - Other social problems & services
9
380 - Commerce, communications & transportation
9
900 - History & geography
9
340 - Law
8
600 - Technology
7
301 - Sociology & anthropology
6
500 - Natural sciences & mathematics
6
000 - Computer science, information & general works
5
304 - Factors affecting social behavior
5
384 - Communications; telecommunication
5
170 - Ethics
4
302 - Social interaction
4
338 - Production
4
361 - Social problems & social welfare in general
4
800 - Literature & rhetoric
4
200 - Religion
3
570 - Life sciences; biology
3
580 - Plants (Botany)
3
331 - Labor economics
2
547 - Organic chemistry
2
620 - Engineering & allied operations
2
630 - Agriculture & related technologies
2
003 - Systems
1
006 - Special computer methods
1
120 - Epistemology, causation & humankind
1
158 - Applied psychology
1
160 - Logic
1
174 - Occupational ethics
1
305 - Social groups
1
332 - Financial economics
1
341 - Law of nations
1
350 - Public administration & military science
1
364 - Criminology
1
371 - Schools & their activities; special education
1
379 - Public policy issues in education
1
400 - Language
1
530 - Physics
1
576 - Genetics & evolution
1
577 - Ecology
1
more ...